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Add unique constraint to combination of two columns
...
GO
-- succeeds:
INSERT dbo.Person(Name, Active, PersonNumber)
VALUES(N'foo', 1, 22);
GO
-- succeeds:
INSERT dbo.Person(Name, Active, PersonNumber)
VALUES(N'foo', 0, 22);
GO
-- fails:
INSERT dbo.Person(Name, Active, PersonNumber)
VALUES(N'foo', 1, 22);
GO
Data in the table after all of th...
Can a Windows batch file determine its own file name?
... called the batch file. So, if you are at a prompt in D:\dir1 and enter Y:\foo\bar.bat, if bar.bat has @echo %cd% then it will output D:\dir1.
– Preacher
Jun 28 '18 at 21:56
a...
What are the uses of “using” in C#?
...
using, in the sense of
using (var foo = new Bar())
{
Baz();
}
Is actually shorthand for a try/finally block. It is equivalent to the code:
var foo = new Bar();
try
{
Baz();
}
finally
{
foo.Dispose();
}
You'll note, of course, that the first snippet...
How to set default values in Rails?
...e ActiveRecord Callbacks).
So, IMO it should look something like:
class Foo < ActiveRecord::Base
after_initialize :assign_defaults_on_new_Foo
...
attr_accessible :bar
...
private
def assign_defaults_on_new_Foo
# required to check an attribute for existence to weed out existing ...
Make the current commit the only (initial) commit in a Git repository?
...nity wiki
7 revs, 4 users 73%Fred Foo
3
...
Maven: How to include jars, which are not available in reps into a J2EE project?
...local repository.
For example:
mvn install:install-file -Dfile=/usr/jars/foo.jar -DpomFile=/usr/jars/foo.pom
mvn install:install-file -Dfile=/usr/jars/bar.jar -DpomFile=/usr/jars/bar.pom
or just
mvn install:install-file -Dfile=ojdbc14.jar -DgroupId=com.oracle -DartifactId=ojdbc14 -Dversion=10....
How to optimize for-comprehensions and loops in Scala?
...imes) {
result = body()
count += 1
}
result
}
def foo() : Int= {
loop(5, 0) {
println("Hi")
return 5
}
}
foo()
This prints "Hi" only once.
Note that the return in foo exits foo (which is what you would expect). Since the bracketed expression is a ...
How to persist a property of type List in JPA?
...List<String> yourList;
In the database your list will be stored as foo;bar;foobar and in your Java object you will get a list with those strings.
Hope this is helpful to someone.
share
|
im...
How can I access and process nested objects, arrays or JSON?
...
const data = {
code: 42,
items: [{
id: 1,
name: 'foo'
}, {
id: 2,
name: 'bar'
}]
};
Let's assume we want to access the name of the second item.
Here is how we can do it step-by-step:
As we can see data is an object, hence we can access its prope...
Typescript: difference between String and string
...
I've added an answer to clarify that "foo" vs new String("foo") isn't a new distinction introduced by TypeScript - I don't think it's helpful to call one a JS type and the other a TS type.
– Joe Lee-Moyet
Jan 25 '16 at 13:46...