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Create an empty data.frame
...hout any rows. Basically, I want to specify the data types for each column and name them, but not have any rows created as a result.
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C++ equivalent of StringBuffer/StringBuilder?
Is there a C++ Standard Template Library class that provides efficient string concatenation functionality, similar to C#'s StringBuilder or Java's StringBuffer ?
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Prevent onmouseout when hovering child element of the parent absolute div WITHOUT jQuery
...tion onMouseOut(event) {
//this is the original element the event handler was assigned to
var e = event.toElement || event.relatedTarget;
if (e.parentNode == this || e == this) {
return;
}
alert('MouseOut');
// handle mouse event here!
}
document...
Why doesn't list have safe “get” method like dictionary?
...sociated with names) where it is inefficient to check if a key is present (and return its value) without throwing an exception, while it is super trivial to avoid exceptions accessing list elements (as the len method is very fast). The .get method allows you to query the value associated with a nam...
rvm installation not working: “RVM is not a function”
...inal after this setting the flag.
Sometimes it is required to set the command to /bin/bash --login.
For remote connections it is important to understand the differene between running interactive ssh session and executing single commands.
While running ssh server and then working with the server...
Count number of lines in a git repository
...at you want:
git ls-files | xargs cat | wc -l
But with more information and probably better, you can do:
git ls-files | xargs wc -l
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sql primary key and index
...x does no good, but the only harm (very small) is the additional file size and row-creation overhead.
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phpmyadmin logs out after 1440 secs
In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database.
24 Answers
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Parallelize Bash script with maximum number of processes
...ution. Except, since I'm paranoid, I always like to use find [...] -print0 and xargs -0.
– amphetamachine
Mar 22 '10 at 2:31
7
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How to see the changes between two commits without commits in-between?
... The advantage of using git apply vs. patch is you can include renames and some other changes that are specific to git. I like using git format-patch and git am.
– Russell
Jun 12 '12 at 11:23
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