itarticle string method 2. String.prototype.concat(index) 3. String.prototype.split(string | regular Expression, number) 4. String.prototype.substring(start, end) 5. String.prototype.toLowerCase() 6. String.prototype.toUpperCase() 0
itarticle ruby筆記 介紹Method, Regular expression, Block, Convention 介紹Class, Inheritance, Module, Mixin 0