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Rails DB Migration - How To Drop a Table?
...tp://api.rubyonrails.org/classes/ActiveRecord/Migration.html
More specifically, you can see how to drop a table using the following approach:
drop_table :table_name
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Automate ssh-keygen -t rsa so it does not ask for a passphrase
...ing prompted for a passphrase you can do the following:
$ ssh-keygen -f id_rsa -t rsa -N ''
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In Java, is there a way to write a string literal without having to escape quotes?
...ing literal with a lot of quotation marks inside it. You could escape them all, but it's a pain, and difficult to read.
8 A...
How to convert a string into double and vice versa?
... Double is a numeric data type - it does not contain any formatting. Calling [NSString doubleValue] would return 1000 because it's just a number.
– Andy
Oct 5 '08 at 12:53
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Add st, nd, rd and th (ordinal) suffix to a number
I would like to dynamically generate a string of text based on a current day. So, for example, if it is day 1 then I would like my code to generate = "Its the 1* st *".
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getting type T from IEnumerable
... Or even worse write a method with yield returns and try to call GetType on a variable created with this method. It will tell you that it is not event a generic type. So basically there is no universal way to get T given an instance variable of type IEnumerable<T>
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Having a UITextField in a UITableViewCell
...ntifier:kCellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:kCellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryNone;
if ([indexPath section] == 0) {
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Setting UIButton image results in blue button in iOS 7
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In iOS7 there is new button type called UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0), // standard system button
Check your .xib file and change button type to Custom
To do this programmatically, add this line to the viewDidLoad:
[UIButton buttonWithType...
Routing for custom ASP.NET MVC 404 Error page
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Just add catch all route at the end of the routes table and display whatever page you want with it.
See: How can i make a catch all route to handle '404 page not found' queries for ASP.NET MVC?
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Combine multiple Collections into a single logical Collection?
...llections (e.g. 3 ArrayLists) as members of a class. Now, I want to expose all the elements to other classes so they can simply iterate over all elements (ideally, read only).
I'm using guava collections and I wonder how I could use guava iterables/iterators to generate a logical view on the interna...