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Install a Python package into a different directory using pip?
I know the obvious answer is to use virtualenv and virtualenvwrapper, but for various reasons I can't/don't want to do that.
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recursion versus iteration
Is it correct to say that everywhere recursion is used a for loop could be used? And if recursion is usually slower what is the technical reason for ever using it over for loop iteration?
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What special characters must be escaped in regular expressions?
I am tired of always trying to guess, if I should escape special characters like ' ()[]{}| ' etc. when using many implementations of regexps.
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How to add local jar files to a Maven project?
How do I add local jar files (not yet part of the Maven repository) directly in my project's library sources?
31 Answers
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Git undo changes in some files [duplicate]
While coding I added print statements into some files to keep track of what was going on.
6 Answers
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Failed to allocate memory: 8
From today, when I tried to run an app in NetBeans on a 2.3.3 Android platform, it shows me that:
20 Answers
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How do I modify fields inside the new PostgreSQL JSON datatype?
...ctionality within PostgreSQL itself (but none for json; casts are required to manipulate json values).
Merging 2 (or more) JSON objects (or concatenating arrays):
SELECT jsonb '{"a":1}' || jsonb '{"b":2}', -- will yield jsonb '{"a":1,"b":2}'
jsonb '["a",1]' || jsonb '["b",2]' -- will yield j...
What are the dark corners of Vim your mom never told you about? [closed]
...w.
Basic command, yet extremely useful.
:w !sudo tee %
I often forget to sudo before editing a file I don't have write permissions on. When I come to save that file and get a permission error, I just issue that vim command in order to save the file without the need to save it to a temp file and...
Representing null in JSON
...ut as always, it depends on what you're doing -- sometimes the "right" way to do it doesn't always work for your situation. Use your judgement and make an informed decision.
JSON1 {}
This returns an empty object. There is no data there, and it's only going to tell you that whatever key you're look...
Delete all but the most recent X files in bash
Is there a simple way, in a pretty standard UNIX environment with bash, to run a command to delete all but the most recent X files from a directory?
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