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Find Odd Number
The "trick" is to binary AND a value with 1.
Any odd number must have the first bit set to 1.
var foo = 7;
if( foo & 1 ) { // true }
Using a bitwise AND has a better performance in almost all platforms / browsers.
for(var loop = 0; loop < 10; loop++) {
if( loop & 1 ) {
console.log('I am ', loop, ' and I am odd!');
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