Javascript Uint8ClampedArray some()

Introduction

The Javascript Uint8ClampedArray some() method if some element in the typed array passes the test implemented by the provided function.

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

Uint8ClampedArray.some(callback[, thisArg])
Parameter
 Optional
 Meaning
callback




 Required




 Function to test for each element
Taking three arguments:
currentValue - the current element being processed.
index - the index of the current element being processed.
array - the typed array itself.
thisArg
 Optional
 Value to use as this when executing callback.

It returns true if the callback function returns a truthy value for any array element; otherwise, false.

Testing size of all typed array elements

The following example tests whether any element in the typed array is bigger than 10. 

function isBiggerThan10(element, index, array) {
  return element > 10;
}
let a = new Uint8ClampedArray([2, 5, 8, 1, 4]).some(isBiggerThan10); // false
console.log(a);
a = new Uint8ClampedArray([12, 5, 8, 1, 4]).some(isBiggerThan10); // true
console.log(a);

Testing typed array elements using arrow functions

Arrow functions provide a shorter syntax for the same test. 

let a = new Uint8ClampedArray([2, 5, 8, 1, 4]).some(elem => elem > 10); // false
console.log(a);//from  w w w.ja  v a2s .co m
a = new Uint8ClampedArray([12, 5, 8, 1, 4]).some(elem => elem > 10); // true
console.log(a);



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