大约有 40,000 项符合查询结果（耗时：0.0401秒） [XML]
Get distance between two points in canvas
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http://en.wikipedia.org/wiki/Euclidean_distance
If you have the coordinates, use the formula to calculate the distance:
var dist = Math.sqrt( Math.pow((x1-x2), 2) + Math.pow((y1-y2), 2) );
If your platform supports the **...
MySQL DROP all tables, ignoring foreign keys
...TABLE `VIEW_NAME` statement to DROP VIEW `VIEW_NAME` manually.
Note, per http://dev.mysql.com/doc/refman/5.5/en/drop-table.html, dropping with cascade is pointless / misleading:
"RESTRICT and CASCADE are permitted to make porting easier. In MySQL 5.5, they do nothing."
Therefore, in order f...
Jump to matching XML tags in Vim
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There is a vim plugin called matchit.vim . You can find it here: http://www.vim.org/scripts/script.php?script_id=39 . It was created pretty much the exact purpose you describe.
Install that, place your cursor on the body of the tag (not the <>, else it'll match those) and press % to...
Using Version Control for Home Development?
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Completely.
Credits also to http://blogs.embarcadero.com/nickhodges/2010/04/23/39416:
Sometimes we do stupid mistakes. Having a source control safety net is a must.
Tag important milestones. Even in home development you may want to mark a set of files...
send mail from linux terminal in one line [closed]
... SMTP server that you can send email from.
For gmail, for example, follow
http://rtcamp.com/tutorials/linux/ubuntu-postfix-gmail-smtp/
or any other similar tutorial.
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Do HttpClient and HttpClientHandler have to be disposed between requests?
System.Net.Http.HttpClient and System.Net.Http.HttpClientHandler in .NET Framework 4.5 implement IDisposable (via System.Net.Http.HttpMessageInvoker ).
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What's the difference between ISO 8601 and RFC 3339 Date Formats?
...etter just reading the document for yourself in the event you're worried:
http://tools.ietf.org/html/rfc3339
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Check if event is triggered by a human
...k e.originalEvent: if it's defined the click is human:
Look at the fiddle http://jsfiddle.net/Uf8Wv/
$('.checkbox').change(function(e){
if (e.originalEvent !== undefined)
{
alert ('human');
}
});
my example in the fiddle:
<input type='checkbox' id='try' >try
<button id='click...
What algorithms compute directions from point A to point B on a map?
...e world's fastest routing algorithms compared and proven for correctness:
http://algo2.iti.uka.de/schultes/hwy/schultes_diss.pdf
Here's a google tech talk on the subject:
http://www.youtube.com/watch?v=-0ErpE8tQbw
Here's a implementation of the highway-hierarchies algorithm as discussed by schul...
Create RegExps on the fly using string variables
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Yes you can.
https://developer.mozilla.org/en/JavaScript/Guide/Regular_Expressions
function replace_foo(target, string_to_replace, replacement) {
var regex = new RegExp("^" + string_to_replace);
return target.replace(regex, replace...