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How to install packages offline?
...$ mkdir /pypi && cd /pypi
$ ls -la
-rw-r--r-- 1 pavel staff 237954 Apr 19 11:31 Flask-WTF-0.6.tar.gz
-rw-r--r-- 1 pavel staff 389741 Feb 22 17:10 Jinja2-2.6.tar.gz
-rw-r--r-- 1 pavel staff 70305 Apr 11 00:28 MySQL-python-1.2.3.tar.gz
-rw-r--r-- 1 pavel staff 25972...
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 can I map True/False to 1/0 in a Pandas DataFrame?
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284
A succinct way to convert a single column of boolean values to a column of integers 1 or 0:
d...
Check if a value is in an array (C#)
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234
Add necessary namespace
using System.Linq;
Then you can use linq Contains() method
string[...
How do you compare two version Strings in Java?
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28 Answers
28
Active
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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 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...
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 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...
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 :...