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validation custom message for rails 3
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Andrew Hendrie
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answered Mar 22 '11 at 4:33
ShivShiv
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What is a “memory stomp”?
... David SchwartzDavid Schwartz
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3
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Can I call memcpy() and memmove() with “number of bytes” set to zero?
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147
From the C99 standard (7.21.1/2):
Where an argument declared as size_t n specifies the lengt...
Initializing a member array in constructor initializer
...9:02
ST3
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answered Oct 30 '10 at 9:26
Cheers and hth. -...
Git: updating remote branch information
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Garrett HydeGarrett Hyde
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What does SQL clause “GROUP BY 1” mean?
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77
SELECT account_id, open_emp_id
^^^^ ^^^^
1 2
FROM account
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How to do a newline in output
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337
Use "\n" instead of '\n'
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Run JavaScript when an element loses focus
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CanavarCanavar
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add a c...
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 up to n), which ...
Get the first N elements of an array?
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370
Use array_slice()
This is an example from the PHP manual: array_slice
$input = array("a", ...