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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...values (no duplicates) in array a and not in b,
// listed in the same order as in array a.
var hash = getHash(b);
var diff = [];
for (var i=0; i<a.length; i++){
var value = a[i];
if ( !hash[value]){
diff.push(value);
}
}
return diff;
}
...
SVN how to resolve new tree conflicts when file is added on two branches
...to remove that file from the source branch B1, merge back from B2 to B1 in order to make that file visible on B1 (you will then work on the same element).
If a merge back is not possible because merges only occurs from B1 to B2, then a manual merge will be necessary for each B1->B2 merges.
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What is the best AJAX library for Django? [closed]
...ice? - In a word, No. I created this project 4 years ago as a cool tool in order to solve one specific problem I had at that time
– user
Mar 19 '14 at 19:09
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How to implement the activity stream in a social network
...be "comment" and "created" respectively), data contains additional data in order to avoid joins (for example, it can contain the subject name and surname, the article title and url, the comment body etc.).
Each Activity belongs to one or more ActivityFeeds, and they are related by a table that look...
403 Forbidden vs 401 Unauthorized HTTP responses
... (or 3xx: redirection)
Checks are usually done in this order:
404 if resource is public and does not exist or 3xx redirection
OTHERWISE:
401 if not logged-in or session expired
403 if user does not have permission to access resource (file, json, ...)
404 if resource does not ex...
How would you make two s overlap?
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Using CSS, you set the logo div to position absolute, and set the z-order to be above the second div.
#logo
{
position: absolute:
z-index: 2000;
left: 100px;
width: 100px;
height: 50px;
}
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Restore a postgres backup file using the command line?
...allow
pg_restore to be selective about what
is restored, or even to reorder the
items prior to being restored. The
archive file formats are designed to
be portable across architectures.
So depends on the way it was dumped out. You can probably figure it out using the excellent file(1...
How can I change CSS display none or block property using jQuery?
...
An explanation would be in order.
– Peter Mortensen
May 6 at 13:57
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Is there a version control system for database structure changes?
...cut&paste to extract relevant sections. A bit more housekeeping is in order, i.e., remove ':' from $Revision 1.1 $ to freeze them.
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How do I force detach Screen from another SSH session?
...he entry will disappear.
Press ENTER to quit the listing.
Optionally: in order to make the content fit your screen, reflow: PREFIX F (uppercase F)
Excerpt from man page of screen:
displays
Shows a tabular listing of all currently connected user front-ends (displays). This is most useful...