Displaying 3 results from an estimated 3 matches for "c2s".
Did you mean:
c2h
2006 Jan 05
2
has_many - when are child objects created?
I has several model objects that flow down like a tree:
Class1 has_many Class2
Class2 has_many Class3
and so on.
when are the child records actually created?
If I do:
c1 = Class1.find(:all)
are the child objects (C2s below) created then or not until i do something like:
c2s = c1.C2s while iterating through the c1s?
If the form, that''s cool, no problem, but If I''ve got say 1000 recs in
each of the tables corresponding to the has many relationship, that
could be quite a problem, right? And I&...
2005 Dec 05
1
data frames, na.omit, and sums
...entries in each row of a data frame, and
(1) using na.omit() and na.action() with rows of data from a frame.
I have a data frame that contains information about when my academic
department offered courses and their enrollments. The data frame
looks something like
sem year C1e C1s C2e C2s
Fall 1991 10 2 NA NA
Spring 1992 3 1 8 1
Summer 1992 NA NA 100 10
where C?e represents a specific course's enrollment that semester and
C?s represents the number of sections of that course offered. The
frame is filled with integers and NAs. The data frame is of...
2017 Jul 19
3
CentOS SDR Support
Several weeks ago, we posted a message seeking information about
time sources.? There were many helpful and educational responses.
An excerpt from one of the responses is included below.? We have
been following up with regard to how SDR capabilities might be
used for obtaining time using SDR dongles as well as using the
time source product referenced in that response.
Our SDR investigation has