Javascript: Generic get next item in array

Question

I am trying to make a JavaScript function that will search an array of strings for a value and return the next string. For example, if an array is built such that an item is followed by its stock code, I want to search for the item and have the stock code written.

var item = (from user input); //some code to get the initial item from user function findcode(code){   var arr = ["ball", "1f7g", "spoon", "2c8d", "pen", "9c3c"]; //making the array   for (var i=0; i<arr.lenth; i++){  //for loop to look through array     arr.indexOf(item);  //search array for whatever the user input was     var code = arr(i+1); //make the variable 'code' whatever comes next     break;   } } document.write(code); //write the code, I.e., whatever comes after the item 

(I'm sure it's obvious I'm new to JavaScript, and while this is similar to a number of other questions I found, those seemed to have more involved arrays or more complex searches. I can't seem to simplify them for my needs.)

Answer 1

You've almost got it right, but the syntax is arr[x], not arr(x):

index = array.indexOf(value); if(index >= 0 && index < array.length - 1)    nextItem = array[index + 1] 

BTW, using an object instead of an array might be a better option:

data = {"ball":"1f7g", "spoon":"2c8d", "pen":"9c3c"} 

and then simply

code = data[name]