JavaScript weakMap.set()方法用法示例

以下是示例weakMap.set()方法。

< script> function gfg() { const weakmap1 = new WeakMap(); const key1 = {}; const key2 = {}; const key3 = {}; weakmap1.set(key1, 'G' ); weakmap1.set(key2, 'F' ); weakmap1.set(key3, 'G' ); document.write(weakmap1.get(key1) +weakmap1.get(key2) +weakmap1.get(key3)); } gfg(); < /script>

输出如下： GFG
weakMap.set()是JavaScript中的内置函数, 用于为WeakMap对象设置具有特定键和值的新元素。
语法如下：

weakMap.set(key, value);

参数：它接受参数" key", 这是要设置为WeakMap对象的元素的键, 而参数" value"是要设置为WeakMap对象的元素的值。
返回值：它返回WeakMap对象。
例子：

Input: weakmap1.get(key1) Output: lsbin

JavaScript代码显示此功能的工作方式：
代码1：

< script> //creating WeakMap() object const weakmap1 = new WeakMap(); //Creating some keys const key1 = {}; const key2 = {}; //Setting key and value to the object. weakmap1.set(key1, 'lsbin' ); weakmap1.set(key2, 'gfg' ); //Returning the set values document.write(weakmap1.get(key1) + "< br> " ); document.write(weakmap1.get(key2)); < /script>

输出如下：

lsbin gfg

代码2：

< script> //creating WeakMap() object const weakmap1 = new WeakMap(); //Creating some keys const key1 = {}; const key2 = {}; const key3 = {}; const key4 = {}; const key5 = {}; const key6 = {}; //Setting key and value to the object. weakmap1.set(key1, 'lsbin' ); weakmap1.set(key2, 'gfg' ); weakmap1.set(key3, 'GfG is a cse portal' ); weakmap1.set(key4, '12345' ); weakmap1.set(key5, '@#$%' ); weakmap1.set(key6, '1.34' ); //Returning the set values document.write(weakmap1.get(key1) + "< br> " ); document.write(weakmap1.get(key2) + "< br> " ); document.write(weakmap1.get(key3) + "< br> " ); document.write(weakmap1.get(key4) + "< br> " ); document.write(weakmap1.get(key5) + "< br> " ); document.write(weakmap1.get(key6)); < /script>

输出如下：