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How do you dismiss the keyboard when editing a UITextField

I know that I need to tell my UITextField to resign first responder when I want to dismis the keyboard, but I'm not sure how to know when the user has pressed the "Done" key on the keyboard. Is there a notification I can watch for? ...
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403 Forbidden vs 401 Unauthorized HTTP responses

...es not have sufficient privileges (they are not logged in or do not belong to the proper user group), what is the proper HTTP response to serve? ...
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How to configure Visual Studio to use Beyond Compare

I would like to configure Visual Studio to open Beyond Compare by default as the diff tool. How can I do this? 10 Answers ...
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Most pythonic way to delete a file which may not exist

I want to delete the file filename if it exists. Is it proper to say 13 Answers 13 ...
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Add leading zeroes/0's to existing Excel values to certain length

There are many, many questions and quality answers on SO regarding how to prevent leading zeroes from getting stripped when importing to or exporting from Excel. However, I already have a spreadsheet that has values in it that were truncated as numbers when, in fact, they should have been handled a...
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How to make a div with no content have a width?

I am trying to add a width to a div , but I seem to be running into a problem because it has no content. 11 Answers ...
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How to create relationships in MySQL

...ing' databases, and everyone is using Access. Bored with this, I am trying to do what the rest of the class is doing, but with raw SQL commands with MySQL instead of using Access. ...
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Dump a mysql database to a plaintext (CSV) backup from the command line

I'd like to avoid mysqldump since that outputs in a form that is only convenient for mysql to read. CSV seems more universal (one file per table is fine). But if there are advantages to mysqldump, I'm all ears. Also, I'd like something I can run from the command line (linux). If that's a mysql s...
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Unzip files programmatically in .net

I am trying to programatically unzip a zipped file. 15 Answers 15 ...
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Xcode 5.1 - No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=x86_64, VALID_ARCHS=i

After updating to Xcode 5.1, I can no longer build my project for the 64-bit simulator, receiving this error: 18 Answers ...