steveshogren

<?php
class Velocity {
  public function __construct (PayoffCalc $PayoffCalc)
  {
      $this->_PayoffCalc  = $PayoffCalc;
  }

  public function toFloat()
  {
      $paymentPerDay = $this->_PayoffCalc->getPaymentPerDay();

steveshogren

def doCalc ()
   return 1 + 2
end
def doAwesome (x) 
   return doCalc() + x
end 

#before substitution...
def test () 
   return doAwesome(3)

steveshogren

  ;; trace-forms "Trace all the forms in the given body. Returns any
  ;; underlying uncaught exceptions that may make the forms fail."
  (trace-forms
   (let [a (+ 1 1)
         b (* 2 2)
         c (* a b (/ 4 0))]
     c))
  ;; => ArithmeticException Divide by zero
  ;;      Form failed: (/ 4 0)
  ;;      Form failed: (* a b (/ 4 0))

steveshogren

  ;; example up from clouredocs.org:
  ;; http://clojuredocs.org/clojure_contrib/clojure.contrib.trace/deftrace
  (deftrace fib [n]
    (if (or (= n 0) (= n 1))
      1
      (+ (fib (- n 1)) (fib (- n 2)))))

  (fib 4)
  ;; => 5
  ;; 1> TRACE t2742: (fib 4)

steveshogren

if workday(today()) do
  x = 1 + 1
else
  x = doOtherHugeCalc()
end

steveshogren

def ifworkday(first, second)
  if workday(today()) do
    return first
  else
    return second
  end
end
x = ifworkday(1 + 1, doOtherHugeCalc())

#when the values are “shown”

steveshogren

#if it is a macro...
defmacro ifworkday(first, second)
  if workday(today()) do
    return first
  else
    return second
  end
end
ifworkday(1+1, doOtherHugeCalc())

steveshogren

‘(a b c d)
;;=> (a b c d)

steveshogren

(= ‘a ‘a)
;;=> true

steveshogren

(= a a)
;; => java.lang.Exception: Unable to resolve symbol: a in this context