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What is the difference between t.belongs_to and t.references in rails?
What is the difference between t.references and t.belongs_to ?
Why are we having those two different words? It seems to me they do the same thing?
Tried some Google search, but find no explanation.
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CORS: Cannot use wildcard in Access-Control-Allow-Origin when credentials flag is true
...these questions :
Access-Control-Allow-Origin wildcard subdomains, ports and protocols
Cross Origin Resource Sharing with Credentials
Besides * is too permissive and would defeat use of credentials. So set http://localhost:3000 or http://localhost:8000 as the allow origin header.
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What is the Ruby (spaceship) operator?
...en return -1
if a = b then return 0
if a > b then return 1
if a and b are not comparable then return nil
It's useful for sorting an array.
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Wrapping null-returning method in Java with Option in Scala?
...ause Try is not about nullability checking but just a way to functionally handle exceptions.
Using Try to catch an exception and converting that to an Option for convenience will only show None in case an exception happens.
scala> Try(1/0).toOption
res11: Option[Int] = None
You want to preser...
Fast way of counting non-zero bits in positive integer
...1") is the fastest I could find in pure Python.
I tried adapting Óscar's and Adam's solutions to process the integer in 64-bit and 32-bit chunks, respectively. Both were at least ten times slower than bin(n).count("1") (the 32-bit version took about half again as much time).
On the other hand, gm...
How to copy a directory structure but only include certain files (using windows batch files)
... @Niels Brinch Yes, you should be able to do that. What is the exact command line you are using?
– aphoria
Sep 19 '12 at 23:53
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http HEAD vs GET performance
...ter than retrieving the entire resource.
You could implement both options and benchmark them to see which is faster, but rather than micro-optimize, I would focus on designing the ideal REST interface. A clean REST API is usually more valuable in the long run than a kludgey API that may or may not ...
What does JVM flag CMSClassUnloadingEnabled actually do?
...//blogs.oracle.com/poonam/about-g1-garbage-collector,-permanent-generation-and-metaspace Kudos go to mt.uulu
For Java 5-7:
The standard Oracle/Sun VM look on the world is: Classes are forever. So once loaded, they stay in memory even if no one cares anymore. This usually is no problem since you do...
How to use Active Support core extensions
I have Active Support 3.0.3 installed and Rails 3.0.3 with Ruby 1.8.7.
5 Answers
5
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Converting a String to DateTime
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Since you are handling 24-hour based time and you have a comma separating the seconds fraction, I recommend that you specify a custom format:
DateTime myDate = DateTime.ParseExact("2009-05-08 14:40:52,531", "yyyy-MM-dd HH:mm:ss,fff",
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