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console.log(Array.from(someObject)) // [1, "Yolodog", "a"] | |
// con spread operator: | |
console.log([...someObject]) // [1, "Yolodog", "a"] | |
console.log(...someObject) // 1 "Yolodog" "a" |
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const someObject = { | |
a: 1, | |
perrito: 'Yolodog', | |
aChar: 'a', | |
} | |
someObject[Symbol.iterator] = function() { | |
let currentKey = 0; | |
const keys = Object.keys(this); | |
const { length } = keys; |
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function makeIterator(array) { | |
let nextIndex = 0; | |
return { | |
next: function() { | |
return nextIndex < array.length ? | |
{value: array[nextIndex++], done: false} : | |
{done: true}; | |
} | |
}; | |
} |
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const someArray = [2, 4, 8]; | |
for (let n of someArray) { console.log(n); } | |
// 2 | |
// 4 | |
// 8 |
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for (let char of 'yo!') { console.log(char); } | |
// y | |
// o | |
// ! |
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const someArray = [2, 4, 8]; | |
let someArraySquared = []; | |
for (let n of someArray) { | |
someArraySquared.push(n * n); | |
} | |
console.log(someArray, someArraySquared); |
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const someArray = [2, 4, 8]; | |
let someArraySquared = someArray.map(x => x * x); | |
console.log(someArray, someArraySquared); // [2, 4, 8], [4, 16, 64] |
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const someArray = [2, 4, 8]; | |
let someArraySquared = []; | |
for (let i = 0; i < someArray.length; i += 1) { | |
someArraySquared.push(someArray[i] * someArray[i]); | |
} | |
console.log(someArray, someArraySquared); // [2, 4, 8], [4, 16, 64] |
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/* VT100 terminal reset (<ESC>c) */ | |
console.log('\033c'); | |
/* numbers comparations */ | |
> '2' == 2 | |
true | |
> '2' === 2 |
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var html = (function () {/* | |
<!DOCTYPE html> | |
<html> | |
<body> | |
<h1>Hello, world!</h1> | |
</body> | |
</html> | |
*/}).toString().match(/[^]*\/\*([^]*)\*\/\}$/)[1]; |