CpSc 217 - Structured and Dynamic Web Programming

The notes found on these pages all reference the textbook given above. Unless otherwise stated, the citation of the information on these web pages is that text.

This chapter is a partial Review from 130

Operators

• ++ -- - + * / %
• <, >, <=, >=, ==, !=, &&, ||
• See Table 4-1, Page 62
• Operator Precedence
• += , -=, *=, ...
• eval function
  eval ("3+2") // returns 5
• typeof operator
  See page 82.
  typeof undefined is "undefined"
  typeof null is "object"
  typeof any number or NaN is "number"
• delete Operator

  var o = {x:1, y:2};
  delete o.x; // delete property x. returns true
  delete o; //can't delete a declared variable. returns false
   

• comma Operator
  i=o, j=1, k=2;
  Let's try it