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Postgres unique constraint vs index
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Let's check uniqueness, just in case.
test=# insert into master values (0, 0);
INSERT 0 1
test=# insert into master values (0, 1);
ERROR: duplicate key value violates unique constraint "master_con_id_key"
DETAIL: Key (con_id)=(0) already exists.
test=# insert into master values (1, 0);
ERROR: ...
Difference between .tagName and .nodeName
What is the difference between $('this')[0].nodeName and $('this')[0].tagName ?
4 Answers
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Matplotlib: draw grid lines behind other graph elements
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According to this - http://matplotlib.1069221.n5.nabble.com/axis-elements-and-zorder-td5346.html - you can use Axis.set_axisbelow(True)
(I am currently installing matplotlib for the first time, so have no idea if that's correct - I just found it by googling "matp...
Linq to EntityFramework DateTime
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202
When using LINQ to Entity Framework, your predicates inside the Where clause get translated to ...
How do I select an element in jQuery by using a variable for the ID?
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190
row = $("body").find('#' + row_id);
More importantly doing the additional body.find has no imp...
Efficiently updating database using SQLAlchemy ORM
...on on commit you don't have any stale data issues.
In the almost-released 0.5 series you could also use this method for updating:
session.query(Stuff).update({Stuff.foo: Stuff.foo + 1})
session.commit()
That will basically run the same SQL statement as the previous snippet, but also select the c...
Reasons that the passed Intent would be NULL in onStartCommand
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50
I'm surprised there's no discussion of the incoming flags. I'm going to monitor this in the logs...
C/C++ NaN constant (literal)?
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answered May 22 '13 at 12:07
Mike SeymourMike Seymour
230k2424 gold badges396396 silver badges602602 bronze badges
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SQL Server indexes - ascending or descending, what difference does it make?
...ndex on a column or number of columns in MS SQL Server (I'm using version 2005), you can specify that the index on each column be either ascending or descending. I'm having a hard time understanding why this choice is even here. Using binary sort techniques, wouldn't a lookup be just as fast either ...
SVG Positioning
...just put the transformation in the g element:
<g transform="translate(20,2.5) rotate(10)">
<rect x="0" y="0" width="60" height="10"/>
</g>
Links: Example from the SVG 1.1 spec
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