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  1. var Maybe = function(x) {
  2.     return {
  3.         bind: function(f) {
  4.             return (x === null) ? null : f(x);
  5.         }
  6.     };
  7. };
  8.  
  9. var findSomething = function() { return Maybe(3); };
  10. var someFailure = function() { return Maybe(null); };
  11. var findSomethingElse = function(x) { return Maybe(x+5); };
  12. var lookup = function(x,y) { return Maybe(x*y); };
  13.  
  14. findSomething().bind(function(x) {
  15.     return findSomethingElse(x).bind(function(y) {
  16.         return someFailure().bind(function() {
  17.             return lookup(x,y).bind(function(z) {
  18.                 print('To sie nie wykona');
  19.             });
  20.         });
  21.     });
  22. });
  23.  
  24. findSomething().bind(function(x) {
  25.     return findSomethingElse(x).bind(function(y) {
  26.         return lookup(x,y).bind(function(z) {
  27.             print('val = ' + z);
  28.         });
  29.     });
  30. });
  31.  
Success #stdin #stdout 0.01s 4984KB
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val = 24
https://ideone.com/cuUVuj
language:
JavaScript (SMonkey 60.2.3)
created:
10 years ago
visibility:
secret

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