Check if all the answer values in the array are the same: - Javascript Array

Javascript examples for Array:every

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Description

Check if all the answer values in the array are the same:

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<body>

<button onclick="myFunction()">Test</button>

<p id="demo"></p>

<script>
var survey = [//from   w  ww  .  j  a  va2 s .  c  o m
    { name: "A",   answer: "Yes"},
    { name: "B",   answer: "Yes"},
    { name: "C",   answer: "Yes"},
    { name: "D",   answer: "No"}
];

function isSameAnswer(el,index,arr) {
    // Do not test the first array element, as you have nothing to compare to
    if (index === 0){
        return true;
    }
    else {
        //do each array element value match the value of the previous array element
        return (el.answer === arr[index - 1].answer);
    }
}

function myFunction() {
    document.getElementById("demo").innerHTML = survey.every(isSameAnswer);
}
</script>

</body>
</html>

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