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Associative arrays in Shell scripts
....0 (available now on most major distros, though not on OS X unless you install it yourself), ksh, and zsh:
declare -A newmap
newmap[name]="Irfan Zulfiqar"
newmap[designation]=SSE
newmap[company]="My Own Company"
echo ${newmap[company]}
echo ${newmap[name]}
Depending on the shell, you may need to...
What is the difference between Trap and Interrupt?
...mory access. It's also the usual way to invoke a kernel routine (a system call) because those run with a higher priority than user code. Handling is synchronous (so the user code is suspended and continues afterwards). In a sense they are "active" - most of the time, the code expects the trap to hap...
How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
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So what's the right answer here? Calling advance means we have to iterate the whole way through a possibly long string. But forming an NSRange and using NSString explicitly is dangerous? What's left?
– matt
Nov 18 '14 at...
Any reason to clean up unused imports in Java, other than reducing clutter?
...to organize the imports. Eclipse then cleans up the import section removes all the stale imports etc. If you are needing a imported thing again eclipse will add them automatically while you are completing the statement with Ctrl + SPACE. So there is no need in keeping unused code in you class.
As a...
Flexbox: center horizontally and vertically
How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally.
...
Android - Pulling SQlite database android device
... pro tip: this backup stuff won't work if the app's manifest shows android:allowBackup="false"
– Someone Somewhere
May 27 '14 at 1:23
9
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Favourite performance tuning tricks [closed]
...les (possibly archive the deleted records)
Consider doing this automatically once a day or once a week.
Rebuild Indexes
Rebuild Tables (bcp data out/in)
Dump / Reload the database (drastic, but might fix corruption)
Build new, more appropriate index
Run DBCC to see if there is possible corru...
Creating a system overlay window (always on top)
...ng to create an always-op-top button/clickable-image
which stays on top of all the windows all the time.
16 Answers
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Where should virtualenvs be created?
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Many people use the virtualenvwrapper tool, which keeps all virtualenvs in the same place (the ~/.virtualenvs directory) and allows shortcuts for creating and keeping them there. For example, you might do:
mkvirtualenv djangoproject
and then later:
workon djangoproject
It's ...
HTTPS and SSL3_GET_SERVER_CERTIFICATE:certificate verify failed, CA is OK
I am using XAMPP for development. Recently I upgraded my installation of xampp from an old version to 1.7.3.
12 Answers
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