You cannot do it unless the C API allows passing a user-provided callback parameter. If it does not, you can only use static functions. The reason is that closures are not “just” functions. As their name implies, closures “close over” variables from their lexical scope. Each closure has an associated piece of data which holds … Read more
Side effects are the easier concept. A “pure function” is a function that maps its input value(s) into an output value function plus(x, y) { return x + y; }. A “side effect” is any effect other than that return value. So, for instance: function plusWithSideEffects(x, y) { alert(‘This is a side effect’); return x … Read more
Found another solution with lexical-let (defun foo (n) (lexical-let ((n n)) #'(lambda() n))) (funcall (foo 10)) ;; => 10
Formally speaking return is defined as always returning from the nearest enclosing named method A return expression return e must occur inside the body of some enclosing named method or function. The innermost enclosing named method or function in a source program, f , must have an explicitly declared result type, and the type of … Read more
1) Can Method Handles be used for Function Types? Scala targets JDK 5 and 6 which don’t have method handles, so it hasn’t tried to deal with that issue yet. 2) Can we get rid of the explicit declaration of “throws” type parameters? Scala doesn’t have checked exceptions. 3) Disallow @Shared on old-style loop index … Read more
It’s not true that there are restrictions that prevent you from calling eval that would be missed by static-analysis: it’s just that such references to to eval run in the global scope. Note that this is a change in ES5 from ES3 where indirect and direct references to eval both ran in the local scope, … Read more
You could use if(it == myList.first()) { // First element } if(it == myList.last()) { // Last element }