Question

/** Supplant **/
String.prototype.supplant = function(o) {
    return this.replace (/{([^{}]*)}/g,
        function (a, b) {
            var r = o[b];
            return typeof r === 'string' || typeof r === 'number' ? r : a;
        }
    );
};

Crockford is no doubt a JavaScript Grand Wizard, but his prototype is lacking when it comes to multiple level objects.

I would like this function to cover multiple level object replacement such as ‘{post.detailed}’ could anyone help me with a revised version of supplant?

Answer 1

That shouldn’t be too difficult. Use this replace function instead:

function (a, b) {
    var r = o,
        parts = b.split(".");
    for (var i=0; r && i<parts.length; i++)
        r = r[parts[i]];
    return typeof r === 'string' || typeof r === 'number' ? r : a;
}