lovecoding
/
W250913


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function s(s){
            var arr = ["0","1","2","3","4","5","6","7","8","9"];
            if(arr.includes(s)){
                return true
            }else{
                return false
            }
        }

        function CollectDigits(str){
            var arr = str.split("");
            var res = arr.filter(function(item){
                if(s(item)){
                    return true;
                }else{
                    return false;
                }
            })
            console.log(res);
        }

        CollectDigits("1abc23def4")
    </script>
</body>
</html>