Checkio: Return the second index of a symbol in a given text.

second-index.js

/*
You are given two strings and you have to find an index of the second occurrence of the second string in the first one.

Let's go through the first example where you need to find the second occurrence of "s" in a word "sims". It’s easy to find its first occurrence with a function indexOf which will point out that "s" is the first symbol in a word "sims" and therefore the index of the first occurrence is 0. But we have to find the second "s" which is 4th in a row and that means that the index of the second occurrence (and the answer to a question) is 3.

Input: Two strings.

Output: Int or undefined
*/

function secondIndex(text, symbol) {
    // returns the second index of a symbol in a given text
    var count = 0;
    // your code here
    
    for (var i = 0; i < text.length; i++) {
      
        if (text[i] === symbol) {
            count++;
        }
        
        if (count === 2) {
            return i;
        }
    }   
    
}    


var assert = require('assert');

if (!global.is_checking) {
    console.log('Example')
    console.log(secondIndex("sims", "s"))

    // These "asserts" are used for self-checking and not for an auto-testing
    assert.equal(secondIndex("sims", "s"), 3)
    assert.equal(secondIndex("find the river", "e"), 12)
    assert.equal(secondIndex("hi", " "), undefined)
    assert.equal(secondIndex("hi mayor", " "), undefined)
    assert.equal(secondIndex("hi mr Mayor", " "), 5)
    console.log("You are awesome! All tests are done! Go Check it!");
}