The lastIndexOf()
method returns the last index at which a given element can be found in the typed array, or -1 if it is not present. The typed array is searched backwards, starting at fromIndex
. This method has the same algorithm as Array.prototype.lastIndexOf()
. TypedArray is one of the typed array types here.
typedarray.lastIndexOf(searchElement[, fromIndex = typedarray.length])
searchElement
fromIndex
The last index of the element in the array; -1
if not found.
lastIndexOf
compares searchElement
to elements of the typed array using strict equality (the same method used by the ===, or triple-equals, operator).
var uint8 = new Uint8Array([2, 5, 9, 2]); uint8.lastIndexOf(2); // 3 uint8.lastIndexOf(7); // -1 uint8.lastIndexOf(2, 3); // 3 uint8.lastIndexOf(2, 2); // 0 uint8.lastIndexOf(2, -2); // 0 uint8.lastIndexOf(2, -1); // 3
Specification |
---|
ECMAScript (ECMA-262) The definition of 'TypedArray.prototype.lastIndexOf' in that specification. |
Desktop | ||||||
---|---|---|---|---|---|---|
lastIndexOf |
45 | 14 | 37
|
No | 32 | 10 |
Mobile | ||||||
---|---|---|---|---|---|---|
lastIndexOf |
45 | 45 | 37
|
32 | 10 | 5.0 |
Server | |
---|---|
lastIndexOf |
4.0.0 |
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https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/lastIndexOf