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37 lines
772 B
37 lines
772 B
'use strict';
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var _require = require('../helpers/is'),
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isFunction = _require.isFunction;
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module.exports = function first(fn, defaultValue) {
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if (isFunction(fn)) {
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for (var i = 0, length = this.items.length; i < length; i += 1) {
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var item = this.items[i];
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if (fn(item)) {
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return item;
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}
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}
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if (isFunction(defaultValue)) {
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return defaultValue();
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}
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return defaultValue;
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}
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if (Array.isArray(this.items) && this.items.length || Object.keys(this.items).length) {
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if (Array.isArray(this.items)) {
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return this.items[0];
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}
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var firstKey = Object.keys(this.items)[0];
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return this.items[firstKey];
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}
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if (isFunction(defaultValue)) {
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return defaultValue();
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}
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return defaultValue;
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};
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