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How to sort an array of associative arrays by value of a given key in PHP?
...ternal cast to integer of the callback's return value. So values such as 0.99 and 0.1 will both be cast to an integer value of 0, which will compare such values as equal.
This is an important trap to bear in mind when using usort in PHP 5.x! My original version of this answer made this mistake and...
LINQ: Not Any vs All Don't
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Jon HannaJon Hanna
99.7k99 gold badges128128 silver badges227227 bronze badges
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In git, is there a simple way of introducing an unrelated branch to a repository?
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Artem TikhomirovArtem Tikhomirov
19.9k99 gold badges4343 silver badges6666 bronze badges
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What are the differences between a clustered and a non-clustered index?
...ered indexes for a table(till sql version 2005 later versions support upto 999 non-clustered indexes).
Usually made on the any key.
The leaf node of a nonclustered index does not consist of the data pages. Instead, the leaf nodes contain index rows.
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Read specific columns from a csv file with csv module?
...pandas as pd
import io
s = '''
total_bill,tip,sex,smoker,day,time,size
16.99,1.01,Female,No,Sun,Dinner,2
10.34,1.66,Male,No,Sun,Dinner,3
21.01,3.5,Male,No,Sun,Dinner,3
'''
df = pd.read_csv(io.StringIO(s), usecols=['total_bill', 'day', 'size'])
print(df)
total_bill day size
0 16.99 Sun...
With Mercurial, how can I “compress” a series of changesets into one before pushing?
...nclusive
Create a patch:
% hg export -o mypatch 100:110 --git
Update to 99:
% hg update 99
Apply the patch with --no-commit (otherwise you'll get all your changesets back):
% hg import --no-commit mypatch
Commit all changes at once:
% hg commit
You now have two heads (110 and 111) which should...
No route matches “/users/sign_out” devise rails 3
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kitdesaikitdesai
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22
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Unix shell script to truncate a large file
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André Chalella
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answered Nov 27 '12 at 2:12
chepnerchepner
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Find the division remainder of a number
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199
The remainder of a division can be discovered using the operator %:
>>> 26%7
5
In c...
PHP exec() vs system() vs passthru()
...tim, because ChipmunkNinja no longer exists.
– Phileo99
Oct 28 '14 at 5:08
2
There is a copy of t...