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When does static class initialization happen?
When are static fields initialized? If I never instantiate a class, but I access a static field, are ALL the static blocks and private static methods used to instantiate private static fields called (in order) at that instant?
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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
Why is it that scanf() needs the l in " %lf " when reading a double , when printf() can use " %f " regardless of whether its argument is a double or a float ?
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Which data type for latitude and longitude?
I am newbie to PostgreSQL and PostGIS. I want to store latitude and longitude values in PostgreSQL 9.1.1 database table. I will calculate distance between two points, find nearer points by using this location values.
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Default height for section header in UITableView
I want to set the height of the first header in my UITableView. For the other headers I want them to remain the default height. What value/constant can I put in place of "someDefaultHeight" in the code below?
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Changing position of the Dialog on screen android
I made a simple AlertDialog in my Activity :
11 Answers
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Make an existing Git branch track a remote branch?
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Given a branch foo and a remote upstream:
As of Git 1.8.0:
git branch -u upstream/foo
Or, if local branch foo is not the current branch:
git branch -u upstream/foo foo
Or, if you like to type longer commands, these are equivalent to the above two:
git branch --set-upstrea...
How to detect unused methods and #import in Objective-C
After working a long time on an iPhone app, I realized that my code is quite dirty, containing several #import and methods that are not called or useful at all.
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Is it valid to have a tag inside another tag?
Are <section> tags allowed to be included within another <section> tag? Will it validate in HTML5?
3 Answer...
Rebasing remote branches in Git
I am using an intermediate Git repository to mirror a remote SVN repository, from which people can clone and work on. The intermediate repository has it's master branch rebased nightly from the upstream SVN, and we are working on feature branches. For example:
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Append an object to a list in R in amortized constant time, O(1)?
If I have some R list mylist , you can append an item obj to it like so:
17 Answers
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