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What does -D_XOPEN_SOURCE do/mean?
...le without this arg. I checked the gcc man page, but did not find this specific option. I did find XOPEN_SOURCE , but there was little explanation of what it does.
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Disable single warning error
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If you only want to suppress a warning in a single line of code, you can use the suppress warning specifier:
#pragma warning(suppress: 4101)
// here goes your single line of code where the warning occurs
For a single line ...
Using NSPredicate to filter an NSArray based on NSDictionary keys
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to clarify for new coders like me, the key line of code is 'NSArray *filtered = [data filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(BAR == %@)", @"foo"]];' where 'data' is the nsarray of nsdictionaries that is alre...
How do I use CMake?
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CMake takes a CMakeList file, and outputs it to a platform-specific build format, e.g. a Makefile, Visual Studio, etc.
You run CMake on the CMakeList first. If you're on Visual Studio, you can then load the output project/solution.
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Haskell, Lisp, and verbosity [closed]
...it for a new version of the language like in Haskell or Java. For example, if Haskell had this power there would no need for Haskell authors to write GHC extensions, has they could be implemented by developers themselves as macros at any time.
– mljrg
Sep 14 '1...
Concatenate text files with Windows command line, dropping leading lines
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I would add that if you want to concatenate ALL files you can do copy /b *.txt combined.txt without having to list the files individually.
– Phlucious
Jun 1 '15 at 18:13
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How to URL encode a string in Ruby
...whole URL, it does not selectively escapes query parameters, for instance, if you pass 'a=&!@&b=&$^' to CGI.escape it will escape whole thing with query separators & so this could be used only to query values. I suggest using addressable gem , it is more intellectual working with url...
Flask-SQLAlchemy import/context issue
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Can you do that multiple times? For example if I have more than one models.py file?
– Brad Wright
Mar 14 '12 at 6:50
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DateTimePicker: pick both date and time
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Set the Format to Custom and then specify the format:
dateTimePicker1.Format = DateTimePickerFormat.Custom;
dateTimePicker1.CustomFormat = "MM/dd/yyyy hh:mm:ss";
or however you want to lay it out. You could then type in directly the date/time. If you use M...
Why can't I use background image and color together?
...for an element.
You set the background-color and background-image styles. If the image is smaller than the element, you need to use the background-position style to place it to the right, and to keep it from repeating and covering the entire background you use the background-repeat style:
backgrou...