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How to convert a string or integer to binary in Ruby?

... You would naturally use Integer#to_s(2), String#to_i(2) or "%b" in a real program, but, if you're interested in how the translation works, this method calculates the binary representation of a given integer using basic operators: def int_t...
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How to create a GUID/UUID using iOS

...tring = CFUUIDCreateString(NULL, theUUID); CFRelease(theUUID); return (__bridge NSString *)string; } EDIT: Jan, 29 2014: If you're targeting iOS 6 or later, you can now use the much simpler method: NSString *UUID = [[NSUUID UUID] UUIDString]; ...
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When and why JPA entities should implement Serializable interface?

... This usually happens if you mix HQL and native SQL queries. In HQL, Hibernate maps the types you pass in to whatever the DB understands. When you run native SQL, then you must do the mapping yourself. If you don't, then the default m...
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keytool error :java.io.IoException:Incorrect AVA format

...) in a field for Name, Organization or somewhere else. Of course if you really want some charachter can be escaped with \ sign share | improve this answer | follow ...
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Property getters and setters

...g to backup the computed property. Try this: class Point { private var _x: Int = 0 // _x -> backingX var x: Int { set { _x = 2 * newValue } get { return _x / 2 } } } Specifically, in the Swift REPL: 15> var pt = Point() pt: Point = { _x = 0 } 16> pt.x = 10...
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Delete local Git branches after deleting them on the remote repo

...t long, you might want to add an alias to your .zshrc or .bashrc. Mine is called gbpurge (for git branches purge): alias gbpurge='git branch --merged | grep -Ev "(\*|master|develop|staging)" | xargs -n 1 git branch -d' Then reload your .bashrc or .zshrc: . ~/.bashrc or . ~/.zshrc ...
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Unique fields that allow nulls in Django

...pty string by providing your own customized model form for Foo with a clean_bar method that turns the empty string into None: class FooForm(forms.ModelForm): class Meta: model = Foo def clean_bar(self): return self.cleaned_data['bar'] or None class FooAdmin(admin.ModelAdmin...
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UITableView is starting with an offset in iOS 7

...ed Aug 22 '13 at 19:05 Mick MacCallum 122k4040 gold badges273273 silver badges274274 bronze badges answered Aug 22 '13 at 19:02 ...
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Reloading the page gives wrong GET request with AngularJS HTML5 mode

... Server side Using this mode requires URL rewriting on server side, basically you have to rewrite all your links to entry point of your application (e.g. index.html) The reason for this is that when you first visit the page (/about), e.g. after a refresh, the browser has no way of knowing that t...
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How to restore to a different database in sql server?

...mpCopy with the contents of your.bak. Example (restores a backup of a db called 'creditline' to 'MyTempCopy'; RESTORE FILELISTONLY FROM DISK='e:\mssql\backup\creditline.bak' >LogicalName >-------------- >CreditLine >CreditLine_log RESTORE DATABASE MyTempCopy FROM DISK='e:\mssql\backu...