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What's the (hidden) cost of Scala's lazy val?
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answered Jun 15 '10 at 7:51
oxbow_lakesoxbow_lakes
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Iterate a list with indexes in Python
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356
>>> a = [3,4,5,6]
>>> for i, val in enumerate(a):
... print i, val
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0 ...
How does numpy.histogram() work?
...n choose them automatically from the input, if none are specified. If bins=5, for example, it will use 5 bins of equal width spread between the minimum input value and the maximum input value.
The input values are 1, 2 and 1. Therefore, bin "1 to 2" contains two occurrences (the two 1 values), and ...
Dynamically select data frame columns using $ and a character value
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185
You can't do that kind of subsetting with $. In the source code (R/src/main/subset.c) it states:...
Interpolating a string into a regex
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answered Sep 29 '08 at 18:53
Jonathan LonowskiJonathan Lonowski
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Specifying rails version to use when creating a new application
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504
I found here an undocumented option to create a new application using an older version of Rail...
“ValueError: zero length field name in format” error in Python 3.0,3.1,3.2
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edited Apr 26 '15 at 22:12
answered Mar 27 '11 at 4:01
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Difference between '..' (double-dot) and '…' (triple-dot) in range generation?
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5 Answers
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String formatting in Python 3
... # '0.20'
"conversion rate: {:.2%}".format(self.goals / self.shots) # '20.45%'
"conversion rate: {:.0%}".format(self.goals / self.shots) # '20%'
"self: {!s}".format(self) # 'Player: Bob'
"self: {!r}".format(self) # '<__main__.Player instance at 0x00BF7260>'
"games: {:>3}".format(player1.g...