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  • Converting a string between camel case & snake case in Rails

    @taranjeet.singh
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    There is a method provided in rails to convert a string to the camel case.
    The method is camelize.


    By default camelize converts a string to upper camel case. If we don't specify any argument in camelize method, it will convert the given string to upper camel case.

    ex:-

    1. 2.1.5 :003 > a = "hello_world".camelize
    2.  => "HelloWorld"

    If we want to print the string in lower CamelCase(i.e first character in lower case and first character of other Consecutive words in upper case) then we can pass a lower parameter to the camelize method.

    ex:-

    1.  2.1.5 :002 > "hello_world".camelize(:lower)
    2.  => "helloWorld"

    If a string is to be converted to the snake case we can use the underscore method provided by Rails. The underscore method converts a string to snake case(i.e words seperated with _) 

    1. 2.1.5 :010 > "HelloWorldTest".underscore
    2.  => "hello_world_test"
    camelize underscore camel case in rails string snake case in rails string
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