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Node.js: Difference between req.query[] and req.params
...fference between obtaining QUERY_STRING arguments via req.query[myParam] and req.params.myParam ? If so, when should I use which?
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Jump to matching XML tags in Vim
Vim % operator jumps to matching parentheses, comment ends and a few other things. It doesn't, however, match XML tags (or any other tag, to the best of my knowledge).
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Difference Between ViewData and TempData?
I know what ViewData is and use it all the time, but in ASP.NET Preview 5 they introduced something new called TempData.
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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
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Since С99 the matching between format specifiers and floating-point argument types in C is consistent between printf and scanf. It is
%f for float
%lf for double
%Lf for long double
It just so happens that when arguments of type float are passed as variadic parameters,...
How can I add an ampersand for a value in a ASP.net/C# app config file value
... a C# program with values in a config file. What I want is to store ampersands for an url value like...
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git: How to diff changed files versus previous versions after a pull?
...pull" I often want to know what changed between the last version of a file and the new one. Say I want to know what someone else committed to a particular file.
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Set “this” variable easily?
I have a pretty good understanding of Javascript, except that I can't figure out a nice way to set the "this" variable. Consider:
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What does “atomic” mean in programming?
... written using two separate operations: one that writes the first 32 bits, and a second one which writes the last 32 bits. That means that another thread might read the value of foo, and see the intermediate state.
Making the operation atomic consists in using synchronization mechanisms in order t...
Selecting pandas column by location
I'm simply trying to access named pandas columns by an integer.
5 Answers
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How to detect the device orientation using CSS media queries?
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CSS to detect screen orientation:
@media screen and (orientation:portrait) { … }
@media screen and (orientation:landscape) { … }
The CSS definition of a media query is at http://www.w3.org/TR/css3-mediaqueries/#orientation
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