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parseFloat("NaN")
returns “NaN”, but
parseFloat("NaN") == "NaN"
returns false. Now, that’s probably a good thing that it does return false, but I don’t understand how this is so. Did the JavaScript creators just make this a special case? Because otherwise I can’t understand how this returns false.
When a JavaScript function returns
NaN, this is not a literal string but an object property in the global space. You cannot compare it to the string"NaN".See https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/NaN