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637 lines
16 KiB
637 lines
16 KiB
/**
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* lodash (Custom Build) <https://lodash.com/>
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* Build: `lodash modularize exports="npm" -o ./`
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* Copyright jQuery Foundation and other contributors <https://jquery.org/>
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* Released under MIT license <https://lodash.com/license>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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*/
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/** Used as references for various `Number` constants. */
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var MAX_SAFE_INTEGER = 9007199254740991;
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/** `Object#toString` result references. */
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var argsTag = '[object Arguments]',
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funcTag = '[object Function]',
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genTag = '[object GeneratorFunction]';
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/** Used to detect unsigned integer values. */
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var reIsUint = /^(?:0|[1-9]\d*)$/;
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/**
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* A faster alternative to `Function#apply`, this function invokes `func`
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* with the `this` binding of `thisArg` and the arguments of `args`.
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*
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* @private
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* @param {Function} func The function to invoke.
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* @param {*} thisArg The `this` binding of `func`.
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* @param {Array} args The arguments to invoke `func` with.
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* @returns {*} Returns the result of `func`.
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*/
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function apply(func, thisArg, args) {
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switch (args.length) {
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case 0: return func.call(thisArg);
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case 1: return func.call(thisArg, args[0]);
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case 2: return func.call(thisArg, args[0], args[1]);
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case 3: return func.call(thisArg, args[0], args[1], args[2]);
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}
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return func.apply(thisArg, args);
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}
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/**
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* The base implementation of `_.times` without support for iteratee shorthands
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* or max array length checks.
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*
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* @private
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* @param {number} n The number of times to invoke `iteratee`.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns the array of results.
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*/
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function baseTimes(n, iteratee) {
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var index = -1,
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result = Array(n);
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while (++index < n) {
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result[index] = iteratee(index);
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}
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return result;
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}
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/**
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* Creates a unary function that invokes `func` with its argument transformed.
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*
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* @private
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* @param {Function} func The function to wrap.
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* @param {Function} transform The argument transform.
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* @returns {Function} Returns the new function.
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*/
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function overArg(func, transform) {
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return function(arg) {
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return func(transform(arg));
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};
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}
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/** Used for built-in method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* Used to resolve the
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* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
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* of values.
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*/
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var objectToString = objectProto.toString;
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/** Built-in value references. */
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var propertyIsEnumerable = objectProto.propertyIsEnumerable;
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/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeKeys = overArg(Object.keys, Object),
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nativeMax = Math.max;
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/** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
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var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
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/**
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* Creates an array of the enumerable property names of the array-like `value`.
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*
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* @private
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* @param {*} value The value to query.
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* @param {boolean} inherited Specify returning inherited property names.
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* @returns {Array} Returns the array of property names.
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*/
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function arrayLikeKeys(value, inherited) {
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// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
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// Safari 9 makes `arguments.length` enumerable in strict mode.
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var result = (isArray(value) || isArguments(value))
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? baseTimes(value.length, String)
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: [];
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var length = result.length,
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skipIndexes = !!length;
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for (var key in value) {
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if ((inherited || hasOwnProperty.call(value, key)) &&
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!(skipIndexes && (key == 'length' || isIndex(key, length)))) {
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result.push(key);
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}
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}
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return result;
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}
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/**
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* Assigns `value` to `key` of `object` if the existing value is not equivalent
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* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
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* for equality comparisons.
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*
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* @private
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* @param {Object} object The object to modify.
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* @param {string} key The key of the property to assign.
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* @param {*} value The value to assign.
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*/
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function assignValue(object, key, value) {
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var objValue = object[key];
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if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
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(value === undefined && !(key in object))) {
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object[key] = value;
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}
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}
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/**
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* The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
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*
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* @private
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* @param {Object} object The object to query.
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* @returns {Array} Returns the array of property names.
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*/
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function baseKeys(object) {
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if (!isPrototype(object)) {
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return nativeKeys(object);
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}
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var result = [];
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for (var key in Object(object)) {
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if (hasOwnProperty.call(object, key) && key != 'constructor') {
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result.push(key);
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}
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}
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return result;
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}
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/**
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* The base implementation of `_.rest` which doesn't validate or coerce arguments.
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*
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* @private
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* @param {Function} func The function to apply a rest parameter to.
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* @param {number} [start=func.length-1] The start position of the rest parameter.
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* @returns {Function} Returns the new function.
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*/
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function baseRest(func, start) {
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start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
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return function() {
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var args = arguments,
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index = -1,
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length = nativeMax(args.length - start, 0),
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array = Array(length);
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while (++index < length) {
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array[index] = args[start + index];
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}
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index = -1;
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var otherArgs = Array(start + 1);
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while (++index < start) {
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otherArgs[index] = args[index];
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}
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otherArgs[start] = array;
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return apply(func, this, otherArgs);
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};
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}
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/**
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* Copies properties of `source` to `object`.
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*
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* @private
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* @param {Object} source The object to copy properties from.
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* @param {Array} props The property identifiers to copy.
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* @param {Object} [object={}] The object to copy properties to.
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* @param {Function} [customizer] The function to customize copied values.
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* @returns {Object} Returns `object`.
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*/
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function copyObject(source, props, object, customizer) {
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object || (object = {});
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var index = -1,
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length = props.length;
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while (++index < length) {
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var key = props[index];
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var newValue = customizer
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? customizer(object[key], source[key], key, object, source)
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: undefined;
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assignValue(object, key, newValue === undefined ? source[key] : newValue);
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}
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return object;
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}
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/**
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* Creates a function like `_.assign`.
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*
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* @private
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* @param {Function} assigner The function to assign values.
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* @returns {Function} Returns the new assigner function.
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*/
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function createAssigner(assigner) {
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return baseRest(function(object, sources) {
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var index = -1,
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length = sources.length,
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customizer = length > 1 ? sources[length - 1] : undefined,
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guard = length > 2 ? sources[2] : undefined;
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customizer = (assigner.length > 3 && typeof customizer == 'function')
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? (length--, customizer)
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: undefined;
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if (guard && isIterateeCall(sources[0], sources[1], guard)) {
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customizer = length < 3 ? undefined : customizer;
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length = 1;
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}
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object = Object(object);
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while (++index < length) {
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var source = sources[index];
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if (source) {
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assigner(object, source, index, customizer);
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}
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}
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return object;
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});
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}
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/**
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* Checks if `value` is a valid array-like index.
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*
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* @private
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* @param {*} value The value to check.
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* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
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* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
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*/
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function isIndex(value, length) {
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length = length == null ? MAX_SAFE_INTEGER : length;
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return !!length &&
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(typeof value == 'number' || reIsUint.test(value)) &&
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(value > -1 && value % 1 == 0 && value < length);
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}
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/**
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* Checks if the given arguments are from an iteratee call.
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*
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* @private
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* @param {*} value The potential iteratee value argument.
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* @param {*} index The potential iteratee index or key argument.
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* @param {*} object The potential iteratee object argument.
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* @returns {boolean} Returns `true` if the arguments are from an iteratee call,
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* else `false`.
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*/
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function isIterateeCall(value, index, object) {
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if (!isObject(object)) {
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return false;
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}
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var type = typeof index;
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if (type == 'number'
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? (isArrayLike(object) && isIndex(index, object.length))
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: (type == 'string' && index in object)
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) {
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return eq(object[index], value);
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}
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return false;
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}
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/**
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* Checks if `value` is likely a prototype object.
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*
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* @private
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
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*/
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function isPrototype(value) {
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var Ctor = value && value.constructor,
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proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
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return value === proto;
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}
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/**
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* Performs a
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* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
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* comparison between two values to determine if they are equivalent.
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to compare.
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* @param {*} other The other value to compare.
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* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
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* @example
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*
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* var object = { 'a': 1 };
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* var other = { 'a': 1 };
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*
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* _.eq(object, object);
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* // => true
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*
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* _.eq(object, other);
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* // => false
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*
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* _.eq('a', 'a');
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* // => true
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*
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* _.eq('a', Object('a'));
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* // => false
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*
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* _.eq(NaN, NaN);
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* // => true
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*/
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function eq(value, other) {
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return value === other || (value !== value && other !== other);
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}
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/**
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* Checks if `value` is likely an `arguments` object.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an `arguments` object,
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* else `false`.
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* @example
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*
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* _.isArguments(function() { return arguments; }());
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* // => true
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*
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* _.isArguments([1, 2, 3]);
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* // => false
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*/
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function isArguments(value) {
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// Safari 8.1 makes `arguments.callee` enumerable in strict mode.
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return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
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(!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
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}
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/**
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* Checks if `value` is classified as an `Array` object.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an array, else `false`.
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* @example
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*
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* _.isArray([1, 2, 3]);
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* // => true
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*
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* _.isArray(document.body.children);
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* // => false
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*
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* _.isArray('abc');
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* // => false
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*
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* _.isArray(_.noop);
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* // => false
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*/
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var isArray = Array.isArray;
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/**
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* Checks if `value` is array-like. A value is considered array-like if it's
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* not a function and has a `value.length` that's an integer greater than or
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* equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is array-like, else `false`.
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* @example
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*
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* _.isArrayLike([1, 2, 3]);
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* // => true
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*
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* _.isArrayLike(document.body.children);
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* // => true
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*
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* _.isArrayLike('abc');
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* // => true
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*
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* _.isArrayLike(_.noop);
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* // => false
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*/
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function isArrayLike(value) {
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return value != null && isLength(value.length) && !isFunction(value);
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}
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/**
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* This method is like `_.isArrayLike` except that it also checks if `value`
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* is an object.
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an array-like object,
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* else `false`.
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* @example
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*
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* _.isArrayLikeObject([1, 2, 3]);
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* // => true
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*
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* _.isArrayLikeObject(document.body.children);
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* // => true
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*
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* _.isArrayLikeObject('abc');
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* // => false
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*
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* _.isArrayLikeObject(_.noop);
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* // => false
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*/
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function isArrayLikeObject(value) {
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return isObjectLike(value) && isArrayLike(value);
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}
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/**
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* Checks if `value` is classified as a `Function` object.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a function, else `false`.
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* @example
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*
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* _.isFunction(_);
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* // => true
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*
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* _.isFunction(/abc/);
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* // => false
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*/
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function isFunction(value) {
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// The use of `Object#toString` avoids issues with the `typeof` operator
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// in Safari 8-9 which returns 'object' for typed array and other constructors.
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var tag = isObject(value) ? objectToString.call(value) : '';
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return tag == funcTag || tag == genTag;
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}
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/**
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* Checks if `value` is a valid array-like length.
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*
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* **Note:** This method is loosely based on
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* [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
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|
*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
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* @example
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*
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* _.isLength(3);
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* // => true
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*
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* _.isLength(Number.MIN_VALUE);
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* // => false
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*
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* _.isLength(Infinity);
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* // => false
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*
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* _.isLength('3');
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* // => false
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*/
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function isLength(value) {
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return typeof value == 'number' &&
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value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
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}
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/**
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* Checks if `value` is the
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* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
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* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an object, else `false`.
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* @example
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*
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* _.isObject({});
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* // => true
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*
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* _.isObject([1, 2, 3]);
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* // => true
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*
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* _.isObject(_.noop);
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* // => true
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*
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* _.isObject(null);
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* // => false
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*/
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function isObject(value) {
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var type = typeof value;
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return !!value && (type == 'object' || type == 'function');
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}
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/**
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* Checks if `value` is object-like. A value is object-like if it's not `null`
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* and has a `typeof` result of "object".
|
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Lang
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|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
|
|
* @example
|
|
*
|
|
* _.isObjectLike({});
|
|
* // => true
|
|
*
|
|
* _.isObjectLike([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* _.isObjectLike(_.noop);
|
|
* // => false
|
|
*
|
|
* _.isObjectLike(null);
|
|
* // => false
|
|
*/
|
|
function isObjectLike(value) {
|
|
return !!value && typeof value == 'object';
|
|
}
|
|
|
|
/**
|
|
* Assigns own enumerable string keyed properties of source objects to the
|
|
* destination object. Source objects are applied from left to right.
|
|
* Subsequent sources overwrite property assignments of previous sources.
|
|
*
|
|
* **Note:** This method mutates `object` and is loosely based on
|
|
* [`Object.assign`](https://mdn.io/Object/assign).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.10.0
|
|
* @category Object
|
|
* @param {Object} object The destination object.
|
|
* @param {...Object} [sources] The source objects.
|
|
* @returns {Object} Returns `object`.
|
|
* @see _.assignIn
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* }
|
|
*
|
|
* function Bar() {
|
|
* this.c = 3;
|
|
* }
|
|
*
|
|
* Foo.prototype.b = 2;
|
|
* Bar.prototype.d = 4;
|
|
*
|
|
* _.assign({ 'a': 0 }, new Foo, new Bar);
|
|
* // => { 'a': 1, 'c': 3 }
|
|
*/
|
|
var assign = createAssigner(function(object, source) {
|
|
if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
|
|
copyObject(source, keys(source), object);
|
|
return;
|
|
}
|
|
for (var key in source) {
|
|
if (hasOwnProperty.call(source, key)) {
|
|
assignValue(object, key, source[key]);
|
|
}
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Creates an array of the own enumerable property names of `object`.
|
|
*
|
|
* **Note:** Non-object values are coerced to objects. See the
|
|
* [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names.
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* this.b = 2;
|
|
* }
|
|
*
|
|
* Foo.prototype.c = 3;
|
|
*
|
|
* _.keys(new Foo);
|
|
* // => ['a', 'b'] (iteration order is not guaranteed)
|
|
*
|
|
* _.keys('hi');
|
|
* // => ['0', '1']
|
|
*/
|
|
function keys(object) {
|
|
return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
|
|
}
|
|
|
|
module.exports = assign;
|