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How do I set default values for functions parameters in Matlab?
...n, nargchk, etc. They're useful functions for this sort of thing. varargs allow you to leave a variable number of final arguments, but this doesn't get you around the problem of default values for some/all of them.
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bundler vs RVM vs gems vs RubyGems vs gemsets vs system ruby [closed]
...encies. Rubygems is the name of the package manager - the tool used to install the packages (while the gems are the packages themselves). Rubygems is now part of Ruby.
Bundler is what makes managing gems bearable. Based on your Gemfile, a simple call to bundler using bundle install will download an...
Status bar won't disappear
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How to do this globally?
– jjxtra
Aug 25 '13 at 19:44
16
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Stash changes while keeping the changes in the working directory in Git
...stashes your changes, but keeps them in the working directory too? So basically a git stash; git stash apply in one step?
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When exactly is it leak safe to use (anonymous) inner classes?
...y tough question. While you may think it is just one question, you are actually asking several questions at once. I'll do my best with the knowledge that I have to cover it and, hopefully, some others will join in to cover what I may miss.
Nested Classes: Introduction
As I'm not sure how comfortab...
Reflection: How to Invoke Method with parameters
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Change "methodInfo" to "classInstance", just like in the call with the null parameter array.
result = methodInfo.Invoke(classInstance, parametersArray);
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Is it possible to disable the network in iOS Simulator?
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Network Link Conditioner allows you to specify a percentage of packets to be dropped, but as far as I've seen there's unfortunately no way to disable all connectivity.
– modocache
Apr 9 '12 at 8:57
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How do I determine the size of an object in Python?
...turn the size of an object in bytes.
The object can be any type of object.
All built-in objects will return
correct results, but this does not
have to hold true for third-party
extensions as it is implementation
specific.
Only the memory consumption directly attributed to the object is
accounted for...
Set up a scheduled job?
...Django, and I'm curious if there is a way to schedule a job to run periodically.
24 Answers
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Counting null and non-null values in a single query
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If I understood correctly you want to count all NULL and all NOT NULL in a column...
If that is correct:
SELECT count(*) FROM us WHERE a IS NULL
UNION ALL
SELECT count(*) FROM us WHERE a IS NOT NULL
Edited to have the full query, after reading the comments :]
S...