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Create PostgreSQL ROLE (user) if it doesn't exist
...eate a ROLE in PostgreSQL 9.1, but without raising an error if it already exists?
10 Answers
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How can I get `find` to ignore .svn directories?
...noyingly, because Subversion stores duplicates of each file in its .svn/text-base/ directories my simple searches end up getting lots of duplicate results. For example, I want to recursively search for uint in multiple messages.h and messages.cpp files:
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Is there any Rails function to check if a partial exists?
When I render a partial which does not exists, I get an Exception. I'd like to check if a partial exists before rendering it and in case it doesn't exist, I'll render something else. I did the following code in my .erb file, but I think there should be a better way to do this:
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How do I add comments to package.json for npm install?
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Note that using multiple comments as in the first example { "//": "first", "//": "second"} prevents you from using npm version and other command line utils which usually reparse whole JSON and discard the duplicate keys in process.
– jakub.g
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How to change the background color of a UIButton while it's highlighted?
At some point in my app I have a highlighted UIButton (for example when a user has his finger on the button) and I need to change the background color while the button is highlighted (so while the finger of the user is still on the button).
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Why am I getting “Cannot Connect to Server - A network-related or instance-specific error”?
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Is it ok to use dashes in Python files when trying to import them?
...module names be chosen to be fairly short -- this won't be a problem on Unix, but it may be a problem when the code is transported to older Mac or Windows versions, or DOS.
In other words: rename your file :)
share
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MongoDB: Is it possible to make a case-insensitive query?
Example:
23 Answers
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How do I get the picture size with PIL?
..., you can also use numpy: numpy.array(im).shape
– Alex Kreimer
Jun 17 '17 at 17:26
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How to define custom configuration variables in rails
...ter modifying. There may be more elegant techniques, but I'm upgrading an existing app which previously used ENV['XXX'] in the same file, and since I want to limit the amount of refactoring during the upgrade, this worked out well.
– pduey
Apr 26 '11 at 16:13
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