This question already has an answer here: How do I empty an array in JavaScript? 18 answers You need to clear array before pushing new value. Easy way to remove all exisiting values is to set length to 0 : saveSelectedValue : function (e) { var that = e.data.that, selectArray = that.filterSelectedCategories; selectArray.length = 0; // clear selectArray array selectArray.pus
这个问题在这里已经有了答案： 如何在JavaScript中清空数组？ 18个答案 在推送新值之前，您需要清除数组。 清除所有现有值的简单方法是将长度设置为0 ： saveSelectedValue : function (e) { var that = e.data.that, selectArray = that.filterSelectedCategories; selectArray.length = 0; // clear selectArray array selectArray.push($('.posts-filter-cat').val()); console.log(selectArray);
This question already has an answer here: How do I empty an array in JavaScript? 18 answers There are 2 options: 1) Modify the length property var wall = new Array(), wall.push(new Rectangle(30, 50, 10, 10)); wall.length = 0; 2) Use the splice() method wall.splice(0); Check this interesting article about the length property.
这个问题在这里已经有了答案： 如何在JavaScript中清空数组？ 18个答案 有2个选项： 1）修改length属性 var wall = new Array(), wall.push(new Rectangle(30, 50, 10, 10)); wall.length = 0; 2）使用splice()方法 wall.splice(0); 检查这篇关于length属性的有趣文章。
This question already has an answer here: How do I empty an array in JavaScript? 18 answers a.length = 0; 这就是你所需要的var a = [2,3,4,5,6]; console.log(a); a.length = 0; console.log(a); Do a.length = 0; if you don't want to lose references. Do a = []; if you want to lose references.
这个问题在这里已经有了答案： 如何在JavaScript中清空数组？ 18个答案 a.length = 0; 这就是你所需要的var a = [2,3,4,5,6]; console.log(a); a.length = 0; console.log(a); 做a.length = 0; 如果你不想失去引用。 做a = []; 如果你想失去参考。
This question already has an answer here: How do I empty an array in JavaScript? 18 answers 只需使用function clearit() { array = []; //or array = [""]; } 也许只是重做数组array = [""] 也可以使用： array.length = 0;
这个问题在这里已经有了答案： 如何在JavaScript中清空数组？ 18个答案 只需使用function clearit() { array = []; //or array = [""]; } 也许只是重做数组array = [""] 也可以使用： array.length = 0;
This question already has an answer here: Difference between Array.length = 0 and Array =[]? 3 answers How do I empty an array in JavaScript? 18 answers There is quite a big difference between just using [] and .length = 0 . If you use = [] you will assign a new reference to the variable, losing your reference to the original, by using .length = 0 you will clear the original array, leav
这个问题在这里已经有了答案： Array.length = 0和Array = []之间的区别？ 3个答案 如何在JavaScript中清空数组？ 18个答案 使用[]和.length = 0之间有很大的区别。 如果使用= []您将使用.length = 0为变量指定一个新的引用，从而失去对原始引用的引用，您将清除原始数组，并保持原始引用不变。 使用array = new Array(); 你将创建一个新的参考。 清除数组并保留引用的更好方法是： var array = [1,2,3,4,5]; wh
Possible Duplicate: how to empty an array in JavaScript Best way to deallocate an array of array in javascript I have an array of objects: var arr = [complexObj1, complexObj2]; If I want to clear the array and ensure that there is no memory leak, will the following do it? arr.length = 0; Or do I need to iterate through my array and call something like: complexObj.release(); or arr[0] =
可能重复： 如何在JavaScript中清空数组 在javascript中取消分配数组数组的最佳方式 我有一个对象数组： var arr = [complexObj1, complexObj2]; 如果我想清除数组并确保没有内存泄漏，下面会执行它吗？ arr.length = 0; 或者我需要迭代我的数组，并调用如下所示： complexObj.release(); or arr[0] = null; or delete arr[0]; ？ 如果数组由简单对象组成而没有引用其他方法或DOM元素，那么上述所有解决方案都足
Possible Duplicate: how to empty an array in JavaScript var jsonParent = []; This is my jsonArray I am pushing some elements in the array, but now I want to empty this array and remove all elements from it. 在节省内存和参考使用方面jsonParent.length = 0 If there are no other references to the same array then the easiest thing to do is just assign jsonParent to a new empty array: jsonParent
可能重复： 如何在JavaScript中清空数组 var jsonParent = []; 这是我的jsonArray我推动数组中的一些元素，但现在我想清空这个数组并从中删除所有元素。 在节省内存和参考使用方面jsonParent.length = 0 如果没有其他对同一数组的引用，那么最简单的事情就是将jsonParent分配给一个新的空数组： jsonParent = []; 但是如果你的代码对同一个数组实例有其他引用，那么这将使原始（填充）数组和jsonParent其他引用留下一个
Possible Duplicate: how to empty an array in JavaScript How to remove all items from jQuery array? I have array var myArray = []; , I want to clear all items in this array on every post back. Simplest thing to do is just myArray = []; again. edit — as pointed out in the comments, and in answers to other questions, another "simplest thing" is myArray.length = 0; and that h
可能重复： 如何在JavaScript中清空数组 如何从jQuery数组中删除所有项目？ 我有数组var myArray = []; ，我想在每个帖子后面清除此数组中的所有项目。 最简单的事情就是 myArray = []; 再次。 编辑 - 正如评论中指出的那样，并且在回答其他问题时，另一个“最简单的事情”是 myArray.length = 0; 并且具有保留相同数组对象的优点。 您可以使用数组长度删除myArray中的所有项目，这是常见模式。 尝试这个 var m
This question already has an answer here: How do I empty an array in JavaScript? 18 answers Nope, it's not. But drawnDivs.length = 0 should work. drawnDivs = []; It was answered in Stack Overflow question How do I empty an array in JavaScript?. Two examples from the answer: var A = ['some', 'values', 'here']; //Method 1 //(This was my original answer to the question) A = [];
这个问题在这里已经有了答案： 如何在JavaScript中清空数组？ 18个答案 不，不是的。 但是drawnDivs.length = 0应该可以工作。 drawnDivs = []; 它在Stack Overflow问题中得到了解答我如何在JavaScript中清空数组？ 答案的两个例子： var A = ['some', 'values', 'here']; //Method 1 //(This was my original answer to the question) A = []; // Method 2 (as suggested by Matthew Crumley) A.length = 0
based on: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/EventLoop stack frame is empty before next event is processed. So why in folowing snippet alert displays 1 instead of 0 because alert function should run before callback var a=0; var b={}; $(b).on("event", function (){ a++; }); $(b).trigger("event"); alert(a); http://jsfiddle.net/nxjhokL0/ Thanks! Let's ignor
基于：https：//developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/EventLoop 堆栈帧在处理下一个事件之前为空。 那么为什么在下面的片段警报显示1而不是0，因为警报函数应该在回调之前运行 var a=0; var b={}; $(b).on("event", function (){ a++; }); $(b).trigger("event"); alert(a); http://jsfiddle.net/nxjhokL0/ 谢谢！ 让我们忽略你在这里有jQuery事件的事实，而不是本地DOM事件，因为在他对这个问