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Check if a table exists in Rails
...ke task that won't work unless a table exists. I'm working with more than 20 engineers on a website so I want to make sure they have migrated the table before they can do a rake task which will populate that respective table.
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How to add lines to end of file on Linux
...t"' >> /etc/sysconfig/configfile
echo 'VNCSERVERARGS[1]="-geometry 1600x1200"' >> /etc/sysconfig/configfile
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Guaranteed lifetime of temporary in C++?
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110
The destructor for that sort of temporaries is called at the end of the full-expression. That's ...
Adding rounded corner and drop shadow to UICollectionViewCell
...'s layer to achieve both results.
cell.contentView.layer.cornerRadius = 2.0f;
cell.contentView.layer.borderWidth = 1.0f;
cell.contentView.layer.borderColor = [UIColor clearColor].CGColor;
cell.contentView.layer.masksToBounds = YES;
cell.layer.shadowColor = [UIColor blackColor].CGColor;
cell.layer....
Create a tag in a GitHub repository
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1590
You can create tags for GitHub by either using:
the Git command line, or
GitHub's web interfac...
cancelling queued performSelector:afterDelay calls
...lector
[self performSelector:@selector(mySel:) withObject:nil afterDelay:5.0];
// cancel the above call (and any others on self)
[NSObject cancelPreviousPerformRequestsWithTarget:self];
See apple docs, it's right at the end of the performSelector:withObject:afterDelay: description.
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Get parts of a NSURL in objective-c
...assword@hostname)
the host name (here, digg.com)
the port (that would be :80 after the domain name for instance)
the path (here, /news/business/24hr)
the parameter string (anything that follows a semicolon)
the query string (that would be if you had GET parameters like ?foo=bar&baz=frob)
the fra...
Specifying Maven's local repository location as a CLI parameter
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260
use maven property maven.repo.local:
mvn -Dmaven.repo.local=$HOME/.my/other/repository clean in...
CoffeeScript, When to use fat arrow (=>) over arrow (->) and vice versa
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answered Jan 23 '12 at 0:18
nicolaskruchtennicolaskruchten
20k77 gold badges5858 silver badges8080 bronze badges
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How do I get the function name inside a function in PHP?
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totymedli
20.9k1818 gold badges102102 silver badges135135 bronze badges
answered Jun 17 '09 at 10:33
Silfverstro...