Javascript switch statement using regular expressions

Question

I'm attempting an exercise and can't quite understand where I'm going wrong.

I have a form where my postcode field will only validate if it meets the requirements of the regex specific to the state chosen. I need to use a switch statement to determine what RegEx to use based on the state choice.

This is what I have so far:

function validPostCode() {
  var state = (document.getElementById("state").value);

  switch (state) {
    case "SA":
    var stateRegEx = /^5([0-9]{3})$/;
    break;
    case "NSW":
    var stateRegEx = /^2([0-9]{3})$/;
    break;
  }
  return stateRegEx.test(document.getElementById("postcode").value);
}

What's your question? Is the code breaking?

Andy
– Andy

2014-09-15 12:11:04 +00:00
Commented Sep 15, 2014 at 12:11 — Andy
– Andy, Commented Sep 15, 2014 at 12:11

AmanVirdi · Accepted Answer · 2014-09-15 12:10:42Z

1

Try this:

function validPostCode() {
  var state = (document.getElementById("state").value);
  var stateRegEx;            // added here

  switch (state) {
    case "SA":
    stateRegEx = /^5([0-9]{3})$/;    // var removed
    break;
    case "NSW":
    stateRegEx = /^2([0-9]{3})$/;    // var removed
    break;
  }
  return stateRegEx.test(document.getElementById("postcode").value);
}

answered Sep 15, 2014 at 12:10

AmanVirdi

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