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Ruby on Rails: How can I revert a migration with rake db:migrate?
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I'm getting an UnknownMigrationVersionError but I figured out it's because my migrations are inside db/migrate/main , does anybody know a workaround for this to have db:migrate:down look inside that specific directory or the migrate subdirectories?
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Django - How to rename a model field using South?
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You can use the db.rename_column function.
class Migration:
def forwards(self, orm):
# Rename 'name' field to 'full_name'
db.rename_column('app_foo', 'name', 'full_name')
def backwards(self, orm):
# Rename 'full_name' field to 'name'
db.rename_column...
Refresh all files in buffer from disk in vim
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Read the documentation for bufdo, it should do what you want.
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Gradle: How to Display Test Results in the Console in Real Time?
...lt of each test while they are running. Downside is that you will get far more output for other tasks also.
gradle test -i
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How does '20 seconds' work in Scala?
.... Since 20 is an Int and Int has no seconds method, the compiler searches for an implicit conversion that takes an Int and returns something that does have a seconds method, with the search constrained by the scope of your method call.
You have imported DurationInt into your scope. Since DurationIn...
How to get the name of enumeration value in Swift?
...2) you can now print type names and enum cases by default using print(_:), or convert to String using String's init(_:) initializer or string interpolation syntax. So for your example:
enum City: Int {
case Melbourne = 1, Chelyabinsk, Bursa
}
let city = City.Melbourne
print(city)
// prints "Me...
How to make exe files from a node.js app?
...ternatives, both free and commercial. I haven't used any of them but in theory they should work:
Iexpress (native windows tool)
Quick Batch File Compiler (commercial)
BoxedApp Packer
"Advanced" Batch To EXE Converter" (freeware)
Most will require you to keep the batch file as main executable, an...
Creating runnable JAR with Gradle
Until now I created runnable JAR files via the Eclipse "Export..." functionallity but now I switched to IntelliJ IDEA and Gradle for build automation.
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How to make a class conform to a protocol in Swift?
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Type 'CellDatasDataSource' does not conform to protocol 'NSObjectProtocol'
You have to make your class inherit from NSObject to conform to the NSObjectProtocol. Vanilla Swift classes do not. But many parts of UIKit expect NSObjects.
class CustomDataSource : NSOb...
Does bit-shift depend on endianness?
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Endianness is the way values are stored in memory. When loaded into the processor, regardless of endianness, the bit shift instruction is operating on the value in the processor's register. Therefore, loading from memory to processor is the equivalent of conve...