JavaScript

// Taken from:
// http://philikon.wordpress.com/2010/04/20/associative-arrays-in-javascript/

function dict () {
    var keys = [];
    var values = [];

    return {
        get: function (key) {
            return values[keys.indexOf(key)]
        },

        set: function (key, value) {
            var i = keys.indexOf(key);
            if (i === -1) {
                i = keys.length;
            }
            keys[i] = key;
            values[i] = value;
        },

        del: function (key) {
            var i = keys.indexOf(key);
            keys.splice(i, 1);
            values.splice(i, 1);
        },

        keys: function () {
            return keys.slice();
        },

        values: function () {
            return values.slice();
        },
    };
}