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Javascript匿名函数(Javascript anonymous functions)

我有以下代码:

for (var i=0; i < 20; i++) {
    var itemButton = $('<button />').click(function(){ alert('Hello'); }).append('Hello');
    $('#container').append(itemButton);                            
}

我创建了许多按钮,每个按钮都有一个onclick功能。 然后我使用$('#shopSearchTopBar').empty();清除$('#shopSearchTopBar').empty(); 并再次创建按钮。

我的问题是:这可能是内存泄漏吗? 当我在#container上调用.empty()方法或内存被释放时,Javascript是否释放了我第一次创建的匿名函数所使用的内存,我可以安全地添加这20个新按钮,每个按钮都有自己的新匿名函数?


I have the following code:

for (var i=0; i < 20; i++) {
    var itemButton = $('<button />').click(function(){ alert('Hello'); }).append('Hello');
    $('#container').append(itemButton);                            
}

Where i create lots of buttons each with a onclick function. Then i clear the #container using $('#shopSearchTopBar').empty(); and create the buttons again.

My question is: Is this a possible memory leak? Does Javascript frees the memory used for those anonymous functions i created the first time when i call the .empty() method on the #container or the memory gets freed an i can safely add those 20 new buttons each with his own new anonymous function?


原文:https://stackoverflow.com/questions/4879686
更新时间:2024-02-02 22:02

最满意答案

看来这应该做你需要的。

if ([dateToCompare laterDate:pastSevenDays] == dateToCompare)
{
    // dateToCompare is less than 7 days ago
}
else if ([dateToCompare laterDate:pastFourteenDays] == dateToCompare)
{
    // dateToCompare is more than 7 days ago, but less than 14 days ago
}
else if ([dateToCompare laterDate:pastThirtyDays] == dateToCompare)
{
    // dateToCompare is more than 14 days ago, but less than 30 days ago
}

It seems like this should do what you need.

if ([dateToCompare laterDate:pastSevenDays] == dateToCompare)
{
    // dateToCompare is less than 7 days ago
}
else if ([dateToCompare laterDate:pastFourteenDays] == dateToCompare)
{
    // dateToCompare is more than 7 days ago, but less than 14 days ago
}
else if ([dateToCompare laterDate:pastThirtyDays] == dateToCompare)
{
    // dateToCompare is more than 14 days ago, but less than 30 days ago
}

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