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How to return an NSMutableArray from an NSSet

I'm able to put the contents of an NSSet into an NSMutableArray like this: 3 Answers ...
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Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio

I'm developing an app on Heroku with a Postgresql backend. Periodically, I get this error message when trying to access the database, both from the CLI and from loading a page on the server: ...
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How to get an array of unique values from an array containing duplicates in JavaScript? [duplicate]

Given a ['0','1','1','2','3','3','3'] array, the result should be ['0','1','2','3'] . 17 Answers ...
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MVC4 style bundle giving 403

When bundling/minification is enabled, some of my bundles seem to have an invalid URL in the browser (ending with a /), and IIS gives a 403 forbidden error, as if trying to list a folder's contents. ...
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Mercurial (hg) commit only certain files

I'm trying to commit only certain files with Mercurial. Because of of hg having auto-add whenever I try to commit a change it wants to commit all files. But I don't want that because certain files are not "ready" yet. ...
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Multiple Type Constraints in Swift

Let's say I have these protocols: 4 Answers 4 ...
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Understanding repr( ) function in Python

repr() : evaluatable string representation of an object (can "eval()" it, meaning it is a string representation that evaluates to a Python object) ...
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Preview an image before it is uploaded

I want to be able to preview a file (image) before it is uploaded. The preview action should be executed all in the browser without using Ajax to upload the image. ...
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How to get the nth element of a python list or a default if not available

I'm looking for an equivalent in python of dictionary.get(key, default) for lists. Is there any one liner idiom to get the nth element of a list or a default value if not available? ...
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Change GitHub Account username

I want to change my account's user name on GitHub, but I can't find how to do it. Is this possible at all? To clarify, I'm not talking about the user.name parameter in a git repository, but the username of the actual GitHub account. ...