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Listing all permutations of a string/integer
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158
First of all: it smells like recursion of course!
Since you also wanted to know the principle,...
how to check the dtype of a column in python pandas
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127
You can access the data-type of a column with dtype:
for y in agg.columns:
if(agg[y].dtyp...
Select multiple columns in data.table by their numeric indices
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185
For versions of data.table >= 1.9.8, the following all just work:
library(data.table)
dt &...
MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
MFC学习总结 (90个技巧) dlg 上建立View1．属性页的添加：创建对话框的类，该类要从CpropertyPage继承；然后在要添加该对话框为 属性页的类(头文件)里创建CpropertySheet类的一 [page]属性页的添加[/page]1．属性页的添加：
创建对话框...
How to atomically delete keys matching a pattern using Redis
...g like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document says, because of performance maters, keys
command should not use for regular operations in production, this
command is intended for debuggi...
Performance of foreach, array_map with lambda and array_map with static function
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122
FWIW, I just did the benchmark since poster didn't do it. Running on PHP 5.3.10 + XDebug.
UP...
`elif` in list comprehension conditionals
...essions were designed exactly for this sort of use-case:
>>> l = [1, 2, 3, 4, 5]
>>> ['yes' if v == 1 else 'no' if v == 2 else 'idle' for v in l]
['yes', 'no', 'idle', 'idle', 'idle']
Hope this helps :-)
s...
Set Matplotlib colorbar size to match graph
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198
You can do this easily with a matplotlib AxisDivider.
The example from the linked page also w...
How can I find the length of a number?
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