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How do I control how Emacs makes backup files?
... dirty that you haven't gotten around to putting into version control yet. Then, when you haven't been doing what you ought to, the editor saves your neck.
– Eponymous
Sep 5 '12 at 19:14
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What is the proper way to test if a parameter is empty in a batch file?
... to do it. By using ~, you strip the outer quotes if they are present, but then add them back manually (ensuring only one set). Moreover, you have to use quotes if the argument contains spaces (I learned this the hard way when my previous version of using # or brackets instead of quotes caused argum...
What is wrong with using goto? [duplicate]
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What is actually wrong with it? Why are goto's even possible in C++ then?
6 Answers
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Bash continuation lines
...ation lines
If this creates two arguments to echo and you only want one, then let's look at string concatenation. In bash, placing two strings next to each other concatenate:
$ echo "continuation""lines"
continuationlines
So a continuation line without an indent is one way to break up a string...
What is “stdafx.h” used for in Visual Studio?
...headers for your APIs in your stdafx.h file, in the appropriate order, and then start each of your CPP files at the very top with an #include "stdafx.h", before any meaningful content (just about the only thing allowed before is comments).
Under those conditions, instead of starting from scratch, t...
How can I specify a branch/tag when adding a Git submodule?
...mmit.
This is great for a submodule that does not change often, because then everyone on the project can have the submodule at the same commit.
If you want to move the submodule to a particular tag:
cd submodule_directory
git checkout v1.0
cd ..
git add submodule_directory
git commit -m "move...
How do I sort a vector of pairs based on the second element of the pair?
... {
Pred p;
return p(left.second, right.second);
}
};
then you can do this too:
std::sort(v.begin(), v.end(), sort_pair_second<int, int>());
or even
std::sort(v.begin(), v.end(), sort_pair_second<int, int, std::greater<int> >());
Though to be honest, this...
How to show the “Are you sure you want to navigate away from this page?” when changes committed?
Here in stackoverflow, if you started to make changes then you attempt to navigate away from the page, a javascript confirm button shows up and asks: "Are you sure you want to navigate away from this page?" blee blah bloo...
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How to “return an object” in C++?
...ne is put it in a smart pointer. (This should be done all the time anyway) Then you don't worry about deleting anything, things are exception-safe, etc. The only problem is it's likely slower than returning by value anyway!
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git: diff between file in local repo and origin
...te main branch (not necessary its master branch ANY branch) to FETCH_HEAD, then make a list of my modified file only and compare modified files to git difftool.
There are many difftool supported by git, I configured Meld Diff Viewer for good GUI comparison.
From the above script, I have prior knowl...