chuck
/
custom-tool-function


			
				
					
						
						
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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>
    <script src="./src/index.js"></script>
</head>
<body>
    <script>
        //map
        let arr = [1,2,3]
        let result = map(arr,function(item,index){
            return item * 10
        })
        console.log(result)

        //reduce
        let result1 = reduce(arr,function(res,item){
            return res + item
        },0)
        console.log(result1)

        //filter
        let result2 = filter(arr,function(item){
            return item%2 === 0
        })
        console.log(result2)

        //find
        let result3 = find(arr,function(item){
            return item > 7
        })
        console.log(result3)

        //findIndex
        let result4 = findIndex(arr,function(item){
            return item > 1
        })
        console.log(result4)

        //every
        let result5 = every(arr,function(item){
            return item > 2;
        })
        console.log(result5)

        //some
        let result6 = some(arr,function(item){
            return item > 8;
        })
        console.log(result6)

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