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How to check whether dynamically attached event listener exists or not?
...s some sort of flag for you before you attach the event again. Here's an example of the idea.
// initial load
var attached = false;
// this will only execute code once
doSomething = function()
{
if (!attached)
{
attached = true;
//code
}
}
//attach your function with change event
window.o...
How to Remove ReadOnly Attribute on File Using PowerShell?
...e here? As for Keith's answer, he's using PSCX. Not everyone has those installed and that's not really a case of PowerShell v1 vs. v2.
– Joey
Apr 22 '11 at 9:28
add a comment
...
Understanding garbage collection in .NET
...'t finished executing yet. Which is very common, your Main() method for example will only ever stop executing just before your program terminates. Clearly you would not want any object references used inside that Main() method to live for the duration of the program, that would amount to a leak. ...
Is there any way to hide “-” (Delete) button while editing UITableView
...
Here is my complete solution, without indentation (0left align) of the cell!
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtInde...
What is this 'Lambda' everyone keeps speaking of?
...erplate code
Lambdas may be used to abstract away boilerplate code. For example loops. We're used to write for and while loops all day long. But this is code that does not be written. We could extract the code inside the loop, the most important part of the loop, and abstract away the rest:
for (v...
Create singleton using GCD's dispatch_once in Objective-C
...e being added with each new release.
Know it, love it.
And take it as an example of how paying attention to the low-level details can give you insights into powerful new ways to transform Objective-C.
Refer here: instancetype
+ (instancetype)sharedInstance
{
static dispatch_once_t once;
sta...
Is it good practice to use the xor operator for boolean checks? [closed]
...but not for Booleans so be careful). It's not always pretty though, for example (some != null) != (other != null) isn't very readable. You either have to extract the parts in explicit booleans, or extract the != in a separate method.
– ivant
Dec 22 '11 at 12...
Read the package name of an Android APK
...
@Campiador you can just type up until the pipe |, press enter and then just search the output for your desired parameter. Just remember that aapt needs to be in your path
– Patrick
Nov 14 ...
How can you determine a point is between two other points on a line segment?
..... (just making equating the slopes)
Point C (x3,y3) will lie between A & B if:
x3,y3 satisfies the above equation.
x3 lies between x1 & x2 and y3 lies between y1 & y2 (trivial check)
share
|
...
iPhone App 开发第一步：从零到真机调试HelloWorld - 更多技术 - 清泛网 - ...
...完成，再用darwin_snow_legacy.iso已无法引导系统，换成Rebel EFI.iso。至此大概完成Mac OSX系统的安装。下面是要用到的各种文件，此处不保证以下下载地址有效，若失效就自己找，刚才的链接帽子里有：
VMWare 8.0以及汉化包：http://...