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Bash command to sum a column of numbers [duplicate]
...mn of numbers. I just want a quick one liner that will do something essentially like this:
10 Answers
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Should I prefer pointers or references in member data?
... be null. This can be an advantage, but if the code ever needs changing to allow rebinding or for the member to be null, all uses of the member need to change
unlike pointer members, references can't easily be replaced by smart pointers or iterators as refactoring might require
Whenever a reference ...
rsync error: failed to set times on “/foo/bar”: Operation not permitted
...rom rsync and the initial things I'm finding from web searches (as well as all the usual chmod'ing) are not solving it:
9 A...
How can I get enum possible values in a MySQL database?
...want to populate my dropdowns with enum possible values from a DB automatically. Is this possible in MySQL?
24 Answers
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git - merge conflict when local is deleted but file exists in remote
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You should resolve the conflicts as you see fit. If the file really is supposed to be removed, and you will be publishing that change to origin, remove it again:
git rm path/to/file
If the file should in fact be tracked still, add it (the version in the work tree will be the version f...
Should I use a data.frame or a matrix?
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Something not mentioned by @Michal is that not only is a matrix smaller than the equivalent data frame, using matrices can make your code far more efficient than using data frames, often considerably so. That is one reason why internally, a lot of R functions will coerce to matrices data th...
Tab key == 4 spaces and auto-indent after curly braces in Vim
...verting spaces to tabs, bad!), makes the tab key == 4 spaces, and automatically indent code after curly brace blocks like Emacs does?
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How to force child div to be 100% of parent div's height without specifying parent's height?
... a look at Equal Height Columns with Cross-Browser CSS and No Hacks.
Basically, doing this with CSS in a browser compatible way is not trivial (but trivial with tables) so find yourself an appropriate pre-packaged solution.
Also, the answer varies on whether you want 100% height or equal height. U...
Is it possible to have different Git configuration for different projects?
.gitconfig is usually stored in the user.home directory.
12 Answers
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http HEAD vs GET performance
... would focus on designing the ideal REST interface. A clean REST API is usually more valuable in the long run than a kludgey API that may or may not be faster. I'm not discouraging the use of HEAD, just suggesting that you only use it if it's the "right" design.
If the information you need really i...