How Do I Create A Class Instance From A String Name In Ruby
4 Answers Sorted by 255 In rails you can just do clazz ExampleClass constantize In pure ruby clazz Object const get ExampleClass with modules module Foo class Bar end end you would use clazz Foo Bar split inject Object o c o const get c Foo Bar clazz new
Ruby Convert Class Name In String To Actual Class, Use classify to convert a string which may even be plural i e perhaps it s a table reference to create a class name still a string then call constantize to try to find and return the class name constant note that in Ruby class names are constants
Metaprogramming Ruby String To Class Name Stack Overflow
7 Answers Sorted by 38 If you re using Rails it provides a method called constantize that will work irb main 017 0 Object const get House Owns NameError wrong constant name House Owns House Owns constantize House Owns Share
Class String RDoc Documentation Ruby Doc, You can convert certain objects to Strings with Method String Some String methods modify self Typically a method whose name ends with modifies self and returns self often a similarly named method without the returns a new string
Ruby Convert String To Class Example Coderwall
Ruby Convert String To Class Example Coderwall, If you have a string with the class name you can retrieve the class object to perform operations with it like so In Rails clazz YourClassName constantize In Ruby without Rails clazz Kernel const get YourClassName ruby
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How To Instantiate Class From Name String In Rails
How To Instantiate Class From Name String In Rails Ruby on Rails API Method name ClassName instance name constantize new It can be even not formatted we can user string method classify name my super class instance name classify constantize new Of course maybe this is not very Rails way but it solves it s purpose ruby on rails ruby on rails 3
Ruby Convert CSV File To Two Dimensional Array DEV Community
What can you do Convert it into a string with to s then convert it back to an integer with to i For example You can convert the Integer 1 to the String 1 Then you can use methods from the new class which helps you do something that wasn t possible before Remember that in Ruby How To Use Ruby Conversion Methods to s To a To str . Str hello str at 0 h str at 1 3 ell str at 2 l str at 2 1 lo str at 5 nil str at 5 1 If a Regexp is given the matching portion of the string is returned If a String is given that given string is returned if it occurs in the string For each of the relevant classes the conversion is done by calling a specific conversion method Array to ary Hash to hash Integer to int String to str Array Convertible Objects An Array convertible object is an object that Has instance method to ary The method accepts no arguments
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