<script>

        //every()

        var nums = [1,2,3,4,5];

        var result = nums.every(function eve(item,index,array){

            if (typeof(item) == "number"){

                return true;

        }

            } );

        console.log(result);//true，只有当该函数对每一项都返回true时，every()才会返回true

        //filter()

        var nums2 = ['1',2,3,'str'];

        var result2 = nums2.filter(function fil(item,index,array){

            if(typeof(item) == "string"){

                return true

            }

        });

        console.log(result2);//返回 [该函数会返回true的项] 组成的数组

        //forEach()

        var nums3 = [1,2,3,4,'qq','1'];

        var log = "";

        function fEach (item,index,array){

            log += 'index['+index+']:'+ item +' ';

        };

        nums3.forEach(fEach);

        console.log(log);

        // nums3.forEach(alert);

        // console.log(nums3);

        //map()

        var nums4 = [1,'q','1',true];

        var log2;

        var result4 = nums4.map(function map(item,index,array){

            log2 = 'index['+index+']:'+ item +' ';

            return log2;//map()会返回每次函数调用的结果，作为一个数组。

        })

        console.log(result4);

        //some()

        var nums5 = [1,2,3,4,true];

        var result5 = nums5.some(function some(item,index,array){

            if (typeof(item) == "boolean")

            return true//只要函数对任意一项返回true，整个方法就会返回true

        })

        console.log(result5);

    </script>