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Drop rows with all zeros in pandas data frame
...0,1,0,1]})
> df = df[(df.T != 0).any()]
> df
a b
1 0 1
2 1 0
3 1 1
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Is it intended by the C++ standards committee that in C++11 unordered_map destroys what it inserts?
...obvious behaviour occurs in very recent compilers only: I found that clang 3.2-3.4 and GCC 4.8 are the only compilers to demonstrate this "feature".
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How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
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Multiple Type Constraints in Swift
...e T:SomeProtocol, T:SomeOtherProtocol>(arg: T) {
// stuff
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Swift 3 & 4:
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or the more powerful where clause:
func someFunc<T>(arg: T) where T:SomeProtocol, T:SomeOtherProtocol{
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Order data frame rows according to vector with specific order
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236
Try match:
df <- data.frame(name=letters[1:4], value=c(rep(TRUE, 2), rep(FALSE, 2)))
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How do I translate an ISO 8601 datetime string into a Python datetime object? [duplicate]
...olid date parsing. If you were to get an ISO 8601 string like: 2010-05-08T23:41:54.000Z you'd have a fun time parsing that with strptime, especially if you didn't know up front whether or not the timezone was included. pyiso8601 has a couple of issues (check their tracker) that I ran into during my ...
Are there any side effects of returning from inside a using() statement?
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answered Mar 3 '10 at 9:07
Jon SkeetJon Skeet
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initializing a boolean array in java
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edited Jan 2 '13 at 16:17
answered Mar 2 '10 at 16:42
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Batch files - number of command line arguments
...imrodmnimrodm
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Can you do greater than comparison on a date in a Rails 3 search?
I have this search in Rails 3:
4 Answers
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