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What is the difference between ~> and >= when specifying rubygem in Gemfile?
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Python Pandas merge only certain columns
...nly merge some columns? I have a DataFrame df1 with columns x, y, z, and df2 with columns x, a ,b, c, d, e, f, etc.
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BindingFlags.IgnoreCase not working for Type.GetProperty()?
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edited Oct 6 '17 at 16:12
boop_the_snoot
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Compare if two variables reference the same object in python
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edited Jan 26 '19 at 19:29
jpp
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How do you know when to use fold-left and when to use fold-right?
...re, you use a left fold. Example (haskell-style pseudocode)
foldl (-) [1, 2, 3] == (1 - 2) - 3 == 1 - 2 - 3 // - is left-associative
If your operator is right-associative (right fold), the parentheses would be set like this:
A x (B x (C x D))
Example: Cons-Operator
foldr (:) [] [1, 2, 3] == 1...
File content into unix variable with newlines
...anscript for a demo:
pax> cat num1.txt ; x=$(cat num1.txt)
line 1
line 2
pax> echo $x ; echo '===' ; echo "$x"
line 1 line 2
===
line 1
line 2
The reason why newlines are replaced with spaces is not entirely to do with the echo command, rather it's a combination of things.
When given a ...
How to hide output of subprocess in Python 2.7
I'm using eSpeak on Ubuntu and have a Python 2.7 script that prints and speaks a message:
5 Answers
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RegEx to find two or more consecutive chars
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This should do the trick:
[a-zA-Z]{2,}
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How to use nodejs to open default browser and navigate to a specific URL
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edited Jan 26 '17 at 14:08
answered Nov 16 '12 at 15:32
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How do you increase the max number of concurrent connections in Apache?
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