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Pairs from single list
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answered Jan 7 '11 at 17:35
Jochen RitzelJochen Ritzel
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How can I use if/else in a dictionary comprehension?
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31
Worth mentioning that you don't need to have an if-else condition for both the key and the value. For example, {(a if condition else b): v...
Rails 3.1 and Image Assets
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In 3.1 you just get rid of the 'images' part of the path. So an image that lives in /assets/images/example.png will actually be accessible in a get request at this url - /assets/example.png
Because the assets/images folder gets...
In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?
Is there a corresponding X mark to ✓ ( ✓ )? What is it?
4 Answers
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Postgres - FATAL: database files are incompatible with server
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413
If you recently upgraded to 11 or 12 from 10.x you can run the below command to upgrade your pos...
UIView with rounded corners and drop shadow?
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33 Answers
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What is float in Java?
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In Java, when you type a decimal number as 3.6, its interpreted as a double. double is a 64-bit precision IEEE 754 floating point, while floatis a 32-bit precision IEEE 754 floating point. As a float is less precise than a double, the conversion cannot be performed i...
Remove all special characters, punctuation and spaces from string
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378
This can be done without regex:
>>> string = "Special $#! characters spaces 888323...
Python extending with - using super() Python 3 vs Python 2
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super() (without arguments) was introduced in Python 3 (along with __class__):
super() -> same as super(__class__, self)
so that would be the Python 2 equivalent for new-style classes:
super(CurrentClass, self)
for old-style classes you can always use:
class Classname...
Any way to properly pretty-print ordered dictionaries?
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133
As a temporary workaround you can try dumping in JSON format.
You lose some type information, b...