Question

132

Javascript: Generic get next item in array

rated 0 times [ 139] [ 7] / answers: 1 / hits: 120292 / 11 Years ago, tue, april 30, 2013, 12:00:00

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.)

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hugo

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3 Years ago

answered 11 Years ago jennie · Accepted Answer

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]