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How to calculate the number of occurrence of a given character in each row of a column of strings?
... 2
#2 2 magic 1
#3 3 not 0
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How to generate a range of numbers between two numbers?
I have two numbers as input from the user, like for example 1000 and 1050 .
28 Answers
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Interpolating a string into a regex
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answered Sep 29 '08 at 18:53
Jonathan LonowskiJonathan Lonowski
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Can dplyr package be used for conditional mutating?
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220
Use ifelse
df %>%
mutate(g = ifelse(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4), 2,
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Git Tag list, display commit sha1 hashes
...can run:
git show-ref --tags
The output will then look something like:
0e76920bea4381cfc676825f3143fdd5fcf8c21f refs/tags/1.0.0
5ce9639ead3a54bd1cc062963804e5bcfcfe1e83 refs/tags/1.1.0
591eceaf92f99f69ea402c4ca639605e60963ee6 refs/tags/1.2.0
40414f41d0fb89f7a0d2f17736a906943c05acc9 refs/tags/1.3...
How to determine the longest increasing subsequence using dynamic programming?
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407
OK, I will describe first the simplest solution which is O(N^2), where N is the size of the col...
Getting current date and time in JavaScript
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600
.getMonth() returns a zero-based number so to get the correct month you need to add 1, so calli...
MFC CSplitterWnd的用法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...user-defined views derived from CMDIView
m_wndSplitter.CreateView(0,0,RUNTIME_CLASS(COneView), CSize(0,0),
pContext);
m_wndSplitter.CreateView(1,0,RUNTIME_CLASS(CAnotherView), CSize(0,0),
pContext);
return (bCreateSpltr);
}
或者：
BOOL...
Why does 0.ToString(“#.##”) return an empty string instead of 0.00 or at least 0?
Why does 0.ToString("#.##") return an empty string? Shouldn't it be 0.00 or at least 0 ?
5 Answers
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