Set.prototype.delete()
delete()
方法會一個 Set
物件中移除指定元素。
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語法
mySet.delete(value);
參數'
value
- 要從
Set
物件中移除的值。
回傳值
true
如果成功從 Set
物件中移除;反之 false
。
範例
使用 delete
方法
var mySet = new Set();
mySet.add('foo');
mySet.delete('bar'); // Returns false. No "bar" element found to be deleted.
mySet.delete('foo'); // Returns true. Successfully removed.
mySet.has('foo'); // Returns false. The "foo" element is no longer present.
下方展示了如何從一個 Set 中移除物件。
var setObj = new Set(); // Create a New Set.
setObj.add({x: 10, y: 20}); // Add object in the set.
setObj.add({x: 20, y: 30}); // Add object in the set.
// Delete any point with `x > 10`.
setObj.forEach(function(point){
if(point.x > 10){
setObj.delete(point)
}
})
規範
規範 | 狀態 | 註 |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Set.prototype.delete' in that specification. |
Standard | Initial definition. |
ECMAScript (ECMA-262) The definition of 'Set.prototype.delete' in that specification. |
Living Standard |
瀏覽器相容性
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