CHALLENGE
const data = { a: 1, b: 2, c: 3 };
const { a, ...rest } = data;
const newObj = { ...rest, a, d: 4 };
const arr = [1, 2, 3, 4, 5];
const [first, , third, ...remaining] = arr;
const result = [...remaining, third, first];
console.log(newObj);
console.log(result);A fantastic walkthrough of Chrome’s origins and its evolution over the years. Addy looks at key milestones (multi-process architecture for example), security, its steps into the world of AI, and more.
Addy Osmani
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1❤6👍2🔥2🤩2
CHALLENGE
console.log('1');
setTimeout(() => console.log('2'), 0);
Promise.resolve().then(() => console.log('3'));
queueMicrotask(() => console.log('4'));
setTimeout(() => console.log('5'), 0);
Promise.resolve().then(() => {
console.log('6');
return Promise.resolve();
}).then(() => console.log('7'));
console.log('8');❤6🔥3👍1
What is the output?
Anonymous Quiz
39%
1 8 3 4 6 7 2 5
29%
1 8 4 3 6 2 7 5
16%
1 8 3 6 4 7 2 5
16%
1 2 3 4 5 6 7 8
A project originally spawned from the BBC’s R&D department, Peaks renders audio waveforms to a canvas element and allows scrolling, zooming, and the sort of things you might otherwise see in an audio editor. LGPL licensed.
Chris Needham et al.
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CHALLENGE
class CustomError extends Error {
constructor(message) {
super(message);
this.name = 'CustomError';
}
}
try {
try {
throw new CustomError('inner error');
} catch (e) {
console.log(e.name);
throw new Error('outer error');
}
} catch (e) {
console.log(e.message);
console.log(e instanceof CustomError);
}❤1
What is the output?
Anonymous Quiz
43%
CustomError outer error false
33%
CustomError inner error true
17%
Error outer error false
7%
CustomError outer error true
❤3🔥1
🎨 Eyecons is a VS Code icon theme that automatically adapts the color of icons to fit your editor's main theme – well, from this list anyway.
👍7❤1🔥1
CHALLENGE
const original = {
name: 'Sarah',
scores: [85, 92, 78],
details: {
age: 25,
city: 'Portland'
}
};
const copy1 = { ...original };
const copy2 = JSON.parse(JSON.stringify(original));
copy1.name = 'Emma';
copy1.scores.push(95);
copy1.details.age = 30;
console.log(original.name, original.scores.length, original.details.age);❤2🔥2
❤4