JavaScript typedArray.indexOf() Method

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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:

javascript

// 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:

Example 2:

javascript

// 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

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