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cancelling queued performSelector:afterDelay calls

does anybody know if it is possible to cancel already queued selector events from the event stack or timer stack (or whatever mechanism it is that is utilized by the API) when you call performSelector:withObject:afterDelay ? ...
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How do I get the filepath for a class in Python?

Given a class C in Python, how can I determine which file the class was defined in? I need something that can work from either the class C, or from an instance off C. ...
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Can someone explain the HTML5 aria-* attribute?

I wanted to know what the aria-* attributes are used for. What values can they have, and are they defined values or can I create my own values? ...
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Escaping keyword-like column names in Postgres

If the column in Postgres' table has the name year , how should look INSERT query to set the value for that column? 3 An...
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Does Ruby have a string.startswith(“abc”) built in method?

Does Ruby have a some_string.starts_with("abc") method that's built in? 4 Answers 4 ...
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Select between two dates with Django

I am looking to make a query that selects between dates with Django. 4 Answers 4 ...
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How to make vi redraw screen?

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Getting the parent div of element

...ally simple but I'm having trouble with it. How do I get a parent div of a child element? 7 Answers ...
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Join between tables in two different databases?

In MySQL, I have two different databases -- let's call them A and B . 4 Answers 4 ...
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How do you downgrade rubygems?

I have rubygems 1.3.1 installed but I want to go back to 1.2.0. What's the command to downgrade rubygems? 6 Answers ...