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JavaScript Casing

The ES5 spec defined two methods for changing the case of a string, .toUpperCase() and .toLowerCase(). They work just like Ruby's upcase and downcase.

=> "TEST"
=> "test"

There are two similar methods called .toLocaleUpperCase() and .toLocaleLowerCase() which are intended to yield the correct result based on the host environment's locale. I have not seen these methods in the wild but I'm curious if they are used.

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