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How to use concerns in Rails 4
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edited Mar 17 '15 at 6:34
Dinshaw Raje
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answered Feb 25 '13 at...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...ities, knowing bi allows to compute
c1 = a1 + a2 + ... ak
c2 = a1a2 + a1a3 + ... + ak-1ak
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ck = a1a2 ... ak
If you expand the polynomial (x-a1)...(x-ak) the coefficients will be exactly c1, ..., ck - see Viète's formulas. Since every polynomial factors uniquely (ring of polynomials is an Eu...
How To Format A Block of Code Within a Presentation? [closed]
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RobotEyesRobotEyes
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git reset --hard HEAD leaves untracked files behind
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You have to use git clean -f -d to get rid of untracked files and directories in your working c...
Difference between 2 dates in SQLite
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SELECT julianday('now') - julianday(DateCreated) FROM Payment;
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How to determine a user's IP address in node
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edited Mar 28 '17 at 3:15
a0viedo
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answered Nov 12 '11 at 22:07...
What's an Aggregate Root?
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In the context of the repository pattern, aggregate roots are the only objects your client cod...
Make a program run slowly
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edited May 23 '17 at 10:29
Community♦
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answered Jan 17 '13 at 2:51
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CSV API for Java [closed]
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Apache Commons CSV
Check out Apache Common CSV.
This library reads and writes several variati...
Android: Storing username and password?
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Eric LevineEric Levine
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