function asyncFunction(value) {
return new Promise(resolve => {
setTimeout(() => {
console.log(value);
resolve(value);
}, 1000);
});
}
(async () => {
const results = await Promise.all([asyncFunction(1), asyncFunction(2), asyncFunction(3)]);
console.log(results);
})();
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What is the output?
Anonymous Quiz
50%
1, 2, 3, [1, 2, 3]
27%
[1, 2, 3], 1, 2, 3
15%
1, 1, 1, [1, 2, 3]
8%
1, 2, 3, [3, 3, 3]
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for (var i = 0; i < 3; i++) {
const log = () => {
console.log(i)
}
setTimeout(log, 100)
}
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var a = 1
function output () {
console.log(a)
var a = 2
console.log(a)
}
console.log(a)
output()
console.log(a)
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Angular 17 was released last week and a significant enhancement was support for a new syntax in templates that looks and feels more JavaScript-y.
DMYTRO MEZHENSKYI
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const asyncFunction = async () => {
const delay = (ms) => new Promise(resolve => setTimeout(resolve, ms));
const result = await Promise.race([delay(100), delay(500)]);
return result;
};
asyncFunction().then(value => console.log(value));
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Hey awesome community members! 🎉
Guess what? Our favorite programming language, JavaScript, just turned 28 on December 4th!🎂 🥳
Can you believe it's been powering the web for nearly three decades now?
Let's take a moment to appreciate the incredible journey of innovation and transformation it has brought to the world of coding. 🚀✨
Happy Birthday JavaScript
Guess what? Our favorite programming language, JavaScript, just turned 28 on December 4th!
Can you believe it's been powering the web for nearly three decades now?
Let's take a moment to appreciate the incredible journey of innovation and transformation it has brought to the world of coding. 🚀
Happy Birthday JavaScript
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function* fibonacci() {
let [prev, curr] = [0, 1];
while (true) {
[prev, curr] = [curr, prev + curr];
yield curr;
}
}
const fib = fibonacci();
console.log(fib.next().value);
console.log(fib.next().value);
console.log(fib.next().value);
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function deepFreeze(obj) {
Object.freeze(obj);
Object.getOwnPropertyNames(obj).forEach(prop => {
if (typeof obj[prop] === 'object' && !Object.isFrozen(obj[prop])) {
deepFreeze(obj[prop]);
}
});
return obj;
}
const data = { a: { b: { c: 1 } } };
const frozenData = deepFreeze(data);
frozenData.a.b.c = 2;
console.log(frozenData.a.b.c);
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Node.js TSC member Matteo has put together a handy site that visualizes the publicly available Node.js download statistics, partly as a way to help guide you as to which versions and which architectures need the most support. Notably, Node 18 has only just begun to pass Node 16 in popularity..
MATTEO COLLINA
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const obj = {};
const sym1 = Symbol('a');
const sym2 = Symbol('b');
obj[sym1] = 1;
obj[sym2] = 2;
console.log(Object.keys(obj));
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What is the output?
Anonymous Quiz
33%
[Symbol('a'), Symbol('b')]
12%
['b', 'a']
40%
['a', 'b']
15%
[]
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