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Common MySQL fields and their appropriate data types
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answered Dec 10 '08 at 0:57
da5idda5id
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Practical non-image based CAPTCHA approaches?
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103 Answers
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find() with nil when there are no records
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Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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What is the proper #include for the function 'sleep()'?
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edited Dec 10 '19 at 10:16
Daniel Selvan
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adding noise to a signal in python
I want to add some random noise to some 100 bin signal that I am simulating in Python - to make it more realistic.
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Does it make sense to use “as” instead of a cast even if there is no null check? [closed]
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edited Jan 27 '10 at 23:56
answered Jan 26 '10 at 14:01
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How to quit scala 2.11.0 REPL?
In the last version of scala (2.10.3) REPL, I can type exit to quit from REPL. However, in Scala 2.11.0 this doesn't work.
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for each loop in Objective-C for accessing NSMutable dictionary
... every class that conforms to the NSFastEnumeration protocol (available on 10.5+ and iOS), though NSDictionary is one of the few collections which lets you enumerate keys instead of values. I suggest you read about fast enumeration in the Collections Programming Topic.
Oh, I should add however that...
Multiple select statements in Single query
...re is even a far better way, see my answer.
– Pentium10
Feb 13 '10 at 9:45
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"Operand should cont...
Possible to access the index in a Hash each loop?
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answered Jan 18 '10 at 2:38
YOUYOU
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