获取数组中最大值和最小值

var min = max= null;

var obj = {};

for(var i=0;i<ary.length;i++){

var cur = ary[i];

obj[cur]= cur;

}
var count = 0 ;

for(var key in obj){

count++;

if(count===1){

min = key;

}

max = key;

}

console.log(min,max)

ary.sort(function(a,b){
return a-b;
});
var max = ary[ary.length-1];
var min = ary[0];

var min = max = ary[0];
for(var i=0;i<ary.length;i++){
var cur = ary[i];
cur>max? max=cur:null;
cur<min? min = cur:null;
}

 var max = Math.max.apply(null, ary);
  var min = Math.min.apply(null, ary);
    console.log(max, min)