大约有 46,000 项符合查询结果（耗时：0.0445秒） [XML]
What does the exclamation mark do before the function?
..., when we add the seemingly innocuous exclamation mark: !function foo() {} it turns it into an expression. It is now a function expression.
The ! alone doesn't invoke the function, of course, but we can now put () at the end: !function foo() {}() which has higher precedence than ! and instantly cal...
delete vs delete[] operators in C++
...r deallocates memory and calls the destructor for a single object created with new.
The delete [] operator deallocates memory and calls destructors for an array of objects created with new [].
Using delete on a pointer returned by new [] or delete [] on a pointer returned by new results in undefin...
Double not (!!) operator in PHP
...
It's not the "double not operator", it's the not operator applied twice. The right ! will result in a boolean, regardless of the operand. Then the left ! will negate that boolean.
This means that for any true value (numbers...
Tab Vs Space preferences in Vim
Vim is very accommodating when it comes to tab Vs. space preferences. As I understand it, the tabstop setting indicates the width of a tab character. The shiftwidth setting specifies how many columns to increment/decrement when using the << and >> commands, whereas the softtabst...
Determine the number of lines within a text file
Is there an easy way to programmatically determine the number of lines within a text file?
11 Answers
...
Is there a way to change the environment variables of another process in Unix?
...(gdb) call putenv ("env_var_name=env_var_value")
(gdb) detach
This is quite a nasty hack and should only be done in the context of a debugging scenario, of course.
share
|
improve this answer
...
What is the best way to stop people hacking the PHP-based highscore table of a Flash game
I'm talking about an action game with no upper score limit and no way to verify the score on the server by replaying moves etc.
...
How expensive is the lock statement?
I've been experimenting with multi threading and parallel processing and I needed a counter to do some basic counting and statistic analysis of the speed of the processing. To avoid problems with concurrent use of my class I've used a lock statement on a private variable in my class:
...
Div height 100% and expands to fit content
I have a div element on my page with its height set to 100%. The height of the body is also set to 100%. The inner div has a background and all that and is different from the body background. This works for making the div height 100% of the browser screen height, but the problem is I have content i...
Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]
Like most web developers, I occasionally like to look at the source of websites to see how their markup is built. Tools like Firebug and Chrome Developer Tools make it easy to inspect the code, but if I want to copy a specific section and play around with it locally, it would be a pain to copy all t...