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Unittest setUp/tearDown for several tests
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edited Dec 5 '11 at 20:13
answered Dec 5 '11 at 19:56
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Remove rows with all or some NAs (missing values) in data.frame
...only certain columns of the dataframe:
> final[complete.cases(final[ , 5:6]),]
gene hsap mmul mmus rnor cfam
2 ENSG00000199674 0 2 2 2 2
4 ENSG00000207604 0 NA NA 1 2
6 ENSG00000221312 0 1 2 3 2
Your solution can't work. If you insist on ...
How do you know when to use fold-left and when to use fold-right?
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105
You can transfer a fold into an infix operator notation (writing in between):
This example fold...
Are tuples more efficient than lists in Python?
...ch faster than assigning a list.
>>> def a():
... x=[1,2,3,4,5]
... y=x[2]
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>>> def b():
... x=(1,2,3,4,5)
... y=x[2]
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>>> import dis
>>> dis.dis(a)
2 0 LOAD_CONST 1 (1)
3 LOAD_CONST 2 (2...
How to add image to canvas
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edited Feb 15 '18 at 21:38
answered May 15 '11 at 21:32
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ruby convert array into function arguments
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JohnsywebJohnsyweb
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Maintaining the final state at end of a CSS3 animation
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567
Try adding animation-fill-mode: forwards;. For example like this:
-webkit-animation: bubble ...
Add a number to each selection in Sublime Text 2, incremented once per selection
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answered Feb 3 '13 at 8:15
aantonaanton
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