JavaScript | typedArray.every() with Examples

The typedArray.every() function is an inbuilt function in JavaScript which is used to test whether the elements present in the typedArray satisfies the condition provided by a function.
Syntax:

typedarray.every(callback)

Parameters: It takes callback function as parameter.
The callback is a function for testing the elements of the typedArray. This callback function takes three parameters that are specified below-

current_value: It is the current element being processed in the typedArray.

index: It is the index of the current element which is being processed in the typed array.

array: It is the typedArray.

Return value: It returns true if the function callback returns a true value for each and every array elements present in the typedArray otherwise returns false.

JavaScript code to show the working of this function:
Code #1:

<script> 
  
   // is_negative function is called to test the 
   // elements of the typedArray element. 
   function is_negative(current_value, index, array) 
   { 
    return current_value < 0; 
   } 
  
  // Creating a typedArray with some elements 
  const A = new Int8Array([ -5, -10, -15, -20, -25, -30 ]); 
  
  // Printing whether elements are satisfied by the 
  // functions or not 
  document.write(A.every(is_negative)); 
    
</script> 

Output:

true

Code #2:

<script> 
  
   // is_negative function is called to test the 
   // elements of the typedArray element. 
   function is_positive(current_value, index, array) 
   { 
    return current_value > 0; 
   } 
  
  // Creating a typedArray with some elements 
  const A = new Int8Array([ -5, -10, -15, -20, -25, -30 ]); 
  
  // Printing whether elements are satisfied by the 
  // functions or not 
  document.write(A.every(is_positive)); 
    
</script> 

Output:

false

JavaScript | typedArray.every() with Examples

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