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How can I check if a command exists in a shell script? [duplicate]
...oesnt exist?
– Andrew
Sep 23 '11 at 20:37
12
Andrew, try if ! type "foo" > /dev/null 2>&...
Rails 2.3-style plugins and deprecation warnings running task in Heroku
...
203
Are you using Heroku?
Heroku will inject plugins in Rails 3.x applications ..
To avoid...
How can you diff two pipelines in Bash?
...
BenMBenM
3,92611 gold badge2020 silver badges2626 bronze badges
1
...
System.Threading.Timer in C# it seems to be not working. It runs very fast every 3 second
...on.
– Ivan Zlatanov
Oct 9 '12 at 13:20
...
How do I compare two DateTime objects in PHP 5.2.8?
...
<?php
date_default_timezone_set('Europe/London');
$d1 = new DateTime('2008-08-03 14:52:10');
$d2 = new DateTime('2008-01-03 11:11:10');
var_dump($d1 == $d2);
var_dump($d1 > $d2);
var_dump($d1 < $d2);
?>
bool(false)
bool(true)
bool(false)
dev:~# php -v
PHP 5.2.6-1+lenny3 with Suhosin-Pa...
Bash history without line numbers
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207
Try this:
$ history | cut -c 8-
...
Add unique constraint to combination of two columns
...ng an exception (exceptions are expensive).
http://www.sqlperformance.com/2012/08/t-sql-queries/error-handling
http://www.mssqltips.com/sqlservertip/2632/checking-for-potential-constraint-violations-before-entering-sql-server-try-and-catch-logic/
If you want to prevent exceptions from bubbling up...
How do I invert BooleanToVisibilityConverter?
...parameter);
– JCH2k
Dec 1 '14 at 17:20
add a comment
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How to close this ssh tunnel? [closed]
...und' it says.
– Jacob
Feb 25 '12 at 20:43
It seems like it is. Mysql worked fine as well, but then Apache started to c...
Removing an activity from the history stack
...ected behavior with G+ login for example. See: stackoverflow.com/questions/20383878/… Took me a while to find this bug as my app kept crashing without any trace.
– Acapulco
Mar 16 '14 at 7:45
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