What is the output?
Anonymous Quiz
11%
['a', 'b', 'c', 'e']
52%
['a', 'bcd', 'e']
8%
['a', 'b', 'c', 'd']
29%
["a", "b", "c", "d", "e"]
👍8🤩3🤔1
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❤3👍1🔥1
CHALLENGE
const array = [1, 2, [3, 4, [5, 6]]];
const result = array.flat(2).map(n => n * 2);
console.log(result);
🔥5👍4🤩1
What is the output?
Anonymous Quiz
15%
[2, 4, 3, 4, 5, 6]
22%
[1, 2, 6, 8, 10, 12]
49%
[2, 4, 6, 8, 10, 12]
14%
[2, 4, [6, 8, [10, 12]]]
👍9🤣4❤2🔥1🤩1
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Soon, all websites will start using WebAI because the model will run on your computer, and they won't need to spend resources on it.
Narek Hakobyan
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👍20🤔12🔥9❤4🤣4
CHALLENGE
const array = [1, 2, [3, 4, [5, 6]]];
const result = array.flat(2).map(n => n * 2);
console.log(result);
👍3
🤣21🤔14👍9🔥4🤩1
A modern, configurable, and fast template engine promising “the power of Nunjucks” and “the simplicity of EJS”. There’s an online playground if you want to see it in action.
Ben Gubler
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👍4❤2🔥2
CHALLENGE
const array = [1, 2, 3, 4, 5];
const [first, ...rest] = array;
const modified = rest.map((n, i) => i % 2 === 0 ? n * 2 : n);
console.log(first, modified);
❤9👍4
What is the output?
Anonymous Quiz
23%
1, [2, 3, 8, 5]
18%
1, [4, 6, 8]
20%
1, [4, 8]
40%
1, [4, 3, 8, 5]
👍9
CHALLENGE
const obj = { a: 1, b: 2 };
const proxy = new Proxy(obj, {
get(target, prop) {
return prop in target ? target[prop] : 0;
}
});
console.log(proxy.a, proxy.b, proxy.c);
❤11🔥3👍2
What is the output?
Anonymous Quiz
18%
undefined, 2, 0
21%
1, undefined, 0
40%
1, 2, 0
20%
1, 2, undefined
❤6
You can 'cancel' XHR and fetch requests, but can you cancel regular promises? Currently, no, but Zachary looks into doing the next best thing: telling a promise the game's up, and discarding/ignoring its eventual results.
Zachary Lee
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👍7
CHALLENGE
const array = [1, 2, 3];
array[10] = 4;
console.log(array.length);
console.log(array.includes(undefined));
👍21🤔12❤11🤣6
A slider control based visualization you can code with simple formulas. We last linked to this a few years ago, but it’s still a fun way to do some quick, visual JS math experimentation. Tixy.land is along similar lines, but based on a 2D grid.
blinry
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❤8👍4🔥1
CHALLENGE
const obj = {
a: 1,
b() {
return this.a;
}
};
const b = obj.b;
console.log(b.call({ a: 2 }));
👍20❤5🤩2
👍2
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🔥4❤3🤩3