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In .NET, which loop runs faster, 'for' or 'foreach'?
...hrough a list with foreach than it does to loop through an array with for, and you're calling that insignificant? That kind of a performance difference might matter for your application, and it might not, but I wouldn't just dismiss it out of hand.
– Robert Harvey
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Multiply TimeSpan in .NET
...ged to point out that @JustinPihony answered nearly two years before I did and it was the information in his answer that allowed me to write mine.
– Stephen Hewlett
Oct 25 '13 at 20:36
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How would I get a cron job to run every 30 minutes?
...to add a crontab entry to execute a script every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0.
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How to update a single library with Composer?
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To install doctrine/doctrine-fixtures-bundle with version 2.1.* and minimum stability @dev use this:
composer.phar require doctrine/doctrine-fixtures-bundle:2.1.*@dev
then to update only this single package:
composer.phar update doctrine/doctrine-fixtures-bundle
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Install parent POM without building Child modules
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Use the '-N' option in the mvn command.
From mvn -h:
-N,--non-recursive Do not recurse into sub-projects
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“No X11 DISPLAY variable” - what does it mean?
...erent userid, this will fail.
If you're coming in from another machine, and you're at the main display of that machine and it's running X, then you can use "ssh -X hostname" to connect to that host, and ssh will forward the X display back. ssh will also make sure that the DISPLAY environment var...
git -> show list of files changed in recent commits in a specific directory
In Subversion svn log is the command to display commit log messages -- for details see the online manual at http://svnbook.red-bean.com/en/1.7/svn.ref.svn.c.log.html
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What does the (unary) * operator do in this Ruby code?
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The * is the splat operator.
It expands an Array into a list of arguments, in this case a list of arguments to the Hash.[] method. (To be more precise, it expands any object that responds to to_ary/to_a, or to_a in Ruby 1.9.)
To illustrate, the following two ...
Visual Studio 2012 - Intellisense sometimes disappearing / broken
My colleagues and I are using VS2012 for some weeks now. Sometimes after working several hours the intellisense is broken. After closing all open tabs it works again.
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Is there a recommended format for multi-line imports?
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Personally I go with parentheses when importing more than one component and sort them alphabetically. Like so:
from Tkinter import (
Button,
Canvas,
DISABLED,
END,
Entry,
Frame,
LEFT,
NORMAL,
RIDGE,
Text,
Tk,
)
This has the added advantage of easily ...