Find first non-repeating character in a word

function findObjPropInArr(arr, prop, val) {
    for(var i = 0; i<arr.length; i++) {
        if(arr[i][prop] === val) {
            return i;
        }
    }
    return -1;
}

function findFirstNoRepeat(word) {
    var wordCount = [],
        arrIndex,
        i,
        r;
    
    for(i = 0; i<word.length; i++) {

        arrIndex = findObjPropInArr(wordCount, 'letter', word.charAt(i));

        if (arrIndex > -1) {
           wordCount[arrIndex].count++;
        } else {
            wordCount.push({
                letter: word.charAt(i),
                count: 1
            });
        }
        
    }
    
    console.log(wordCount);
    
    for(r = 0; r<wordCount.length; r++) {
        if(wordCount[r].count === 1) {
            console.log(wordCount[r].letter)
            return wordCount[r].letter
        }
    }
}

findFirstNoRepeat('teeter');
findFirstNoRepeat('total');