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jaquinocode/getDefault.js

Last active December 25, 2023 19:46
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setdefault but for JavaScript. setdefault is a function in Python which can be used to get around using a defaultdict. Here I recreate the behavior in JavaScript.
Raw
getDefault.js
const getDefault = (o, key, defaultVal) => key in o ? o[key] : o[key] = defaultVal
// Prototype version of above. Allows for usage: o.getDefault(key, def)
Object.defineProperty(Object.prototype, "getDefault", {
value: function(key, defaultVal) {
return key in this ? this[key] : this[key] = defaultVal
}
})
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