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How do I create a dictionary with keys from a list and values defaulting to (say) zero? [duplicate]
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dict((el,0) for el in a) will work well.
Python 2.7 and above also support dict comprehensions. That syntax is {el:0 for el in a}.
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How can I check if a directory exists in a Bash shell script?
What command can be used to check if a directory exists or not, within a Bash shell script?
35 Answers
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How to change the cursor into a hand when a user hovers over a list item?
I've got a list, and I have a click handler for its items:
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How to document a method with parameter(s)?
...red Apr 8 '12 at 19:49
Vladimir KeleshevVladimir Keleshev
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Regular expression to allow spaces between words
...t prevents symbols and only allows letters and numbers. The regex below works great, but it doesn't allow for spaces between words.
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Regex replace uppercase with lowercase letters
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You may:
Find: (\w)
Replace With: \L$1
Or select the text, ctrl+K+L.
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Xcode Product -> Archive disabled
... anything. I went through the provisioning setup for the project and it looks ok.
4 Answers
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Python Script execute commands in Terminal
... answered Sep 16 '10 at 21:32
Uku LoskitUku Loskit
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Print list without brackets in a single row
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print(', '.join(names))
This, like it sounds, just takes all the elements of the list and joins them with ', '.
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Condition within JOIN or WHERE
... the queries in the most readable way possible.
Sometimes this includes making the INNER JOIN relatively "incomplete" and putting some of the criteria in the WHERE simply to make the lists of filtering criteria more easily maintainable.
For example, instead of:
SELECT *
FROM Customers c
INNER JOI...