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AES Encryption for an NSString on the iPhone

...use the mutableBytes property for the byte pointer and then just resize by setting it's length property. 3. Using string directly for an encryption is very insecure, a derived key should be used such as created by PBKDF2. – zaph Jan 19 '16 at 1:15 ...
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Get difference between two lists

... In [5]: list(set(temp1) - set(temp2)) Out[5]: ['Four', 'Three'] Beware that In [5]: set([1, 2]) - set([2, 3]) Out[5]: set([1]) where you might expect/want it to equal set([1, 3]). If you do want set([1, 3]) as your answer, you'll n...
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Transpose a data frame

... also, setnames(t_mtcars, rownames(mtcars)) would be the data.table-way of setting names on a data.table (and if using a data.table object you wouldn't set the rownames) – SymbolixAU Oct 5 '17 ...
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Run a Java Application as a Service on Linux

...irtual hosted Linux solution. The application runs all the time listening for socket connections and creating new handlers for them. It is a server side implementation to a client-server application. ...
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Show diff between commits

... Try git diff k73ud^..dj374 to make sure to include all changes of k73ud in the resulting diff. git diff compares two endpoints (instead of a commit range). Since the OP want to see the changes introduced by k73ud, he/she needs to di...
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Haskell: Lists, Arrays, Vectors, Sequences

... editor after snippets, if snippets enabled if (StackExchange.settings.snippets.snippetsEnabled) { StackExchange.using("snippets", function() { createEditor(); }); } else { createEditor(); ...
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How do I programmatically “restart” an Android app?

...kill/restart an application on Android. In my use case I want to factory-reset my application in a specific case where a server sends a specific information to the client. ...
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Detect iPad users using jQuery?

Is there a way to detect if the current user is using an iPad using jQuery/JavaScript? 4 Answers ...
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Check empty string in Swift?

In Objective C, one could do the following to check for strings: 14 Answers 14 ...
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Find if variable is divisible by 2

How do I figure out if a variable is divisible by 2? Furthermore I need do a function if it is and do a different function if it is not. ...