CHALLENGE
const weakMap = new WeakMap();
const obj = {};
(function() {
const obj1 = { name: 'inner' };
weakMap.set(obj1, 'inner value');
})();
const result = weakMap.get(obj);
console.log(result);
๐8
๐14โค4๐ค4๐ฅ1
If you missed the Google I/O Angular session, you missed not only the latest updates on Angular but also the Generative Art Gallery demo which I had so much fun building. The demo has all of my favorite technologies, including AI, Angular and WebXR. It also was a very pleasant developer experience. Let me tell you why!
Ayลegรผl Yรถnet
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CHALLENGE
const weakMap = new WeakMap();
const obj = {};
const gen = (function* () {
yield 'value1';
yield 'value2';
})();
weakMap.set(obj, gen.next().value);
console.log(weakMap.get(obj));
console.log(gen.next().value);
๐4
What is the output?
Anonymous Quiz
17%
Error
27%
"valie1", undefined
46%
"value1", "value2"
10%
"value2", "value2"
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I've always wanted to create a video series to share my experiences and work style as a remote software engineer. I finally started this journey and am excited to make more videos like this...
nairi
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CHALLENGE
const weakMap = new WeakMap();
const gen = (function* () {
yield { key: 'value1' };
yield { key: 'value2' };
})();
const obj1 = gen.next().value;
const obj2 = gen.next().value;
weakMap.set(obj1, 'stored value1');
weakMap.set(obj2, 'stored value2');
const result = [...gen].map(obj => weakMap.get(obj));
console.log(result);
๐7โค5๐ฅ3๐คฉ2
What is the output?
Anonymous Quiz
17%
[undefined, undefined]
17%
[]
58%
["stored value1", "stored value2"]
9%
[null, null]
๐10๐ฅ6๐ค5โค4
We often feature ECMAScript proposals that are in their later stages, but how about a brand new one you could get involved with? This one proposes an interesting additional bit of language syntax (`?=`) that returns a
[error, value] tuple from an assignment.Arthur Fiorette
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CHALLENGE
const weakMap = new WeakMap();
const array = [{}, {}];
array.forEach(obj => weakMap.set(obj, obj));
const result = array.map(obj => weakMap.get(obj) === obj);
console.log(result);
2๐8
๐11๐ค5โค4๐ฅ1
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Sponsored by Bryntum ๐ฎโโ๏ธ
World Class Web Components
โ CHALLENGE
World Class Web Components
const weakMap = new WeakMap();
const obj = {};
(function() {
const internalObj = {};
weakMap.set(internalObj, 'hidden');
obj.ref = internalObj;
})();
delete obj.ref;
const result = weakMap.has(obj.ref);
console.log(result);
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Sponsored by Bryntum ๐ฎโโ๏ธ
World Class Web Components
๐ฅ Google takes its biggest L ever... now a convicted monopolist
Fireship
World Class Web Components
Fireship
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Sponsored by Bryntum ๐ฎโโ๏ธ
World Class Web Components
โ CHALLENGE
World Class Web Components
const weakMap = new WeakMap();
const array = [1, 2, 3];
const obj = {};
weakMap.set(obj, array);
const result = weakMap.get(obj).reduce((acc, val) => acc + val);
console.log(result);
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Sponsored by Bryntum ๐ฎโโ๏ธ
World Class Web Components
โ CHALLENGE
World Class Web Components
const weakMap = new WeakMap();
const obj1 = {};
const obj2 = { key: 'value' };
weakMap.set(obj1, obj2);
const result = weakMap.get(obj1).key.split('').reverse().join('');
console.log(result);
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Sponsored by Bryntum ๐ฎโโ๏ธ
World Class Web Components
๐ Volta 2.0: Install and Run JavaScript Tools Quickly
A long-standing Rust powered tool for installing and switching JavaScript related tools (like Node, TypeScript, Yarn, etc.) โฆ โno matter the package manager, Node runtime, or OS.โ GitHub repo.
Volta
World Class Web Components
A long-standing Rust powered tool for installing and switching JavaScript related tools (like Node, TypeScript, Yarn, etc.) โฆ โno matter the package manager, Node runtime, or OS.โ GitHub repo.
Volta
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