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How can I output leading zeros in Ruby?
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If the maximum number of digits in the counter is known (e.g., n = 3 for counters 1..876), you can do
str = "file_" + i.to_s.rjust(n, "0")
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Time complexity of Sieve of Eratosthenes algorithm
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Your n/2 + n/3 + n/5 + … n/97 is not O(n), because the number of terms is not constant. [Edit after your edit: O(n2) is too loose an upper bound.] A loose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprocals of all numbers...
Is having an 'OR' in an INNER JOIN condition a bad idea?
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Declaring a default constraint when creating a table
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edited Aug 16 '15 at 13:10
community wiki
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Converting from Integer, to BigInteger
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jbindeljbindel
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With MySQL, how can I generate a column containing the record index in a table?
...SERT INTO league_girl VALUES (2, 'b', 25);
INSERT INTO league_girl VALUES (3, 'c', 75);
INSERT INTO league_girl VALUES (4, 'd', 25);
INSERT INTO league_girl VALUES (5, 'e', 55);
INSERT INTO league_girl VALUES (6, 'f', 80);
INSERT INTO league_girl VALUES (7, 'g', 15);
Test query:
SELECT l.positio...
How to trim leading and trailing white spaces of a string?
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There's a bunch of functions to trim strings in go.
See them there : Trim
Here's an example, ...
Flask vs webapp2 for Google App Engine
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Disclaimer: I'm the author of tipfy and webapp2.
A big advantage of sticking with webapp (or i...
How to escape os.system() calls?
... other kind of nasty shell metacharacter.
Update: If you are using Python 3.3 or later, use shlex.quote instead of rolling your own.
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trying to align html button at the center of the my page [duplicate]
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MrMaavin
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answered Aug 3 '12 at 15:56
MohamadMohamad
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