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How to find a hash key containing a matching value
... I want to match the client_id? E.g. How to get the key for client_id == "2180" ?
10 Answers
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How do you round a floating point number in Perl?
...ntf() or printf() is usually the easiest
route.
printf("%.3f", 3.1415926535); # prints 3.142
The POSIX module (part of the standard Perl distribution) implements
ceil(), floor(), and a number of other mathematical and trigonometric
functions.
use POSIX;
$ceil = ceil(3.5); ...
Programmatically go back to the previous fragment in the backstack
...
12 Answers
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Best practices for SQL varchar column length [closed]
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244
No DBMS I know of has any "optimization" that will make a VARCHAR with a 2^n length perform be...
How do I find the caller of a method using stacktrace or reflection?
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12 Answers
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How to show line number when executing bash script
...or example, if your script reads:
$ cat script
foo=10
echo ${foo}
echo $((2 + 2))
Executing it thus would print line numbers:
$ PS4='Line ${LINENO}: ' bash -x script
Line 1: foo=10
Line 2: echo 10
10
Line 3: echo 4
4
http://wiki.bash-hackers.org/scripting/debuggingtips gives the ultimate PS4 t...
Pan & Zoom Image
...(ScaleTransform)image.RenderTransform;
double zoom = e.Delta > 0 ? .2 : -.2;
st.ScaleX += zoom;
st.ScaleY += zoom;
}
To handle the panning the first thing I did was to handle the MouseLeftButtonDown event on the image, to capture the mouse and to record it's location, I also store t...
How to implement “select all” check box in HTML?
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29 Answers
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Set selected item of spinner programmatically
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21 Answers
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Case insensitive regular expression without re.compile?
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edited Jun 26 '16 at 11:26
Mark Amery
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