Dustin Diaz object string supplanter

gistfile1.txt

function substitute(s, o){
    return s.replace( /{([^{}]*)}/g ,
        function (a, b) {
            var r = o[b];
             return typeof r === 'string' || typeof r === 'number' ? r : a;
        }
    );
}
substitute("My name is {name} and I work at {workplace}",{
  name: "Justin Perry",
  workplace: "I || X"
})