8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
17 lines
587 B
Markdown
17 lines
587 B
Markdown
### forOwnRight
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Iterates over all own properties of an object in reverse, running a callback for each one.
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Use `Object.keys(obj)` to get all the properties of the object, `Array.prototype.reverse()` to reverse their order and `Array.prototype.forEach()` to run the provided function for each key-value pair. The callback receives three arguments - the value, the key and the object.
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```js
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const forOwnRight = (obj, fn) =>
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Object.keys(obj)
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.reverse()
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.forEach(key => fn(obj[key], key, obj));
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```
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```js
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forOwnRight({ foo: 'bar', a: 1 }, v => console.log(v)); // 1, 'bar'
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```
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