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Remove empty strings from a list of strings
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I would use filter:
str_list = filter(None, str_list)
str_list = filter(bool, str_list)
str_list = filter(len, str_list)
str_list = filter(lambda item: item, str_list)
Python 3 returns an iterator from filter, so should be wrapped in a call to list()
str_list =...
How can I read large text files in Python, line by line, without loading it into memory?
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@rochacbruno, it only reads one line at a time. When the next line is read, the previous one will be garbage collected unless you have stored a reference to it somewhere else
– John La Rooy
Jun 25 '11 at 2:33
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Check existence of input argument in a Bash shell script
...X acceptable. [ -z "$1" ] && echo "No argument supplied" I prefer one-liners, as they are easier for me; and it's also faster to check exit value, compared to using if
– J. M. Becker
Jun 2 '12 at 20:38
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Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
...assign it dynamically without having to code the function specifically for one method of attachment or another. Hence my onclick (or on anything) in HTML markup look like this:
onclick="someFunc.call(this)"
OR
onclick="someFunc.apply(this, arguments)"
Using javascript:void(0) avoids all of the...
Reading 64bit Registry from a 32bit application
..., 64 bit.
Instead of using "Wow6432Node", which emulates a node by mapping one registry tree into another making it appear there virtually, you can do the follwing:
Decide, whether you need to access the 64 bit or the 32 bit registry, and use it as described below. You may also use the code I mentio...
Converting many 'if else' statements to a cleaner approach [duplicate]
...er" even though the newer code shares the same disadvantages, than the old one.
– Tom
Oct 11 '15 at 17:03
1
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Angular IE Caching issue for $http
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This worked for my local GET requests, but it caused the one CORS request I was making to start using the OPTIONS method instead of the GET method. The 3rd party server doesn't support the OPTIONS method, so my workaround is to use jQuery.get() to make that request and use $scope.a...
jQuery Determine if a matched class has a given id
...Note that it won't apply to all #foo elements (though there should only be one), and it won't apply to all .bar elements (though there may be many). It will only reference elements that qualify on both attributes.
jQuery also has a great .is method that lets your determine whether an element has ce...
Run git pull over all subdirectories [duplicate]
...ory
-type d to find directories, not files
-depth 1 for a maximum depth of one sub-directory
-exec {} \; runs a custom command for every find
git --git-dir={}/.git --work-tree=$PWD/{} pull git pulls the individual directories
To play around with find, I recommend using echo after -exec to preview,...
Fast way of counting non-zero bits in positive integer
...ual to the number of bits set in the bucket (0 if no bits are set and 1 if one bit is set). The first transformation results in an analogous state, but with 32 buckets each 2-bit long. This is achieved by appropriately shifting the buckets and adding their values (one addition takes care of all buck...