Does a matter whether a value is primitive or boxed

Question

One can use typeof to determine whether a value is primitive or boxed.

Consider:

typeof \"foo\"; // \"string\"
typeof new String(\"foo\         


        

Answer 1

I use underscore.js methods to detect the type of the variable. Try to use: isEmpty, isElement, isArray, isArguments, isFunction, isString, isNumber, isBoolean, isDate, isRegExp isNaN, isNull, isUndefined

Described here: http://documentcloud.github.com/underscore/