This uses a proxy to make sure all keys/props of an object are always defined.
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let spec = {
get: (o, key) => {
return o[key] != null ? o[key] : o[key] = O();
},
set: (o, key, v) => {
o[key] = v;
}
};
let O [...]
let a = [1], b = [2], c = [3],
d = […a, …b, …c];
console.log(d);
// outputs: [1, 2, 3]
I have a set of ~100 pictograms that I use for personal notation. When I was actively working on Zeta. I created a few of these with equations:
See the Pen Zeta Pictograms by Zevan Rosser (@ZevanRosser) on CodePen.
You can read more about Zeta in this post.
I spam my facebook with images from my sketchbooks [...]
Creating a dictionary type object with ES6 Symbols is easy. Yes we have Maps and WeakMaps but this is still interesting for a variety of reasons… Being able to use objects as keys in another object (dictionary) has many great uses…. So how do you use Symbols like this?
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let a = { id: Symbol(’key’) },
[...]