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Regex group capture in R with multiple capture-groups
...p in the match (and one for the whole match):
> s = c("(sometext :: 0.1231313213)", "(moretext :: 0.111222)")
> str_match(s, "\\((.*?) :: (0\\.[0-9]+)\\)")
[,1] [,2] [,3]
[1,] "(sometext :: 0.1231313213)" "sometext" "0.1231313213"
[2,] "(moretext :...
Unzipping files in Python
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edited Sep 24 '19 at 20:09
answered Aug 10 '10 at 16:23
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How can mixed data types (int, float, char, etc) be stored in an array?
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244
You can make the array elements a discriminated union, aka tagged union.
struct {
enum { ...
How do you compare two version Strings in Java?
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28 Answers
28
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Is it better practice to use String.format over string Concatenation in Java?
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250
I'd suggest that it is better practice to use String.format(). The main reason is that String....
How could the UNIX sort command sort a very large file?
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112
The Algorithmic details of UNIX Sort command says Unix Sort uses an External R-Way merge sorting...
Writing a Python list of lists to a csv file
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312
Python's built-in CSV module can handle this easily:
import csv
with open("output.csv", "wb") ...
When should I use GET or POST method? What's the difference between them?
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267
It's not a matter of security. The HTTP protocol defines GET-type requests as being idempotent...
how to show lines in common (reverse diff)?
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212
On *nix, you can use comm. The answer to the question is:
comm -1 -2 file1.sorted file2.sort...
How to filter SQL results in a has-many-through relation
...greSQL 9.0 on Debian Squeeze with decent RAM and settings.
6.000 students, 24.000 club memberships (data copied from a similar database with real life data.)
Slight diversion from the naming schema in the question: student.id is student.stud_id and club.id is club.club_id here.
I named the queries a...