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Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project
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edited Jul 14 at 16:31
Jerry Chong
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What's the best solution for OpenID with Django? [closed]
Please note : this is an ancient question with ancient answers. Most of the linked apps are now unmaintained. These days, most people seem to use django-allauth or python-social-auth . I'll leave the original question intact below for posterity's sake.
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What does “Could not find or load main class” mean?
...em that new Java developers experience is that their programs fail to run with the error message: Could not find or load main class ...
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Ship an application with a database
If your application requires a database and it comes with built in data, what is the best way to ship that application? Should I:
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How do I get around type erasure on Scala? Or, why can't I get the type parameter of my collections?
It's a sad fact of life on Scala that if you instantiate a List[Int], you can verify that your instance is a List, and you can verify that any individual element of it is an Int, but not that it is a List[Int], as can be easily verified:
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How to find the lowest common ancestor of two nodes in any binary tree?
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Nick Johnson is correct that a an O(n) time complexity algorithm is the best you can do if you have no parent pointers.) For a simple recursive version of that algorithm see the code in Kinding's post which runs in O(n) time.
But keep in mind that if your nodes have parent p...
Is 'switch' faster than 'if'?
Is a switch statement actually faster than an if statement?
12 Answers
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UIScrollView not scrolling
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It's always good to show a complete working code snippet:
// in viewDidLoad (if using Autolayout check note below):
UIScrollView *myScrollView;
UIView *contentView;
// scrollview won't scroll unless content size explicitly ...
How to Vertical align elements in a div?
I have a div with two images and an h1 . All of them need to be vertically aligned within the div, next to each other.
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How to get a random number in Ruby
...six-sided die, you'd use: 1 + rand(6). A roll in craps could be simulated with 2 + rand(6) + rand(6).
Finally, if you just need a random float, just call rand with no arguments.
As Marc-André Lafortune mentions in his answer below (go upvote it), Ruby 1.9.2 has its own Random class (that M...