Map
suggest changeSyntax
- new Map([iterable])
- map.set(key, value)
- map.get(key)
- map.size
- map.clear()
- map.delete(key)
- map.entries()
- map.keys()
- map.values()
- map.forEach(callback[, thisArg])
Parameters
| Parameter | Details |
|---|---|
| iterable | Any iterable object (for example an array) containing [key, value] pairs. |
| key | The key of an element. |
| value | The value assigned to the key. |
| callback | Callback function called with three parameters: value, key, and the map. |
| thisArg | Value which will be used as this when executing callback. |
Remarks
In Maps NaN is considered to be the same as NaN, even though NaN !== NaN. For example:
const map = new Map([[NaN, true]]);
console.log(map.get(NaN)); // true
Removing an element from a map
Checking if a key exists in a map
Getting the number of elements of a map
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