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Why are hexadecimal numbers prefixed with 0x?
...er systems were decimal and octal — mainframes had 12, 24 or 36 bits per byte, which is nicely divisible by 3 = log2(8).
The BCPL language used the syntax 8 1234 for octal numbers. When Ken Thompson created B from BCPL, he used the 0 prefix instead. This is great because
an integer constant now...
How do I find the length of an array?
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@OliverCharlesworth also if you passed the array by value to another function and tried it there, it won't work, right? The question is why
– A_Matar
Feb 6 '15 at 18:55
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How to use RestSharp with async/await
...s RestSharp with async and await . I know there's been a recent update by Haack but I don't know how to use the new methods.
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Semicolon before self-invoking function? [duplicate]
...ole file. The statements inside the concatenated files should be separated by semicolons anyway to create valid JavaScript code.
– amoebe
Apr 3 '15 at 19:37
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What is the best way to prevent session hijacking?
...mited time physical access to a filesystem. Imagine a laptop left unlocked by a colleague rushing to the toilet, now all I need to do is to go to that laptop, install EditThisCookie plugin, grab his cookies at plus.google.com using EditThisCookie export feature and now I have his account. Time taken...
Specifically, what's dangerous about casting the result of malloc?
...on returning int, therefore converting the void* pointer actually returned by malloc to int and then to your pointer type due to the explicit cast. On some platforms, int and pointers may take up different numbers of bytes, so the type conversions may lead to data corruption.
Fortunately, modern co...
Abort makefile if variable not set
...ider it OK (defined):
recursive_empty = $(explicitly_empty)
As suggested by @VictorSergienko in the comments, a slightly different behavior may be desired:
$(if $(value $1) tests if the value is non-empty. It's sometimes OK if the variable is defined with an empty value. I'd use $(if $(filter ...
Tab key == 4 spaces and auto-indent after curly braces in Vim
... all
As graywh points out in the comments, smartindent has been replaced by cindent which "Works more cleverly", although still mainly for languages with C-like syntax:
:help C-indenting
share
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Can I replace groups in Java regex?
...static void main(String[] args) {
// replace with "%" what was matched by group 1
// input: aaa123ccc
// output: %123ccc
System.out.println(replaceGroup("([a-z]+)([0-9]+)([a-z]+)", "aaa123ccc", 1, "%"));
// replace with "!!!" what was matched the 4th time by the group 2
// ...
Check if UIColor is dark or bright?
I need to determine whether a selected UIColor (picked by the user) is dark or bright, so I can change the color of a line of text that sits on top of that color, for better readability.
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