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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)

...(variable) name return the value inside the variable name, but what is $(command) supposed to return? Does it return the value after executing the command? In that case, we can use ` to execute the command. ...
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Creating a new dictionary in Python

...parently CPython 2.7 dict() is slower (6 times slower?), See: doughellmann.com/2012/11/… In any case I am starting to prefer the constructor syntax anyways since I find it easier to type and move code between dicts and function calls. – David Wheaton Mar 5 '1...
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C++ Convert string (or char*) to wstring (or wchar_t*)

...ng wide = converter.from_bytes(narrow_utf8_source_string); Longer online compilable and runnable example: (They all show the same example. There are just many for redundancy...) http://ideone.com/KA1oty http://ide.geeksforgeeks.org/5pRLSh http://rextester.com/DIJZK52174 Note (old): As pointe...
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How to change the background color of a UIButton while it's highlighted?

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Merge two Git repositories without breaking file history

...ories? ) and following those instructions mostly works, except that when I commit the subtree merge all of the files from the old repositories are recorded as new added files. I can see the commit history from the old repositories when I do git log , but if I do git log <file> it shows onl...
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How to concatenate strings in django templates?

... instead of the extend tag, but apparently it just works. Though I would recommend Ahsan's own answer as it also workes and is (in my opinion) semantically more correct and raises less confusion. – gitaarik Apr 2 '13 at 16:23 ...
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How to check if an object is a certain type

...e type of another known type. Once you have the two types, you can simply compare them using the Is operator. So your code should actually be written like this: Sub FillCategories(ByVal Obj As Object) Dim cmd As New SqlCommand("sp_Resources_Categories", Conn) cmd.CommandType = CommandType...
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Multiple levels of 'collection.defaultdict' in Python

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How to connect to SQL Server database from JavaScript in the browser?

...he only person here who actually shows that it is possible (although not recommended). – TheTXI May 13 '09 at 12:41 6 ...
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Check if user is using IE

...ism and others: check this answer that also works for IE 11: stackoverflow.com/a/21712356/114029 – Leniel Maccaferri Nov 16 '14 at 1:10 ...