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How to replace a hash key with another key
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140
rails Hash has standard method for it:
hash.transform_keys{ |key| key.to_s.upcase }
http://a...
Alternatives to gprof [closed]
...or as many as 4. So that 60% measurement is more like a general range from 40% to 80%. If it were only 40%, would you say the problem is not worth fixing? So what's the point of time accuracy, when what you really want is to find the problems?
500 or 5000 samples would have measured the problem with...
How to run Rake tasks from within Rake tasks?
...riable, do that before calling invoke. For example: ENV['VERSION'] = '20110408170816'; Rake::Task['db:migrate'].invoke See here for more explanation.
– Michael Stalker
Jun 18 '13 at 14:25
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When should I use Memcache instead of Memcached?
... in group) supports multiple high volume OLTP applications answering 25K ~ 40K mc->get calls per-second. These calls are those that do NOT have to reach a database.
IMHO, this use of memcached provided SERIOUS $$$,$$$savings on CAPEX for new DB servers & licences as well as on support contr...
Counting DISTINCT over multiple columns
...oach?
– The Red Pea
Jan 9 '16 at 15:40
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Is log(n!) = Θ(n·log(n))?
... nbro
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answered Jan 19 '10 at 17:23
MickMick
4,14911 gold badge16...
How to use UIVisualEffectView to Blur Image?
...2.
– Benjamin Mayo
Jun 21 '14 at 11:40
2
Thanks. I have tested and confirmed the bug fix and edit...
How do you list the primary key of a SQL Server table?
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edited Nov 28 '11 at 21:40
Raj More
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answ...
powershell 2.0 try catch how to access the exception
...th d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 45.2525 4.66231 44.6595 ...
Replace a value in a data frame based on a conditional (`if`) statement
...b.
– Gavin Simpson
Apr 28 '11 at 20:40
@KennyPeanuts: the column name is one issue, Look at a <- data.frame(x<-...