JavaScript typedArray.lastIndexOf() Method
Last Updated :
10 Feb, 2023
The typedArray.lastIndexOf() is an inbuilt function in JavaScript which is used to return the last index of the typedArray at which a given element is present otherwise it returns -1 if the element is not present.
Syntax:
typedArray.lastIndexOf(search_Element, from_Index])
Parameters: It accepts two parameters which are specified below:
- search_Element: It is the element whose last index is to be searched.
- from_Index: It is optional. It is the index up to which an element is to be searched and its default value is the length of the typedArray.
Return value: It returns the last index of the typedArray at which a given element is present otherwise it returns -1 if the element is not present.
Example 1:
javascript
var A = new Uint8Array([5, 10, 15, 15, 5, 20, 10]);
b = A.lastIndexOf(10);
c = A.lastIndexOf(5);
d = A.lastIndexOf(15);
e = A.lastIndexOf();
f = A.lastIndexOf(20);
g = A.lastIndexOf(25);
console.log(b);
console.log(c);
console.log(d);
console.log(e);
console.log(f);
console.log(g);
|
Output:
6
4
3
-1
5
-1
Example 2:
javascript
var A = new Uint8Array([5, 10, 15, 15, 5, 20, 10]);
b = A.lastIndexOf(10, 1);
c = A.lastIndexOf(5, 2);
d = A.lastIndexOf(15, 3);
e = A.lastIndexOf(15, 1);
f = A.lastIndexOf(20, 1);
g = A.lastIndexOf(25, 3);
console.log(b);
console.log(c);
console.log(d);
console.log(e);
console.log(f);
console.log(g);
|
Output:
1
0
3
-1
-1
-1
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