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Beyond JavaScript

Beyond JavaScript

Given at JSConfEU 2011

Jakob Mattsson

October 01, 2011
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  1. list.select { |x| x > 0 } filter (> 0)

    list list.filter(function(x) { return x > 0 })
  2. && = lazyfunction(a, b) { if (execute(a)) { if (execute(b))

    { return true; } } return false; }; Call by name
  3. v = a + b unless x > y =>

    (x > y).unless(v = a + b) Operators on steroids
  4. filter = lazyfunction(msg) { var r = []; this.forEach(function(e) {

    if (e.send(msg)) { r.push(e); } }); return r; } Syntax unification