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Mapping over values in a python dictionary
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These toolz are great for this kind of simple yet repetitive logic.
http://toolz.readthedocs.org/en/latest/api.html#toolz.dicttoolz.valmap
Gets you right where you want to be.
import toolz
def f(x):
return x+1
toolz.valmap(f, my_list)
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How to drop columns using Rails migration
...changes at once.
Here's the full list of supported change_table methods:
http://apidock.com/rails/ActiveRecord/ConnectionAdapters/SchemaStatements/change_table
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jQuery get mouse position within an element
...ece of code, its quite nice :)
<script language="javascript" src="http://code.jquery.com/jquery-1.4.1.js" type="text/javascript"></script>
<script language="javascript">
$(document).ready(function(){
$(".div_container").mousemove(function(e){
var parentOffset = $(...
Understanding Node.js modules: multiple requires return the same object?
...s the ability to delete files from the cache without killing the process.
http://nodejs.org/docs/latest/api/globals.html#require.cache
Ouh, forgot to answer the question. Modifying the exported object does not affect the next module-loading. This would cause much trouble... Require always return a...
Can scripts be inserted with innerHTML?
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Here is a very interesting solution to your problem:
http://24ways.org/2005/have-your-dom-and-script-it-too
So use this instead of script tags:
<img src="empty.gif" onload="alert('test');this.parentNode.removeChild(this);" />
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The 'json' native gem requires installed build tools
...lt ruby 1.9.3 then success full install ruby
3) Download DevKit file from http://rubyinstaller.org/downloads (DevKit-tdm-32-4.5.2-20110712-1620-sfx.exe)
4) Extract DevKit to path C:\Ruby193\DevKit
5) cd C:\Ruby193\DevKit
6) ruby dk.rb init
7) ruby dk.rb review
8) ruby dk.rb install
9) cmd : g...
Get month name from Date
... If you're going the route of heavy optimization and reducing http requests, this may not be an option for you. Instead, stick with just using an array of month names if you are only going to format the month names in one line of code.
– OzzyTheGiant
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What's the equivalent of use-commit-times for git?
...ckaged into Debian/Ubuntu/Mint, Fedora, Gentoo and possibly other distros:
https://github.com/MestreLion/git-tools#install
sudo apt install git-restore-mtime # Debian/Ubuntu/Mint
yum install git-tools # Fedora/ RHEL / CentOS
emerge dev-vcs/git-tools # Gentoo
IMHO, not sto...
how to log in to mysql and query the database from linux terminal
...mand line client for mysql RDBMS, and comes with most mysql installations: http://dev.mysql.com/doc/refman/5.1/en/mysql.html
To stop or start mysql database (you rarely should need doing that 'by hand'), use proper init script with stop or start parameter, usually /etc/init.d/mysql stop. This, howe...
What is the main purpose of setTag() getTag() methods of View?
...emselves rather than by putting them in a separate structure.
Reference: http://developer.android.com/reference/android/view/View.html
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