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Convert values to boolean in JS
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// In JS `!!` can be used to convert any value to a boolean | |
// Similar to using the Boolean() function | |
(function() { | |
var foo = 'foo'; | |
console.log(typeof foo); | |
var bool = !!foo; | |
console.log(typeof bool); | |
console.log(bool); | |
})() | |
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean | |
// http://brianflove.com/2014/09/02/whats-the-double-exclamation-mark-for-in-javascript/ | |
// https://stackoverflow.com/questions/784929/what-is-the-not-not-operator-in-javascript#answer-15035152 | |
// https://stackoverflow.com/questions/29312123/how-does-the-double-exclamation-work-in-javascript#answer-29312197 | |
// https://medium.com/@pddivine/javascript-bang-bang-i-shot-you-down-use-of-double-bangs-in-javascript-7c9d94446054 |
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