camelcasing

I'm about to write a parser for a language that's supposed to have strict syntactic rules about naming of types, variables and such. For example all classes must be PascalCase, and all variables/parameter names and other identifiers must be camelCase. For example HTMLParser is not allowed and must be named HtmlParser . Any ideas for a regexp that can match something that is PascalCase, but does not have two capital letters in it? camelCase: ^[a-z]+(?:[A-Z][a-z]+)*$ PascalCase: ^[A-Z][a-z]+(?:[A-Z][a-z]+)*$ /([A-Z][a-z]+)*[A-Z][a-z]*/ But I have to say your naming choice stinks, HTMLParser

Is there an easy way in Bash to split a camelcased word into its constituent words? For example, I want to split aCertainCamelCasedWord into 'a Certain Camel Cased Word' and be able to select those fields that interest me. This is trivially done with cut(1) when the word separator is the underscore, but how can I do this when the word is camelcased? sed 's/\([A-Z]\)/ \1/g' Captures each capital letter and substitutes a leading space with the capture for the whole stream. $ echo "aCertainCamelCasedWord" | sed 's/\([A-Z]\)/ \1/g' a Certain Camel Cased Word gerardw This solution works if you need

I'm looking for the easiest way to convert a string from camelback format to Title Case format. How do I change 'playerName' into 'Player Name'? NSString *str = @"playerName"; NSMutableString *str2 = [NSMutableString string]; for (NSInteger i=0; i<str.length; i++){ NSString *ch = [str substringWithRange:NSMakeRange(i, 1)]; if ([ch rangeOfCharacterFromSet:[NSCharacterSet uppercaseLetterCharacterSet]].location != NSNotFound) { [str2 appendString:@" "]; } [str2 appendString:ch]; } NSLog(@"%@", str2.capitalizedString); Here's a simpler Swift version. I've chucked it into an extension extension

This has been bothering me for a while, and I can't arrive at a solution that feels right ... Given an OO language in which the usual naming convention for object properties is camelCased, and an example object like this: { id: 667, firstName: "Vladimir", lastName: "Horowitz", canPlayPiano: true } How should I model this structure in a PostgreSQL table? There are three main options: unquoted camelCase column names quoted camelCase column names unquoted (lowercase) names with underscores They each have their drawbacks: Unquoted identifiers automatically fold to lowercase. This means that you

PHP manual suggests to autoload classes like function __autoload($class_name){ require_once("some_dir/".$class_name.".php"); } and this approach works fine to load class FooClass saved in the file my_dir/FooClass.php like class FooClass{ //some implementation } Question How can I make it possible to use _autoload() function and access FooClass saved in the file my_dir/foo_class.php ? You could convert the class name like this... function __autoload($class_name){ $name = strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', $class_name)); require_once("some_dir/".$name.".php"); } This is