第一种方法使用reduce方法，通过传入的内容来确定

var arrs=['a','a','d','c','f','d','我','我','他',2,2,5,4,6,8];
function a(){
    return  arrs.reduce( function(prev:any,next:any){
        console.log(prev);
        console.log(next);
        prev[next]=(prev[next]+1) || 1;

        return prev;
    },{})
}

console.log(a());  

var arr=['a','a','d','c','f','d','我','我','他',2,2,5,4,6,8];

function arrCheck(arr:any){
    var newArr = [];
    for(var i=0;i<arr.length;i++){
        var temp=arr[i];
        var count=0;
        for(var j=0;j<arr.length;j++){
            if(arr[j]==temp){
                count++;
                arr[j]=-1;
            }
        }
        if(temp != -1){
            newArr.push(temp+","+count)
        }
    }
    return newArr;
}
arrCheck(arrs);

var arr=['a','a','d','c','f','d','我','我','他',2,2,5,4,6,8];
var obj={};
 for(let i=0;i<arr.length;i++){
     if(obj.hasOwnProperty(arr[i])){
         obj[arr[i]] +=1;
     }else{
         obj[arr[i]] =1;
     }
 }
console.log(obj);