将数组按指定个数分割,并以"|"做分割

function sliceArray(arr,num){
            let newArr=[]
            for (var i = 0; i < arr.length; i+=num) {
                if(arr.length>=(i+num)) {
                    newArr.push(arr.slice(i,i+num).join("|"))
                }else{
                    newArr.push(arr.slice(i).join("|"))
                }
            }
            return newArr;
        }

```js