大约有 40,000 项符合查询结果（耗时：0.0600秒） [XML]
What's the fastest way to convert String to Number in JavaScript?
...oat(x);
+x;
By this quick test I made, it actually depends on browsers.
http://jsperf.com/best-of-string-to-number-conversion/2
Implicit marked the fastest on 3 browsers, but it makes the code hard to read… So choose whatever you feel like it!
...
Why does AuthorizeAttribute redirect to the login page for authentication and authorization failures
...Mvc.AuthorizeAttribute was doing the right thing -
older revisions of the HTTP specification used status code 401 for both "unauthorized" and "unauthenticated".
From the original specification:
If the request already included Authorization credentials, then the 401 response indicates that aut...
Highlight the difference between two strings in PHP
...but archive.org has a copy of the site: web.archive.org/web/20080506155528/http://software.zuavra.net/…
– R. Hill
Jan 25 '11 at 13:49
15
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Can you use a trailing comma in a JSON object?
...
No. The JSON spec, as maintained at http://json.org, does not allow trailing commas. From what I've seen, some parsers may silently allow them when reading a JSON string, while others will throw errors. For interoperability, you shouldn't include it.
The cod...
Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
...from (irb):17
>>
I also really encourage you to try ruby-debug:
http://railscasts.com/episodes/54-debugging-with-ruby-debug
http://www.sitepoint.com/article/debug-rails-app-ruby-debug/
http://www.datanoise.com/articles/2006/7/12/tutorial-on-ruby-debug
It's incredibly helpful!
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Using psql how do I list extensions installed in a database?
...
In psql that would be
\dx
See the manual for details: http://www.postgresql.org/docs/current/static/app-psql.html
Doing it in plain SQL it would be a select on pg_extension:
SELECT *
FROM pg_extension
http://www.postgresql.org/docs/current/static/catalog-pg-extension.html
...
How to specify Composer install path?
... "version": "4.0.2",
"dist": {
"url": "http://plugins.symfony-project.org/get/sfGuardPlugin/sfGuardPlugin-4.0.2.tgz",
"type": "tar"
}
}
}
],
"require": {
"sfGuardPlugin": "4.0.*"
}
}
Edi...
Copy / Put text on the clipboard with FireFox, Safari and Chrome
...* Replace this with your clipboard.swf location */
var clipboardSWF = 'http://appengine.bravo9.com/copy-into-clipboard/clipboard.swf';
if(!document.getElementById(flashId)) {
var div = document.createElement('div');
div.id = flashId;
document.body.appendChild(div);
...
How to get domain URL and application name?
...e web application name (actually the context path) is available by calling HttpServletrequest#getContextPath() (and thus NOT getServletPath() as one suggested before). You can retrieve this in JSP by ${pageContext.request.contextPath}.
<p>The context path is: ${pageContext.request.contextPat...
callback to handle completion of pipe
...
Based nodejs document, http://nodejs.org/api/stream.html#stream_event_finish,
it should handle writableStream's finish event.
var writable = getWriteable();
var readable = getReadable();
readable.pipe(writable);
writable.on('finish', function(){ ....