gistfile1.js

function f(x) {  }

c = 7;
while (c > 0) {
    r = Math.floor(Math.random() * 49);
    if (! f(r)) {
        console.log(r + 1);
        f = function(r, f, x) { return x == r || f(x) }.bind(null, r, f);
        c--;
    }
}






/*
        f = (function(r, f) {
            return function(x) { return x == r || f(x) }
        })(r, f);
*/