Javascript Int32Array filter()

Introduction

The Javascript Int32Array filter() method filters the typed array by the provided function.

This method works the same as Array.prototype.filter(). 

Int32Array.filter(callback[, thisArg])
Parameter
 Optional
 Meaning
callback


 Required


 Function to test each element of the typed array.
Taking three arguments (element, index, Int32Array).
Return true to keep the element, false otherwise.
thisArg
 Optional
 Value to use as this when executing callback.

Filtering out all small values

The following example uses filter() to create a filtered typed array that has all elements with values less than 10 removed. 

function isBigEnough(element, index, array) {
  return element >= 10;
}
let a = new Int32Array([12, 5, 8, 130, 44]).filter(isBigEnough); 
console.log(a);//ww  w  . j a v a  2 s.  co  m

Filtering typed array elements using arrow functions

Arrow functions provide a shorter syntax for the same test. 

let a = new Int32Array([12, 5, 8, 130, 44]).filter(elem => elem >= 10); 
console.log(a);



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