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Foreign Key to non-primary key
...primary key just because it semantically has more importance and describes my model best. I too would like to have a foreign key reference a newly created surrogate key for the sake of performance (as noted above). Does anyone foresee any problems with such a setup?
– Daniel ...
Validation of radio button group using jQuery validation plugin
...uired and jquery will take care of the rest:
<input type="radio" name="myoptions" value="blue" class="required"> Blue<br />
<input type="radio" name="myoptions" value="red"> Red<br />
<input type="radio" name="myoptions" value="green"> Green
The above would require a...
Sort an Array by keys based on another Array?
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for my case it's array_replace instead of array_merge. array_merge combine both value instead of replacing the second array into the ordered keys.
– neofreko
Nov 12 '14 at 6:26
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How can I check if multiplying two numbers in Java will cause an overflow?
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I should mention that a and b are always non-negative in my scenario, which would simplify this approach somewhat.
– Steve McLeod
Nov 1 '09 at 18:17
3
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Why do stacks typically grow downwards?
...istoric rationale, I can't say for certain (because I didn't design them). My thoughts on the matter are that early CPUs got their original program counter set to 0 and it was a natural desire to start the stack at the other end and grow downwards, since their code naturally grows upward.
As an ...
Difference between FetchType LAZY and EAGER in Java Persistence API?
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I'd like to add some more info to this answer from my book - To save memory, Lazy loading is generally used for one to many and many to many relationships. For one to one, generally Eager is used.
– Erran Morad
May 10 '14 at 5:53
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rspec 3 - stub a class method
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You should do
allow(MyMod::Utils).to receive(:find_x).and_return({something: 'testing'})
Check out the doco Method stubs.
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Should I use a data.frame or a matrix?
...[3,] 3 3
[4,] 4 4
[5,] 5 5
[6,] 6 6
I nearly always use a data frame for my data analysis tasks as I often have more than just numeric variables. When I code functions for packages, I almost always coerce to matrix and then format the results back out as a data frame. This is because data frames a...
jQuery SVG vs. Raphael [closed]
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I've recently used both Raphael and jQuery SVG - and here are my thoughts:
Raphael
Pros: a good starter library, easy to do a LOT of things with SVG quickly. Well written and documented. Lots of examples and Demos. Very extensible architecture. Great with animation.
Cons: is a layer ...
How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...es have taken effect, run perl -V.
$ perl -V
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%ENV:
PERL5LIB="/home/myuser/test"
@INC:
/home/myuser/test
/usr/lib/perl5/site_perl/5.18.0/x86_64-linux-thread-multi-ld
/usr/lib/perl5/site_perl/5.18.0
/usr/lib/perl5/5.18.0/x86_64-linux-thread-multi-ld
/usr/lib/perl5/5.18.0
.
-I command-l...