The fill()
method fills all the elements of a typed array from a start index to an end index with a static value. This method has the same algorithm as Array.prototype.fill()
. TypedArray is one of the typed array types here.
typedarray.fill(value[, start = 0[, end = this.length]])
value
start
end
The modified array.
The elements interval to fill is [start
, end
).
The fill
method takes up to three arguments value
, start
and end
. The start
and end
arguments are optional with default values of 0
and the length
of the this
object.
If start
is negative, it is treated as length+start
where length
is the length of the array. If end
is negative, it is treated as length+end
.
Since there is no global object with the name TypedArray, polyfilling must be done on an "as needed" basis. Use the following "polyfill" along with the Array.prototype.fill()
polyfill.
// https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill if (!Uint8Array.prototype.fill) { Uint8Array.prototype.fill = Array.prototype.fill; }
new Uint8Array([1, 2, 3]).fill(4); // Uint8Array [4, 4, 4] new Uint8Array([1, 2, 3]).fill(4, 1); // Uint8Array [1, 4, 4] new Uint8Array([1, 2, 3]).fill(4, 1, 2); // Uint8Array [1, 4, 3] new Uint8Array([1, 2, 3]).fill(4, 1, 1); // Uint8Array [1, 2, 3] new Uint8Array([1, 2, 3]).fill(4, -3, -2); // Uint8Array [4, 2, 3]
Specification |
---|
ECMAScript (ECMA-262) The definition of 'TypedArray.prototype.fill' in that specification. |
Desktop | ||||||
---|---|---|---|---|---|---|
fill |
45 | 14 | 37 | No | 36 | 9.1 |
Mobile | ||||||
---|---|---|---|---|---|---|
fill |
No | 45 | 37 | No | 9.3 | 5.0 |
Server | |
---|---|
fill |
4.0.0 |
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https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/fill