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Syed Shahbaz Ahmed 2017-04-23 15:17:44 +02:00 • committed by GitHub
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1-js/05-data-types/07-map-set-weakmap-weakset/article.md
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@ -31,7 +31,7 @@ map.set('1', 'str1'); // a string key
map.set(1, 'num1'); // a numeric key map.set(1, 'num1'); // a numeric key
map.set(true, 'bool1'); // a boolean key map.set(true, 'bool1'); // a boolean key
// remember the regular Object? it would keys to string // remember the regular Object? it would convert keys to string
// Map keeps the type, so these two are different: // Map keeps the type, so these two are different:
alert( map.get(1) ); // 'num1' alert( map.get(1) ); // 'num1'
alert( map.get('1') ); // 'str1' alert( map.get('1') ); // 'str1'
@ -253,7 +253,7 @@ john = null;
Usually, properties of an object or elements of an array or another data structure are considered reachable and kept in memory while that data structure is in memory. Usually, properties of an object or elements of an array or another data structure are considered reachable and kept in memory while that data structure is in memory.
In a regular `Map`, if we store an object as the key or as a value -- does not matter, then it is stored there even if there are no more references to it. In a regular `Map`, it does not matter if we store an object as a key or as a value.It is kept in memory even if there are no more references to it.
For instance: For instance:
```js ```js