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When do I need to use a semicolon vs a slash in Oracle SQL?
....0 - Production
With the Partitioning and OLAP options
SQL> drop table foo;
Table dropped.
SQL> /
drop table foo
*
ERROR at line 1:
ORA-00942: table or view does not exist
In this case one actually notices the error.
But assuming there is a SQL script like this:
drop table...
Must Dependency Injection come at the expense of Encapsulation?
...er of the dependency must know both that the object in question requires a Foo, and the provider has to have a way of providing the Foo to the object.
Classically this latter case is handled as you say, through constructor arguments or setter methods. However, this is not necessarily true - I know...
Should I use alias or alias_method?
...dict: Use alias_method - it gives you a ton more flexibility.
Usage:
def foo
"foo"
end
alias_method :baz, :foo
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...
jQuery event to trigger action when a div is made visible
...he clearInterval() upon successful call-out.
Here's an example:
function foo() {
$('.visibilityCheck').each(function() {
if ($(this).is(':visible')){
// do something
}
});
}
window.setInterval(foo, 100);
You can also perform some performance improvements on i...
Static member functions error; How to properly write the signature?
...
I'm guessing you've done something like:
class Foo
{
static void Bar();
};
...
static void Foo::Bar()
{
...
}
The "static void Foo::Bar" is incorrect. You don't need the second "static".
...
Is there a ceiling equivalent of // operator in Python?
...
so foobar = math.ceil(foo / bar)? Hmm, I can live with that, don't know of anywhere I wanted to use that, was just curious, thanks
– Cradam
Feb 11 '13 at 22:51
...
What is choice_set in this Django app tutorial?
...rom Question too, automatically generating a field on each instance called foo_set where Foo is the model with a ForeignKey field to that model.
choice_set is a RelatedManager which can create querysets of Choice objects which relate to the Question instance, e.g. q.choice_set.all()
If you don't l...
Why is “import *” bad?
...hat.
Also, it has a concrete possibility of hiding bugs.
import os, sys, foo, sqlalchemy, mystuff
from bar import *
Now, if the bar module has any of the "os", "mystuff", etc... attributes, they will override the explicitly imported ones, and possibly point to very different things. Defining __a...
Begin, Rescue and Ensure in Ruby?
...finitions are implicitly also exception blocks, so instead of writing
def foo
begin
# ...
rescue
# ...
end
end
you write just
def foo
# ...
rescue
# ...
end
or
def foo
# ...
ensure
# ...
end
The same applies to class definitions and module definitions.
However, in the...
Check if a temporary table exists and delete if it exists before creating a temporary table
...blem.
The following works fine for me in SQL Server 2005, with the extra "foo" column appearing in the second select result:
IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results
GO
CREATE TABLE #Results ( Company CHAR(3), StepId TINYINT, FieldId TINYINT )
GO
select company, stepid, fie...