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Get file name and extension in Ruby
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edited Mar 24 '18 at 18:00
JP Silvashy
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What is the difference between square brackets and parentheses in a regex?
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127
These regexes are equivalent (for matching purposes):
/^(7|8|9)\d{9}$/
/^[789]\d{9}$/
/^[7-9]...
How to create a new database using SQLAlchemy?
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answered Jan 23 '12 at 19:01
SingleNegationEliminationSingleNegationElimination
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Design Patterns: Factory vs Factory method vs Abstract Factory
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256
All three Factory types do the same thing: They are a "smart constructor".
Let's say you want...
What's a 3D doing in this HTML?
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answered Oct 25 '10 at 15:27
Chris Jester-YoungChris Jester-Young
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Bidirectional 1 to 1 Dictionary in C#
I am looking for a generic, bidirectional 1 to 1 Dictionary class in C# (2), ie. a BiDictionaryOneToOne<T, S> which is guaranteed to only contain one of each value and key (up to RefEquals anyway), and which can be searched using either key or value. Anyone know of one, or should I just impl...
Threading in a PyQt application: Use Qt threads or Python threads?
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edited Apr 3 '12 at 15:33
answered Oct 29 '09 at 18:28
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What are some good Python ORM solutions? [closed]
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12 Answers
12
Active
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How to compare strings in Bash
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1422
Using variables in if statements
if [ "$x" = "valid" ]; then
echo "x has the value 'valid'"
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