Posted by matijs
13/12/2010 at 23h14
On twitter, @clemensk asks:
Hey SQL experts, is it somehow possible in pure (My)SQL to extract a
nested set from a table full of paths (think: Category 1 > Category 2)?
To do this, you need to do two things: Extract the names of the nodes, and
calculate values for lft
and rgt
. Here’s my take on the latter part:
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Posted by matijs
10/12/2010 at 09h29
If you’re going to do this:
<typo:code lang=“ruby”>
def foo= f
@foo = f + “ bar”
end
</typo:code>
Then don’t first do this:
<typo:code lang=“ruby”>
attr_accessor :foo
</typo:code>
But instead do this:
<typo:code lang=“ruby”>
attr_reader :foo
</typo:code>
That way, there won’t be “method redefined” warnings all over the place.
Let’s make this more general: Before you release your gem, make sure it
runs without warnings. They should stick out like a sore thumb when you run
your tests, anyway.
Thanks.
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