Javascript Uint8Array includes()

Introduction

The Javascript Uint8Array includes() method checks whether a typed array includes a certain element.

It returns true or false.

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

Uint8Array.includes(searchElement[, fromIndex]);
Parameter Optional Meaning
searchElementRequired The element to search for.
fromIndexOptional The position to begin searching for searchElement; defaults to 0.
var uint8 = new Uint8Array([1,2,3]);
let a = uint8.includes(2);     // true
console.log(a);//from   w  w  w .j a  v  a  2 s  .  c om
a = uint8.includes(4);     // false
console.log(a);
a = uint8.includes(3, 3);  // false
console.log(a);

NaN handling 

let a = new Uint8Array([NaN]).includes(NaN); // false, since the NaN passed to the constructor gets converted to 0
console.log(a);//from w w w.j a v a 2  s  . co m
a = new Float32Array([NaN]).includes(NaN); // true;
console.log(a);
a = new Float64Array([NaN]).includes(NaN); // true;
console.log(a);



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