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How to get CRON to call in the correct PATHs
...to do this.
The systemwide cron file looks like this:
This has the username field, as used by /etc/crontab.
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file.
# This file also has a userna...
“unrecognized selector sent to instance” error in Objective-C
...
It looks like you're not memory managing the view controller properly and it is being deallocated at some point - which causes the numberButtonClicked: method to be sent to another object that is now occupying the memory that the view controller was ...
Bootstrap 3 Flush footer to bottom. not fixed
...r's height */
}
.footer, .push {
height: 155px; /* .push must be the same height as .footer */
}
HTML
<div class="wrapper">
<p>Your website content here.</p>
<div class="push"></div>
</div>
<div class="footer">
<p>Copyright (c) 2008</p&...
Remove non-utf8 characters from string
...10xxx 10xxxxxx * 3
){1,100} # ...one or more times
)
| . # anything else
/x
END;
preg_replace($regex, '$1', $text);
It searches for UTF-8 sequences, and captures those into group 1. It also matches single bytes that could not be identif...
VIM Replace word with contents of paste buffer?
I need to do a bunch of word replacements in a file and want to do it with a vi command, not an EX command such as :%s///g . I know that this is the typical way one replaces the word at the current cursor position: cw<text><esc> but is there a way to do this with the contents of the u...
Ruby on Rails vs ASP.NET MVC 3 for a .NET Guy? [closed]
...R and I want to select between APS.NET MVC3 and RoR. C# is sure easier for me as I have been doing it for so long but I am wondering if there is any point to consider using RoR over .MVC to develop a real world website?
...
Oracle SQL: Update a table with data from another table
...
This is called a correlated update
UPDATE table1 t1
SET (name, desc) = (SELECT t2.name, t2.desc
FROM table2 t2
WHERE t1.id = t2.id)
WHERE EXISTS (
SELECT 1
FROM table2 t2
WHERE t1.id = t2.id )
Assuming the join result...
clang error: unknown argument: '-mno-fused-madd' (python package installation failure)
...n tell clang to not raise this as an error by setting the following environment variables prior compilation:
export CFLAGS=-Qunused-arguments
export CPPFLAGS=-Qunused-arguments
Then pip install psycopg2should work.
I had the same when trying to pip install lxml.
Edit: if you are installing as s...
Recommended way to embed PDF in HTML?
What is the recommended way to embed PDF in HTML?
24 Answers
24
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What is the right way to check for a null string in Objective-C?
...dOfClass:[NSNull class]] is pointlessly complex since [NSNull null] is documented to be a singleton so you can just check for pointer equality. See Topics for Cocoa: Using Null.
So a good test might be:
if (title == (id)[NSNull null] || title.length == 0 ) title = @"Something";
Note how you can ...