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Why number 9 in kill -9 command in unix? [closed]
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Back in the day (by which I mean 4.xBSD or so) you couldn't use the mnemonics with the shell command, which is why the number 9 is written into an awful lot of old dusty-deck shell scripts.
– zwol
Mar 30 '12 at 23:33
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'printf' vs. 'cout' in C++
... instead of just printing them. For example, printing of something like 0x0424 is just crazy. This is caused by std::cout mixing state and actual values. I never saw a language where something like std::setfill would be a type (other than C++, of course). printf clearly separates arguments and actua...
HTML select form with option to enter custom value
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245
HTML5 has a built-in combo box. You create a text input and a datalist. Then you add a list att...
Semi-transparent color layer over background-image?
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14 Answers
14
Active
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How to run Django's test database only in memory?
...BASES['default'] = {'ENGINE': 'sqlite3'}
And finally in Django 1.3 and 1.4:
if 'test' in sys.argv:
DATABASES['default'] = {'ENGINE': 'django.db.backends.sqlite3'}
(The full path to the backend isn't strictly necessary with Django 1.3, but makes the setting forward compatible.)
You can also...
Coalesce function for PHP?
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194
There is a new operator in php 5.3 which does this: ?:
// A
echo 'A' ?: 'B';
// B
echo '' ?: ...
Not showing placeholder for input type=“date” field
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edited Feb 26 at 14:58
j08691
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answe...
HashSet vs. List performance
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841
A lot of people are saying that once you get to the size where speed is actually a concern that...
How can I undo git reset --hard HEAD~1?
...d file1
1 files changed, 1 insertions(+), 0 deletions(-)
create mode 100644 file1
$ echo "added new file" > file2
$ git add file2
$ git commit -m 'added file2'
Created commit f6e5064: added file2
1 files changed, 1 insertions(+), 0 deletions(-)
create mode 100644 file2
$ git reset --hard HE...
How do I revert an SVN commit?
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454
Both examples must work, but
svn merge -r UPREV:LOWREV . undo range
svn merge -c -REV . undo...