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How to compare variables to undefined, if I don’t know whether they exist? [duplicate]
... but how can you compare a value that you don’t know yet if it’s in memory?
5 Answers
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How to enable or disable an anchor using jQuery?
How to enable or disable an anchor using jQuery?
16 Answers
16
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What is size_t in C?
...fused with size_t in C. I know that it is returned by the sizeof operator. But what exactly is it? Is it a data type?
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How do you get assembler output from C/C++ source in gcc?
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Use the -S option to gcc (or g++).
gcc -S helloworld.c
This will run the preprocessor (cpp) over helloworld.c, perform the initial compilation and then stop before the assembler is run.
By default this will output a file helloworld.s. The output f...
Set UILabel line spacing
...edStringWithString did the same thing, but now that is being deprecated.
For historical reasons, here's my original answer:
Short answer: you can't. To change the spacing between lines of text, you will have to subclass UILabel and roll your own drawTextInRect, create multiple labels, or use a dif...
What is “:-!!” in C code?
...o fail the build.
The macro is somewhat misnamed; it should be something more like BUILD_BUG_OR_ZERO, rather than ...ON_ZERO. (There have been occasional discussions about whether this is a confusing name.)
You should read the expression like this:
sizeof(struct { int: -!!(e); }))
(e): Compute...
Which would be better for concurrent tasks on node.js? Fibers? Web-workers? or Threads?
...ike it a lot. But soon I found out that it lacked badly the ability to perform CPU-intensive tasks. So, I started googling and got these answers to solve the problem: Fibers, Webworkers and Threads (thread-a-gogo). Now which one to use is a confusion and one of them definitely needs to be used - aft...
PHP “php://input” vs $_POST
... understand is the benefits of using this vs the global method of $_POST or $_GET .
6 Answers
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Why would anybody use C over C++? [closed]
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Joel's answer is good for reasons you might have to use C, though there are a few others:
You must meet industry guidelines, which are easier to prove and test for in C.
You have tools to work with C, but not C++ (think not just about the compile...
How do I disable the “Press ENTER or type command to continue” prompt in Vim?
Is there any way to disable the "Press ENTER or type command to continue" prompt that appears after executing an external command?
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