Displaying 2 results from an estimated 2 matches for "40x20".
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0x20
2008 Jul 30
1
problem with nested loops
Dear all,
I have a problem with constructing a nested loop.
I have two matrices:
pnr:
800 rows 14 columns
where rows are 40x20 meaning that 40 rows belong to one of twenty
objects in the matrix pnr
mvp:
20 rows and 14 columns
I want to:
calculate a distance value with the first 40 rows of pnr but 20times
with the 1st row of mvp
then the next 40 rows of pnr and 20times with the second row of mvp and
so on. in total 20...
2006 Mar 31
18
Modelling Foreign Keys
Can someone point me to a reference or tutorial that shows how to map
foreign key relationships in the model?
For example given:
Users
id
name
email
Posts
id
user_id
title
How do I associate user_id with users.id in the Post and User models?
has_many and belongs_to don''t seem to do it.
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