add operations for searching for substrings within the string
add operations for searching for substrings within the string
lucaswerkmeister/ceylon.language,jvasileff/ceylon.language,unratito/ceylon.language,jvasileff/ceylon.language,ceylon/ceylon.language,ceylon/ceylon.language,unratito/ceylon.language,lucaswerkmeister/ceylon.language