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Why covariance and contravariance do not support value type
...inter) contiguously in memory; the objects being pointed to are separately allocated.
The other (related) issue(*) is that (almost) all Reference types have the same representation for variance purposes and much code does not need to know of the difference between types, so co- and contra-variance...
How to clear Facebook Sharer cache?
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like this
<tt>fbml.refreshRefUrl("http://www.mysite.com/someurl.php")
You can study the related stuff from here fb:ref. I hope it will work for you
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Catch all JavaScript errors and send them to server
...tested Sentry on production and it works fine (JS and other languages like PHP)
1- It's open source (You can install it on your own server)
2- You can use the free plan (100 reports / day)
Or install it on your server: github.com/getsentry
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Vertical (rotated) text in HTML table
...enn: Well, yes, VB.NET code depends on VB.NET but you can do the same with PHP or Phyton or Ruby or whater :) By the way, convert it to C# and you can let it run on mono for Linux or Mac or Solaris.
– Stefan Steiger
Sep 2 '13 at 13:56
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Regex lookahead, lookbehind and atomic groups
... doesn't support look-behind assertions. And most flavors that support it (PHP, Python etc) require that look-behind portion to have a fixed length.
Atomic groups basically discards/forgets the subsequent tokens in the group once a token matches. Check this page for examples of atomic groups
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Best way to add “current” class to nav in Rails 3
...d this thoroughly and I'm very new to RoR (moving over after a decade with PHP) so if this has a major flaw I'd love to hear it.
At least this way you only need 1 helper function and a simple call in each link.
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How to generate a create table script for an existing table in phpmyadmin?
How can I generate a create table script for an existing table in phpmyadmin?
10 Answers
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.gitignore is ignored by Git
...rly. I saved its contents in notepad, and did: git rm -r --cached someFile.php and it worked like a charm :)
– ShayLivyatan
Jul 20 '16 at 7:08
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How to validate a url in Python? (Malformed or not)
...t work for IPv6 urls, which have the form http://[2001:0DB8::3]:8080/index.php?valid=true#result
– cimnine
Feb 4 '18 at 20:42
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How do we control web page caching, across all browsers?
...he request, so you don't need to specify it at all.
How to set it?
Using PHP:
header("Cache-Control: no-cache, no-store, must-revalidate"); // HTTP 1.1.
header("Pragma: no-cache"); // HTTP 1.0.
header("Expires: 0"); // Proxies.
Using Java Servlet, or Node.js:
response.setHeader("Cache-Control"...