RosettaCodeData/Task/Y-combinator/JavaScript/y-combinator-3.js

18 lines
359 B
JavaScript

function pseudoY(f) {
return (function(h) {
return h(h);
})(function(h) {
return f.bind(function() {
return h(h).apply(null, arguments);
});
});
}
var fac = pseudoY(function(n) {
return n > 1 ? n * this(n - 1) : 1;
});
var fib = pseudoY(function(n) {
return n > 1 ? this(n - 1) + this(n - 2) : n;
});