Array.prototype.shift()

method shift() menghapus elemen pertama pada array dan mengembalikan elemen tersebut. Method ini mengubah panjang (jumlah elemen) array.

Sintaks

arr.shift()

Deskripsi

Method shift menghapus elemen pada index 0 dan menggeser nilai index setelahnya, kemudian mengembalikan nilai yang dihapus. Jika properti length bernilai 0, maka akan mengembalikan nilai undefined.

shift adalah desain generic; method ini dapat berupa called atau applied pada objek yag menyerupai array. Objek yang tidak memiliki properti length akan dianggap terakhir dalam urutan, properti numerik berbasis zero mungkin tidak memiliki makna yang berarti.

Contoh

Menghapus Elemen dari sebuah Array

Kode berikut menampilkan array myFish sebelum dan sesudah menghapus elemen pertama. Juga menampilkan elemen yang dihapus:

var myFish = ['angel', 'clown', 'mandarin', 'surgeon'];

console.log('myFish sebelum: ' + myFish);
// myFish sebelum: angel,clown,mandarin,surgeon

var shifted = myFish.shift(); 

console.log('myFish sesudah: ' + myFish); 
// myFish sesudah: clown,mandarin,surgeon

console.log('Elemen yang dihapus: ' + shifted); 
// Elemen yang dihapus: angel

Spesifikasi

Spesifikasi Status Comment
ECMAScript 3rd Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.2.
ECMAScript 5.1 (ECMA-262)
The definition of 'Array.prototype.shift' in that specification.		 Standard  
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Array.prototype.shift' in that specification.		 Standard  
ECMAScript Latest Draft (ECMA-262)
The definition of 'Array.prototype.shift' in that specification.		 Draft  

Kompabiltas browser

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 1.0 1.0 (1.7 or earlier) 5.5 (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

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