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Examples of GoF Design Patterns in Java's core libraries

...FloatBuffer and DoubleBuffer) javax.swing.GroupLayout.Group#addComponent() All implementations of java.lang.Appendable java.util.stream.Stream.Builder Factory method (recognizeable by creational methods returning an implementation of an abstract/interface type) java.util.Calendar#getInstance() jav...
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Test whether a glob has any matches in bash

... If find feels like overkill and the number of files likely to match is small, use stat: if stat -t glob* >/dev/null 2>&1 then echo found else echo not found fi share | improve ...
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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 12 ...
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MySQL show status - active or total connections?

...W STATUS WHERE `variable_name` = 'Threads_connected'; This will show you all the open connections. share | improve this answer | follow | ...
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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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Routing for custom ASP.NET MVC 404 Error page

... 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...
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Trying to git pull with error: cannot open .git/FETCH_HEAD: Permission denied

...n give my www-data user the permission to update the .git directory. I am calling the shell script using php over http in browser. Details here – KillABug Aug 21 '15 at 8:58 15 ...