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✔ Checkmark selected row in UITableViewCell

I am an iOS development newbie. I want to add a checkmark to my UITableViewCell when it is selected. The checkmark should be removed when another row is selected. How would I do this? ...
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Getting the encoding of a Postgres database

I have a database, and I need to know the default encoding for the database. I want to get it from the command line. 6 Answ...
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JavaScript object: access variable property by name as string [duplicate]

If I have a javascript object that looks like below 3 Answers 3 ...
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PHP: How to remove all non printable characters in a string?

I imagine I need to remove chars 0-31 and 127, 17 Answers 17 ...
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Detect backspace in empty UITextField

Is there any way to detect when the Backspace / Delete key is pressed in the iPhone keyboard on a UITextField that is empty? I want to know when Backspace is pressed only if the UITextField is empty. ...
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How to reshape data from long to wide format

I'm having trouble rearranging the following data frame: 11 Answers 11 ...
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Xcode 4: How do you view the console?

I can't seem to find a way to have the console run (to show NSLog comments) in XCode 4. The normal method for the previous version of XCode does not work. Does anyone have an idea of how to accomplish this? ...
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'AND' vs '&&' as operator

I have a codebase where developers decided to use AND and OR instead of && and || . 10 Answers ...
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ScrollIntoView() causing the whole page to move

I am using ScrollIntoView() to scroll the highlighted item in a list into view. When I scroll downwards ScrollIntoView(false) works perfectly. But when I scroll upwards, ScrollIntoView(true) is causing the whole page to move a little which I think is intended. Is there a way to avoid the whole page...
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R object identification

I am often ending up with a function producing output for which I don't understand the output data type. I'm expecting a list and it ends up being a list of lists or a data frame or something else. What's a good method or workflow for figuring out the output data type when first using a function? ...