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panuhorsmalahti/gist:b91b41d6802f63a2c346

Created November 4, 2014 20:40
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JavaScript signed zero example
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gistfile1.js
// JavaScript signed zero example.
// Note that +0 equals -0 in JavaScript.
var getPlusZero = () => +0;
var getNegativeZero = () => -0;
var isPlusZero = x => Math.atan2(0, x) === 0;
var isNegativeZero = x => Math.atan2(0, x) !== 0;
console.log(isPlusZero(getPlusZero()));
console.log(isPlusZero(getNegativeZero()));
console.log(isNegativeZero(getPlusZero()));
console.log(isNegativeZero(getNegativeZero()));
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