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MySQL: how to get the difference between two timestamps in seconds
...ifference between two timestamps in seconds, or would I need to do that in PHP? And if so, how would I go about doing that?
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How can I swap positions of two open files (in splits) in vim?
... 'hide buf' markedBuf
endfunction
nmap <silent> <leader>mw :call MarkWindowSwap()<CR>
nmap <silent> <leader>pw :call DoWindowSwap()<CR>
To use (assuming your mapleader is set to \) you would:
Move to the window to mark for the swap via
ctrl-w movement
Type ...
Can we call the function written in one JavaScript in another JS file?
...
The answer above has an incorrect assumption that the order of inclusion of the files matter. As the alertNumber function is not called until the alertOne function is called. As long as both files are included by time alertOne is called the order of the files does not matter:
[...
How to find Unused Amazon EC2 Security groups
... Display Security Groups left to audit / delete
echo "select * from groups order by groupid" | mysql $DBCONFIG $DB | sed 's/groupid\t/groupid\t\t/'
And here is the sql to create the database.
-- MySQL dump 10.13 Distrib 5.5.41, for debian-linux-gnu (x86_64)
--
-- Host: localhost Database: aws...
Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...use), not by record number. Discussions are
increasingly infinite-scroll ordered by date (again allowing index
use), not by paginated by post number. And so on.
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Can I use a function for a default value in MySql?
...f their DB package, and it's not as feature rich as we'd like.
http://www.phpbuilder.com/board/showthread.php?t=10349169
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How to simplify a null-safe compareTo() implementation?
...gt; NULL_SAFE_COMPARATOR
= new NullComparator(String.CASE_INSENSITIVE_ORDER);
@Override
public int compareTo(Metadata other) {
int result = NULL_SAFE_COMPARATOR.compare(this.name, other.name);
if (result != 0) {
return result;
}
return NULL_SAFE_COMPARATOR.compare(this....
eval command in Bash and its typical uses
... as a text file, reads each line of text, and uses eval to execute them in order. That's essentially the same behavior as the bash source statement, which is what one would use, unless it was necessary to perform some kind of transformation (e.g. filtering or substitution) on the content of the impo...
Is C++ context-free or context-sensitive?
... the important part is that the parser needs to perform the computation in order to perform syntactic analysis. It could have been any computation expressible as a template instantiation and there is every reason to believe that C++ template instantiation is Turing-complete. See, for example, Todd L...
Operation on every pair of element in a list
...,1 3,2 3,3 3,4
4,1 4,2 4,3 4,4
permutations() generates all unique orderings of each unique pair of elements, eliminating the x,x duplicates:
. 1,2 1,3 1,4
2,1 . 2,3 2,4
3,1 3,2 . 3,4
4,1 4,2 4,3 .
Finally, combinations() only generates each unique pair of elements, in ...