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Why are preprocessor macros evil and what are the alternatives?
...e" in macros, say we have this:
#define safe_divide(res, x, y) if (y != 0) res = x/y;
and then
if (something) safe_divide(b, a, x);
else printf("Something is not set...");
It actually becomes completely the wrong thing....
Replacement: real functions.
3) Macros have no namespace
If we ...
HTML input file selection event not firing upon selecting the same file
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answered Aug 24 '12 at 4:04
Brian UstasBrian Ustas
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jquery ui Dialog: cannot call methods on dialog prior to initialization
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Appulus
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answered Nov 22 '12 at 21:36
Kneel-Before-ZODKnee...
Why can't an anonymous method be assigned to var?
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edited Feb 11 '11 at 7:03
answered Feb 11 '11 at 6:58
Er...
jQuery UI: Datepicker set year range dropdown to 100 years
Using the Datepicker the year drop down by default shows only 10 years. The user has to click the last year in order to get more years added.
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open() in Python does not create a file if it doesn't exist
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830
You should use open with the w+ mode:
file = open('myfile.dat', 'w+')
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Hide/Show Column in an HTML Table
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answered Jan 19 '09 at 14:16
bobincebobince
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How to count objects in PowerShell?
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206
This will get you count:
get-alias | measure
You can work with the result as with object:
$...
How do you debug a regex? [closed]
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answered Feb 27 '10 at 19:49
MickMick
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How do I check if a variable exists in a list in BASH
...tains() {
[[ $1 =~ (^|[[:space:]])$2($|[[:space:]]) ]] && exit(0) || exit(1)
}
to use it:
contains aList anItem
echo $? # 0： match, 1: failed
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