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In Vim, how do I apply a macro to a set of lines?
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368
Use the normal command in Ex mode to execute the macro on multiple/all lines:
Execute the mac...
What is a Lambda?
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135
Closures, lambdas, and anonymous functions are not necessarily the same thing.
An anonymous fu...
Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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3 Answers
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Why declare unicode by string in python?
...file you've saved is utf-8. The default for Python 2 is ASCII (for Python 3 it's utf-8). This just affects how the interpreter reads the characters in the file.
In general, it's probably not the best idea to embed high unicode characters into your file no matter what the encoding is; you can use ...
Generate a UUID on iOS from Swift
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635
Try this one:
let uuid = NSUUID().uuidString
print(uuid)
Swift 3/4/5
let uuid = UUID().uuid...
To find whether a column exists in data frame or not
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answered Apr 23 '12 at 7:03
user554546user554546
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Detect if a NumPy array contains at least one non-numeric value?
...ing and will work regardless of shape.
numpy.isnan(myarray).any()
Edit: 30x faster:
import timeit
s = 'import numpy;a = numpy.arange(10000.).reshape((100,100));a[10,10]=numpy.nan'
ms = [
'numpy.isnan(a).any()',
'any(numpy.isnan(x) for x in a.flatten())']
for m in ms:
print " %.2f s"...
The thread has exited with code 0 (0x0) with no unhandled exception
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138
This is just debugging message. You can switch that off by right clicking into the output windo...
What does the exclamation mark mean in a Haskell declaration?
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