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Is there an MD5 Fixed Point where md5(x) == x?
...ute a hash on a 16 byte value, it would take 10790283070806014188970529154.99 years to calculate all those hashes.
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How to call a JavaScript function from PHP?
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Peter BaileyPeter Bailey
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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.
...
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...
Using Git, show all commits that are in one branch, but not the other(s)
...n development branch:
git cherry -v master
Example output:
+ 8a14709d08c99c36e907e47f9c4dacebeff46ecb Commit message
+ b30ccc3fb38d3d64c5fef079a761c7e0a5c7da81 Another commit message
- 85867e38712de930864c5edb7856342e1358b2a0 Yet another message
Note: The -v flag is to include the commit messag...
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
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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
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No route matches “/users/sign_out” devise rails 3
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kitdesaikitdesai
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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...