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How to find the length of a string in R
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Gavin SimpsonGavin Simpson
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WinDBG用法详解 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
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Apache Spark: map vs mapPartitions?
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edited Dec 20 '15 at 22:09
Alberto Bonsanto
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What is the difference between ~> and >= when specifying rubygem in Gemfile?
...sion provided and use that until it reaches a maximum version. So ~>0.8.5 is semantically equivalent to:
gem "cucumber", ">=0.8.5", "<0.9.0"
The easy way to think about it is that you're okay with the last digit incrementing to some arbitrary value, but the ones preceding it in the string...
What is the optimal Jewish toenail cutting algorithm?
...ish rule. Luckily, humans only have five toes per foot*, so there are only 5! = 120 unrestricted sequences.
Python example:
#seq is only valid when consecutive elements in the list differ by at least two.
def isValid(seq):
for i in range(len(seq)-1):
a = seq[i]
b = seq[i+1]
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Concatenating two one-dimensional NumPy arrays
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There are several possibilities for concatenating 1D arrays, e.g.,
numpy.r_[a, a],
numpy.stack(...
C++ preprocessor __VA_ARGS__ number of arguments
... PP_ARG_N(__VA_ARGS__)
#define PP_ARG_N( \
_1, _2, _3, _4, _5, _6, _7, _8, _9,_10, \
_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, \
_21,_22,_23,_24,_25,_26,_27,_28,_29,_30, \
_31,_32,_33,_34,_35,_36,_37,_38,_39,_40, \
_41,_42,_43,_44,_45,_46,_47,_48,_49...
Select multiple columns in data.table by their numeric indices
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5 Answers
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Are there any side effects of returning from inside a using() statement?
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5 Answers
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Python - abs vs fabs
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NPENPE
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