» CS 330 Lecture 20 – Static vs. Dynamic

CS 330 Lecture 20 – Static vs. Dynamic

March 16, 2015 by Chris Johnson. Filed under cs330, lectures, spring 2015.

Agenda

what ?s
static vs. dynamic
polymorphism in C
enums in C
enums in Java

TODO

Exam on Wednesday. Roughly, we’ve talked about the shell, regex, grammars, modeling programs with abstract syntax trees, assembly, and types.
On Friday, we’ll be discussing JNI, which will be used in the next homework.

Code

charAt.html

<!DOCTYPE html>
<html>
<head>
  <title>...</title>

  <script>

function at(stuff, index) {
  if (typeof stuff == 'string') {
    return stuff.charAt(index);
  } else if (typeof stuff == 'number') {
    var shifted = stuff / Math.pow(10, index);
    return Math.floor(shifted % 10);
  }
}

  </script>
</head>
<body>

<script>

document.write(at("la madrugada", 3));
document.write('<br/>');
document.write(at(1213, 3));

</script>
  
</body>
</html>

Haiku

on dynamic typing
Meals with him are slow
Before each bite, he must check
“You’re still an apple?”