Search Array in JavaScript

Question

I need to sort through a data set which as you can see I\'ve assigned to the records variable. From that data I need to see if the zip code exists. If the zip code does not exis

Answer 1

Well, you didn't exactly ask a question, but I'll answer anyway :) The answer is that you should not use a normal array for this, but rather a map or associative array. Fortunately a plain Javascript object can be used for this:

var numbers = {};

// Variables
var records;
var numbers;
var index;
var output;
var outputMessageOne;
var outputMessageTwo;
var count = 0;

output = document.getElementById('outputDiv');
records = openZipCodeStudyRecordSet();

output.innerHTML = "The unique zip codes are: ";

while (records.readNextRecord()) {

    var zipCode = records.getSampleZipCode();
    numbers[zipCode] = 1; // just picking an arbitrary value
}

for (var zipCode: numbers) {
  output.innerHTML += zip + " ";
}

The reason is that this way you don't need to loop through the existing data for each new input.

Answer 2

You can simplify your for loop like so:

 matchedZip = false;

 for(i in numbersArray) {
    if (numbersArray[i] === zipCode) {
       matchedZip = true;
    }
 }

 if ( ! matchedZip) {
    numbersArray.push(zipCode);
 }

Try plugging that into your while loop. If you have the array push inside of the for loop you're going to end up pushing each zip code in every time there is not a match.