js-algorithms/algorithm21.html at master · klink/js-algorithms · GitHub

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<!DOCTYPE html>
<html>
<body>


<script>
    //https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris
    //

    const earthRadius = 6367.4447;
    const GM = 398600.4418;


function calculatePeriod(alt) {
    var orbitRadius = alt + earthRadius;
    return Math.round(2*Math.PI*Math.sqrt(Math.pow(orbitRadius,3)/GM));

}


function transform (obj) {
    var alt = obj.avgAlt;
    delete obj.avgAlt;
    obj.orbitalPeriod = calculatePeriod(alt);
    return obj;
}

    function orbitalPeriod(arr) {
  return arr.map(transform);
}

//tests
console.log(orbitalPeriod([{name : "sputnik", avgAlt : 35873.5553}]));
console.log(orbitalPeriod([{name: "iss", avgAlt: 413.6}, {name: "hubble", avgAlt: 556.7}, {name: "moon", avgAlt: 378632.553}]));

</script>


</body>
</html>