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nodejs require inside TypeScript file
...d a symbol. The compiler comes together with a set of default definitions for window, document and such specified in a file called lib.d.ts. If I do a grep for require in this file I can find no definition of a function require. Hence, we have to tell the compiler ourselves that this function will e...
PHP substring extraction. Get the string before the first '/' or the whole string
...sing the limit parameter to explode so that php won't scan the string any more than what's needed.
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How to count the number of true elements in a NumPy bool array
... to count the number of elements whose values are True . Is there a NumPy or Python routine dedicated for this task? Or, do I need to iterate over the elements in my script?
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What's the best way to unit test protected & private methods in Ruby?
...ed and private methods in Ruby, using the standard Ruby Test::Unit framework?
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What are enums and why are they useful?
...I found a mention of an enum being used in singleton pattern about purported thread safety benefits to such solution.
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Are single quotes allowed in HTML?
...strings. As a result, when I am generating HTML I often use single quotes for setting tag fields. For example:
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Viewing a Deleted File in Git
...eleted a file with Git and then committed, so the file is no longer in my working copy. I want to look at the contents of that file, but not actually restore it. How can I do this?
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What does “rc” mean in dot files
... had a command-script feature called "runcom". Early Unixes used ‘rc’ for the name of the operating system's boot script, as a tribute to CTSS runcom.
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Iterate through every file in one directory
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As others have said, Dir::foreach is a good option here. However, note that Dir::foreach and Dir::entries will always include . and .. (the current and parent directories). You will generally not want to work on them, so you can use Dir::each_child or ...
How to delete migration files in Rails 3
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I usually:
Perform a rake db:migrate VERSION=XXX on all environments, to the version before the one I want to delete.
Delete the migration file manually.
If there are pending migrations (i.e., the migration I removed was not the last one), ...