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How can I compare two lists in python and return matches
...nt one, but by far the most obvious way to do it is:
>>> a = [1, 2, 3, 4, 5]
>>> b = [9, 8, 7, 6, 5]
>>> set(a) & set(b)
{5}
if order is significant you can do it with list comprehensions like this:
>>> [i for i, j in zip(a, b) if i == j]
[5]
(only works...
How to make --no-ri --no-rdoc the default for gem install?
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12 Answers
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What is the “-->” operator in C++?
...rised that the following snippet compiled and worked in both Visual Studio 2008 and G++ 4.4.
25 Answers
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Easy way to print Perl array? (with a little formatting)
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answered Apr 21 '11 at 7:52
AlexAlex
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Argparse optional positional arguments?
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edited Jan 2 '17 at 8:30
anatoly techtonik
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Is the “struct hack” technically undefined behavior?
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52
As the C FAQ says:
It's not clear if it's legal or portable, but it is rather popular.
and...
Convert string to Python class object?
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120
Warning: eval() can be used to execute arbitrary Python code. You should never use eval() wi...
Check if $_POST exists
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172
if( isset($_POST['fromPerson']) )
{
$fromPerson = '+from%3A'.$_POST['fromPerson'];
ech...
How do I create a directory from within Emacs?
...ET dir/to/create RET
to create directories dir/parent1/node and dir/parent2/node, type:
M-! mkdir -p dir/parent{1,2}/node RET
It assumes that Emacs's inferior shell is bash/zsh or other compatible shell.
or in a Dired mode
+
It doesn't create nonexistent parent directories.
Example:
C-x d ...