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👾 add mdn links to Map and Set methods

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Lavrentiy Rubtsov 2022-09-07 01:42:51 +06:00 • committed by GitHub
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1-js/05-data-types/07-map-set/article.md
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@ -15,12 +15,12 @@ But that's not enough for real life. That's why `Map` and `Set` also exist.
Methods and properties are: Methods and properties are:
- `new Map()` -- creates the map. - `new Map()` -- creates the map.
- `map.set(key, value)` -- stores the value by the key. - [`map.set(key, value)`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/set) -- stores the value by the key.
- `map.get(key)` -- returns the value by the key, `undefined` if `key` doesn't exist in map. - [`map.get(key)`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get) -- returns the value by the key, `undefined` if `key` doesn't exist in map.
- `map.has(key)` -- returns `true` if the `key` exists, `false` otherwise. - [`map.has(key)`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/has) -- returns `true` if the `key` exists, `false` otherwise.
- `map.delete(key)` -- removes the value by the key. - [`map.delete(key)`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/delete) -- removes the value by the key.
- `map.clear()` -- removes everything from the map. - [`map.clear()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/clear) -- removes everything from the map.
- `map.size` -- returns the current element count. - [`map.size`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/size) -- returns the current element count.
For instance: For instance:
@ -105,9 +105,9 @@ map.set('1', 'str1')
For looping over a `map`, there are 3 methods: For looping over a `map`, there are 3 methods:
- `map.keys()` -- returns an iterable for keys, - [`map.keys()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/keys) -- returns an iterable for keys,
- `map.values()` -- returns an iterable for values, - [`map.values()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/values) -- returns an iterable for values,
- `map.entries()` -- returns an iterable for entries `[key, value]`, it's used by default in `for..of`. - [`map.entries()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/entries) -- returns an iterable for entries `[key, value]`, it's used by default in `for..of`.
For instance: For instance: