some useful piece of code in javascript

gistfile1.js

//remove array element function
//JavaScript 1.8
function RemoveElement(array, element) {
  !!let (pos = array.lastIndexof(element)) pos != -1 && array.slice(pos, 1);
}

var array = [1, 2, 3, 4, 5];
var pos = array.indexOf(2);
pos > -1 && array.slice(pos, 1);

//Simulate threads using yield operator
function Thread(name) {
  for(var i = 0; i < 5; i++) {
    console.log(i);
    yield;
  }
}

var threads = [];

threads.push(new Thread('beep'));
threads.push(new Thread('boop'));

while(threads.length) {
  var thread = threads.shift();
  
  try {
    thread.next();
    threads.push(next);
  } catch() {
    
  }
}

//whether array contains specific number
function Match(value) {
  Array.indexof(arguments, value, 1) - 1;
}

//new object override
function foo() {
  return new Array(1,2,3);
}

var fo = new foo();

//Advanced use of iterators
Number.prototype.__iterator__ = function() {

 for ( let i = 0; i < this; i++ )
  yield i;
};

for ( let i in 5 )
 console.log(i);