javascript-with-sai/iterators.html at master · junaid537/javascript-with-sai · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //1
        let arr=[2,4,6,8,10];
        let newarr= arr.map(num=>num*num);
        document.write(newarr + '<br>');


        //2
        let arr1= [1, "two", 3, "four", 5, "Six", 7, "Eight", 9, "Ten"];

        function filter_list(l) {
            return l.filter(function(x){ return typeof x === "number" });
        }

        document.write(filter_list(arr1)+'<br>');

        //3
        arr2=[1, 3, 5, 7, 9]
        let sum=arr2.reduce((accumulator,currentValue)=>accumulator+currentValue);
        document.write(sum);

            /*syntax of reduce

            reduce(callback function with 2 paramenters , initial value of accumulator)
            reduce((accumulator,currentvalue)=>{return accumulator+currentvalue},0);
            */


    </script>
</body>
</html>