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Why `null >= 0 && null
I had to write a routine that increments the value of a variable by 1 if its type is number and assigns 0 to the variable if not, where the variable is initially null or undefined .
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Wait for a process to finish
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tail works under the hood by polling with kill(pid, SIG_0) to a process (discovered using strace).
– Att Righ
Nov 21 '17 at 1:47
2
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Threads vs Processes in Linux
...l. When the problem falls in a gray area the other trade offs as explained by ephemient becomes important.
– Saurabh
Feb 6 '12 at 7:05
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MySQL ON DUPLICATE KEY - last insert id?
...e page they explain how you can make LAST_INSERT_ID meaningful for updates by passing an expression to that MySQL function.
From the MySQL documentation example:
If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE inserts a row, the LAST_INSERT_ID() function returns the AUTO_INCR...
What's NSLocalizedString equivalent in Swift?
... That's a very good idea! I also made it a little bit smarter by changing to func localized(comment: String = "") -> String so it becomes smaller and with optional comments :)
– Gui Moura
Jul 1 '15 at 17:58
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How to prevent http file caching in Apache httpd (MAMP)
...header Cache-Control: private, x-gzip-ok="" > to prevent caching of ads by proxies and clients.
From http://www.askapache.com/htaccess/using-http-headers-with-htaccess.html
And optionally add the extension for the template files you are retrieving if you are using an extension other than .html f...
Bootstrap 3 collapsed menu doesn't close on click
...en when you click on a menu item. You can manually override this behaviour by calling .collapse('hide'); on the jQuery element that you want to collapse.
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Where are $_SESSION variables stored?
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The location of the $_SESSION variable storage is determined by PHP's session.save_path configuration. Usually this is /tmp on a Linux/Unix system. Use the phpinfo() function to view your particular settings if not 100% sure by creating a file with this content in the DocumentRoot of y...
Viewing my IIS hosted site on other machines on my network
...n)
Because outbound traffic(from server to outside world) is allowed by default .it means for example http responses that web server is sending back to outside users and requests
But inbound traffic (originating from outside world to the server) is blocked by default like the user web reques...
C++, Free-Store vs Heap
...The free store is one of the two
dynamic memory areas, allocated/freed
by new/delete. Object lifetime can be
less than the time the storage is
allocated; that is, free store objects
can have memory allocated without
being immediately initialized, and can
be destroyed without the memor...