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What is the difference between atan and atan2 in C++?
...= atan() <= π/2), regardless of the original input to the tangent.
In order to get back the full information, we must not use the result of the division sin(α) / cos(α) but we have to look at the values of the sine and cosine separately. And this is what atan2() does. It takes both, the sin(...
What does PermGen actually stand for?
...know what PermGen is, what it's used for, why it fails, how to increase it etc.
8 Answers
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Passing arguments to an interactive program non-interactively
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Clicking URLs opens default browser
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“X does not name a type” error in C++
... before you use it as a member. This is solved by reversing the definition order. However, you have a cyclic dependency: if you move MyMessageBox above User, then in the definition of MyMessageBox the name User won't be defined!
What you can do is forward declare User; that is, declare it but don't...
Kill a postgresql session/connection
... ActiveRecord::Base.connection.select_all("select * from pg_stat_activity order by procpid;").each do |x|
if config['database'] == x['datname'] && x['current_query'] =~ /<IDLE>/
ActiveRecord::Base.connection.execute("select pg_terminate_backend(#{x['procpid']})")
e...
Keyword not supported: “data source” initializing Entity Framework Context
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How can I see incoming commits in git? [duplicate]
...ster).
I'd just do
git fetch URL branch
followed by one (in decreasing order of preference):
# note 3 dots in next 3 commands
gitk HEAD...FETCH_HEAD
# shows all commits on both sides since the "fork" point
gitk --cherry-pick HEAD...FETCH_HEAD
# as above but skips identical patches so yo...
Dismiss keyboard by touching background of UITableView
...ableView background, footer view, header view and on UILabels inside cells etc.
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How can I read a text file in Android?
...n the application folder. Where should I put this text file (mani.txt) in order to read it correctly?
7 Answers
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