Convert dash-separated string to camelCase?

Question

For example suppose I always have a string that is delimited by \"-\". Is there a way to transform

it-is-a-great-day-today

to

itIsAGreatDayToday

Answer 1

This works great but someone might be able to clean it up.

var toCamelCase = function(str) {
        // Replace special characters with a space
        str = str.replace(/[^a-zA-Z0-9 ]/g, " ");
        // put a space before an uppercase letter
        str = str.replace(/([a-z](?=[A-Z]))/g, '$1 ');
        // Lower case first character and some other stuff that I don't understand
        str = str.replace(/([^a-zA-Z0-9 ])|^[0-9]+/g, '').trim().toLowerCase();
        // uppercase characters preceded by a space or number
        str = str.replace(/([ 0-9]+)([a-zA-Z])/g, function(a,b,c) {
            return b.trim() + c.toUpperCase();
        });
        return str;
};

console.log(toCamelCase('hyphen~name~ format'));
console.log(toCamelCase('hyphen.name.format'));
console.log(toCamelCase('hyphen-name-format'));
console.log(toCamelCase('Hyphen-Dame-Gormat'));
console.log(toCamelCase('EquipmentClass name'));
console.log(toCamelCase('Equipment className'));
console.log(toCamelCase('equipment class name'));
console.log(toCamelCase(' e    Equipment Class Name'));
console.log(toCamelCase('under9score_name_format'));
console.log(toCamelCase('Enderscore_name_format'));
console.log(toCamelCase('EnderscoreBameFormat'));
console.log(toCamelCase('_EnderscoreBameFormat'));

http://jsbin.com/yageqi/1/edit?js,console