大约有 47,000 项符合查询结果（耗时：0.0766秒） [XML]
What are the best practices for catching and re-throwing exceptions?
... do something meaningful.
"Something meaningful" might be one of these:
Handling the exception
The most obvious meaningful action is to handle the exception, e.g. by displaying an error message and aborting the operation:
try {
$connect = new CONNECT($db, $user, $password, $driver, $host);
}...
Difference between a Structure and a Union
Is there any good example to give the difference between a struct and a union ?
Basically I know that struct uses all the memory of its member and union uses the largest members memory space. Is there any other OS level difference?
...
Do you need to dispose of objects and set them to null?
Do you need to dispose of objects and set them to null, or will the garbage collector clean them up when they go out of scope?
...
Can you control how an SVG's stroke-width is drawn?
...owser-based SVG application. Within this app, various shapes can be styled and positioned by the user, including rectangles.
...
Why use Object.prototype.hasOwnProperty.call(myObj, prop) instead of myObj.hasOwnProperty(prop)?
If I understand correctly, each and every object in Javascript inherits from the Object prototype, which means that each and every object in Javascript has access to the hasOwnProperty function through its prototype chain.
...
How to use Git properly with Xcode?
I have been an iphone developer for a while, and I have recently been including git in my workflow. I have used git settings found on http://shanesbrain.net/2008/7/9/using-xcode-with-git for my workflow so far.
...
What are enums and why are they useful?
Today I was browsing through some questions on this site and I found a mention of an enum being used in singleton pattern about purported thread safety benefits to such solution.
...
Convert NSArray to NSString in Objective-C
... @TechZen - no, because [array description] inserts newlines and the outer parentheses.
– Dave DeLong
Dec 1 '09 at 21:05
...
Tools for JPEG optimization? [closed]
Do you know of any tools (preferrably command-line) to automatically and losslessly optimize JPEGs that I could integrate into our build environment? For PNGs I'm currently using PNGOUT , and it generally saves around 40% bandwidth/image size.
...
Difference between validate(), revalidate() and invalidate() in Swing GUI
...idate() marks the container as invalid. Means the content is somehow wrong and must be re-laid out. But it's just a kind of mark/flag. It's possible that multiple invalid containers must be refreshed later.
validate() performs relayout. It means invalid content is asked for all the sizes and all th...