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to remove first and last element in array
...moves the last element from an array and returns only that element.
See all methods for an Array.
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How do I add a foreign key to an existing SQLite table?
... Dec 10 '09 at 23:26
Daniel VassalloDaniel Vassallo
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Make a number a percentage
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No reason that I know of. 83% of all percentages are made up anyway
– Naftali aka Neal
May 17 '17 at 1:21
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How to install python3 version of package via pip on Ubuntu?
I have both python2.7 and python3.2 installed in Ubuntu 12.04 .
The symbolic link python links to python2.7 .
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Angularjs ng-model doesn't work inside ng-if
...rent.foo because I'm already inside a scope with an ng-repeat -- is this really the best way?
– chovy
Nov 25 '13 at 3:58
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R script line numbers at error?
...ou the line number, but it will tell you where the failure happens in the call stack which is very helpful:
traceback()
[Edit:] When running a script from the command line you will have to skip one or two calls, see traceback() for interactive and non-interactive R sessions
I'm not aware of anot...
bundler vs RVM vs gems vs RubyGems vs gemsets vs system ruby [closed]
...encies. Rubygems is the name of the package manager - the tool used to install the packages (while the gems are the packages themselves). Rubygems is now part of Ruby.
Bundler is what makes managing gems bearable. Based on your Gemfile, a simple call to bundler using bundle install will download an...
Fix a Git detached head?
...ed HEAD
Run git branch tmp - this will save your changes in a new branch called tmp.
Run git checkout master
If you would like to incorporate the changes you made into master, run git merge tmp from the master branch. You should be on the master branch after running git checkout master.
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Best exception for an invalid generic type argument
...ere's a way in which NotSupportedException is obviously good enough, especially given its common-sense meaning. Having said that, I'm not sure if it's just right.
Given the purpose of Unconstrained Melody ...
There are various useful things that can be done with generic
methods/classes where ...
What exactly is Arel in Rails 3.0?
...alid SQL query, but one that doesn't make sense, or that does something totally different from what you think it does. This can never happen with ARel. (This is what the article I link to below means with "closed under composition".)
will objects/queries be "easier" to create?
Yes. For example, as...