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Use rvmrc or ruby-version file to set a project gemset with RVM?
...M, the Ruby Version Manager to specify a Ruby version and a set of gems for each of my Rails projects.
5 Answers
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Is it possible to have multiple statements in a python lambda expression?
...several different answers I can give here, from your specific question to more general concerns. So from most specific to most general:
Q. Can you put multiple statements in a lambda?
A. No. But you don't actually need to use a lambda. You can put the statements in a def instead. i.e.:
def seco...
nginx missing sites-available directory
...having is that I can't seem to find the /etc/nginx/sites-available directory.
3 Answers
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Unique fields that allow nulls in Django
...ar field should be unique, but allow nulls in it, meaning I want to allow more than one record if bar field is null , but if it is not null the values must be unique.
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Executing multi-line statements in the one-line command-line?
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you could do
echo -e "import sys\nfor r in range(10): print 'rob'" | python
or w/out pipes:
python -c "exec(\"import sys\nfor r in range(10): print 'rob'\")"
or
(echo "import sys" ; echo "for r in range(10): print 'rob'") | python
or @Silent...
How to send a command to all panes in tmux?
I like to call :clear-history on panes with a huge scrollback. However, I want to script a way to send this command to all the panes in the various windows.
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Among $_REQUEST, $_GET and $_POST which one is the fastest?
...$_POST and $_COOKIE.
But it's only a default, which depends on variables_order ; and not sure you want to work with cookies.
If I had to choose, I would probably not use $_REQUEST, and I would choose $_GET or $_POST -- depending on what my application should do (i.e. one or the other, but not bot...
How to check if PHP array is associative or sequential?
...ich of these behaviours you actually need. (It may be that either will do for your purposes.)
The first question (simply checking that all keys are numeric) is answered well by Captain kurO.
For the second question (checking whether the array is zero-indexed and sequential), you can use the follow...
What does it mean to “program to an interface”?
...re are some wonderful answers on here to this questions that get into all sorts of great detail about interfaces and loosely coupling code, inversion of control and so on. There are some fairly heady discussions, so I'd like to take the opportunity to break things down a bit for understanding why a...
Why doesn't java.util.Set have get(int index)?
...e please explain why the java.util.Set interface lacks get(int Index) , or any similar get() method?
18 Answers
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