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Postgresql: Conditionally unique constraint
...traint" doesn't show up as a constraint, but nonetheless gives the desired error of ERROR: duplicate key value violates unique constraint "stop_myc"
– EoghanM
Apr 26 '13 at 17:08
...
vertical align middle in
... CSS3 ?
– Kiquenet
Jan 17 '18 at 16:05
@Kiquenet, 92% of the global market caniuse.com/#search=align-items
...
How do I read / convert an InputStream into a String in Java?
...est):
Benchmark Mode Cnt Score Error Units
8. ByteArrayOutputStream and read (JDK) avgt 10 1,343 ± 0,028 us/op
6. InputStreamReader and StringBuilder (JDK) avgt 10 6,980 ± 0,404 us/op
10. BufferedInputStream, ByteArrayOutputStream ...
Differences in auto-unboxing between Java 6 vs Java 7
... reference type may undergo casting conversion to a primitive type without error, by unboxing conversion.
Java 5/6:
A value of a reference type can be cast to a primitive type by unboxing conversion (§5.1.8).
The Java 7 JLS also contains a table (table 5.1) of allowed conversions (this tab...
Using LINQ to concatenate strings
.../5791981
– joeriks
Jun 16 '13 at 13:05
1
...
How to output git log with the first line only?
...|
edited Dec 20 '10 at 11:05
answered Dec 20 '10 at 10:43
G...
What is a build tool?
...
Build Process is a Process of compiling your source code for any errors using some build tools and creating builds(which are executable versions of the project). We(mainly developers) do some modifications in the source code and check-in that code for the build process to happen. After the...
Cocoa Touch: How To Change UIView's Border Color And Thickness?
...answer.
– GoodSp33d
Jul 10 '14 at 5:05
6
#import <QuartzCore/QuartzCore.h> is no longer nee...
How many files can I put in a directory?
...ust fine - it's the call to exec with that many arguments that returns the error.
– jw013
Nov 30 '12 at 20:34
...
Run a single migration file
... out of the ruby file:
rails console
>> require "db/migrate/20090408054532_add_foos.rb"
>> AddFoos.up
Note: newer versions of rails may require AddFoos.new.up rather than AddFoos.up.
An alternative way (without IRB) which relies on the fact that require returns an array of class name...