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Change a column type from Date to DateTime during ROR migration
...f you're wondering why a single change method isn't used instead of the up and down methods, it's because the change method doesn't support the change_column migration definition.
– Dennis
Feb 25 '14 at 21:35
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Likelihood of collision using most significant bits of a UUID in Java
If I'm using Long uuid = UUID.randomUUID().getMostSignificantBits() how likely is it to get a collision. It cuts off the least significant bits, so there is a possibility that you run into a collision, right?
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Discard all and get clean copy of latest revision?
I'm moving a build process to use mercurial and want to get the working directory back to the state of the tip revision. Earlier runs of the build process will have modified some files and added some files that I don't want to commit, so I have local changes and files that aren't added to the reposi...
What is __gxx_personality_v0 for?
This is a second-hand question from an OS development site, but it made me curious since I couldn't find a decent explanation anywhere.
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How do I manipulate a variable whose name conflicts with PDB commands?
...be omitted unless the first word of the statement resembles a debugger command. [...]
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EOL conversion in notepad ++
...er on my windows machine, they occasionally have Macintosh EOL conversion, and when I edit/save them again they don't work properly on the unix server. I only use notepad ++ to edit files from this unix server, so is there a way to create a macro that automatically converts EOL to Unix format whene...
Django database query: How to get object by id?
...ror exception. What was confusing me was that the code below executed fine and returned a result set as expected:
Class.objects.all()
Tail of the traceback for the get() method:
File "django/db/models/loading.py", line 197, in get_models
self._populate()
File "django/db/models/loading.py", l...
Using IoC for Unit Testing
...y of the object graph when you do your unit tests.
– Anderson Imes
Sep 23 '09 at 14:26
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@Mark Se...
Hibernate: Automatically creating/updating the db tables based on entity classes
...uto
A value of create will create your tables at sessionFactory creation, and leave them intact.
A value of create-drop will create your tables, and then drop them when you close the sessionFactory.
Perhaps you should set the javax.persistence.Table annotation explicitly?
Hope this helps.
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Creating java date object from year,month,day
...ood Answer, but specify a time zone if known. A LocalDate has no time zone and so does not represent an exact moment on the timeline. If your context indicates a time zone, apply it to get a ZonedDateTime object: LocalDate.parse("2015-12-22").atStartOfDay( ZoneId.of( "America/Montreal" ) )
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