prepend()
The prepend method adds an item to the beginning of the collection:
const collection = collect([1, 2, 3, 4, 5]);
collection.prepend(0);
collection.all();
// [0, 1, 2, 3, 4, 5]
You may also pass a second argument to set the key of the prepended item:
Pro tip: Order of properties in objects is not guaranteed in JavaScript; When calling prepend with a key, the Collection uses the underlying
put
method behind the scenes. This is only supported so that collect.js have the same api as Laravel Collections.
const collection = collect({
product: 'iPhone 6s',
});
collection.prepend('Apple', 'brand');
collection.all();
// {
// brand: 'Apple',
// product: 'iPhone 6s',
// }