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How to get the first line of a file in a bash script?
...in a bash variable the first line of a file. I guess it is with the grep command, but it is any way to restrict the number of lines?
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How to add a changed file to an older (not last) commit in Git
I have changed several things over the last hour and committed them step by step, but I just realized I've forgot to add a changed file some commits ago.
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WPF - How to force a Command to re-evaluate 'CanEm>x m>ecute' via its CommandBindings
I have a Menu where each MenuItem in the hierarchy has its Command property set to a RoutedCommand I've defined. The associated CommandBinding provides a callback for the evaluation of CanEm>x m>ecute which controls the enabled state of each MenuItem .
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How do I read an entire file into a std::string in C++?
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One way is to flush the stream buffer into a separate memory stream, and then convert that to std::string:
std::string slurp(std::ifstream& in) {
std::ostringstream sstr;
sstr << in.rdbuf();
return sstr.str();
}
This is nicely co...
JPA: How to have one-to-many relation of the same Entity type
There's an Entity Class "A". Class A might have children of the same type "A". Also "A" should hold it's parent if it is a child.
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Easiest way to toggle 2 classes in jQuery
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If your element em>x m>poses class A from the start, you can write:
$(element).toggleClass("A B");
This will remove class A and add class B. If you do that again, it will remove class B and reinstate class A.
If you want to match the ele...
Creating an indem>x m> on a table variable
...test version I'll address that first.
SQL Server 2014
In addition to the methods of adding constraint based indem>x m>es discussed below SQL Server 2014 also allows non unique indem>x m>es to be specified directly with inline syntam>x m> on table variable declarations.
Em>x m>ample syntam>x m> for that is below.
/*SQL ...
Is ASCII code 7-bit or 8-bit?
My teacher told me ASCII is 8-bit character coding scheme. But it is defined only for 0-127 codes which means it can be fit into 7-bits. So can't it be argued that ASCII bit is actually 7-bit code?
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How can I change the color of a Google Maps marker?
I'm using the Google Maps API to build a map full of markers, but I want one marker to stand out from the others. The simplest thing to do, I think, would be to change the color of the marker to blue, instead of red. Is this a simple thing to do or do I have to create a whole new icon somehow? If I ...
CMake output/build directory
I'm pretty new to CMake, and read a few tutorials on how to use it, and wrote some complicated 50 lines of CMake script in order to make a program for 3 different compilers. This probably concludes all my knowledge in CMake.
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