JavaScript typedArray.indexOf() Method
Last Updated : 10 Feb, 2023
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The typedArray.indexOf() is an inbuilt function in JavaScript which is used to return the index of the element if found in the given typedArray otherwise it returns -1.
Syntax:
typedarray.indexOf(Element, Index);
Parameters: It accepts two parameter which are specified below-
- Element: It is the element which are being searched for index in the typedArray.
- Index: It is the index of the element in the typedArray form where searching should be started. Its default value is zero (0) and it is optional.
Return value: It returns the index of the element if found in the given typedArray otherwise it returns -1.
JavaScript code to show the working of this function:
Example 1:
// Creating some typedArrays
const A = new Uint8Array([ 1, 2, 3, 4, 5 ]);
const B = new Uint8Array([ 5, 10, 15, 20 ]);
const C = new Uint8Array([ 0, 2, 4, 6,, 8, 10 ]);
const D = new Uint8Array([ 1, 3, 5, 7, 9 ]);
// Calling indexOf() function
a = A.indexOf(2)
b = B.indexOf(15, 1)
c = C.indexOf(6)
d = D.indexOf(9, 1)
// Printing the index of the elements given
// as the parameter of the indexOf() function
console.log(a);
console.log(b);
console.log(c);
console.log(d);
Output:
1 2 3 4
Example 2:
// Creating some typedArrays
const A = new Uint8Array([ 1, 2, 3, 4, 5 ]);
const B = new Uint8Array([ 5, 10, 15, 20 ]);
const C = new Uint8Array([ 0, 2, 4, 6,, 8, 10 ]);
const D = new Uint8Array([ 1, 3, 5, 7, 9 ]);
// Calling include() function
a = A.indexOf(6)
b = B.indexOf(21, 1)
c = C.indexOf(6, 4)
d = D.indexOf(0)
// Printing the index of the elements given
// as the parameter of the indexOf() function
console.log(a);
console.log(b);
console.log(c);
console.log(d);
Output:
-1 -1 -1 -1
