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Swapping two variable value without using third variable
... 0011
//So *x is 0011
Should this be used?
In general cases, no. The compiler will optimize away the temporary variable and given that swapping is a common procedure it should output the optimum machine code for your platform.
Take for example this quick test program written in C.
#include &...
Check status of one port on remote host [closed]
I need a command line that can check the port status on a remote host. I tried ping xxx.xxx.xxx.xxx:161 but it doesn't recognize the "host". I thought it was a "good" answer until I did the same command against a host I know has that port open. This is for a batch file on Windows that will chec...
std::wstring VS std::string
... glyphs (Klingon? Elvish?), while UTF-8 will spend from 1 to 4 bytes.
See http://en.wikipedia.org/wiki/UTF-8#Compared_to_UTF-16 for more info.
Conclusion
When I should use std::wstring over std::string?
On Linux? Almost never (§).
On Windows? Almost always (§).
On cross-platform code? Depends...
How do I display the current value of an Android Preference in the Preference summary?
This must come up very often.
34 Answers
34
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Map a network drive to be used by a service
...e. You can just create a link in the file system that any app can use. See http://en.wikipedia.org/wiki/NTFS_symbolic_link.
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How do you get the list of targets in a makefile?
...mpt to improve on @nobar's great approach as follows:
uses a more robust command to extract the target names, which hopefully prevents any false positives (and also does away with the unnecessary sh -c)
does not invariably target the makefile in the current directory; respects makefiles explicitly...
Vim clear last search highlighting
...
From http://twitter.com/jonbho/status/2194406821
" Clear highlighting on escape in normal mode
nnoremap <esc> :noh<return><esc>
nnoremap <esc>^[ <esc>^[
The second line is needed for mapping to the...
How to change the cursor into a hand when a user hovers over a list item?
...irksmode.org/css/user-interface/cursor.html#note (referenced in an earlier comment) states that hand must come after pointer. I recommend using just pointer - IE 5.5 is deader than IE 6.
– Iiridayn
Jul 10 '13 at 21:31
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How to show first commit by 'git log'?
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Get column index from column name in python pandas
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