2015年1月30日 D6 让题目继续吧！

[think2011]

做了20年前端开发，你终于领悟赚钱不能靠打工，于是你辞职回家开了间小饭店。

你的日常是这样的，平时客人不多，就安排3个人一张桌子。

var guests = [1, 2, 3, 4, 5, 6, 7, 8, 9];
console.log(repast(guests, 3)); // 结果：[[1,2,3], [4,5,6], [7,8,9]];

忙碌时，就安排5个人一张桌子。

var guests = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
console.log(repast(guests, 5)); // 结果：[[1,2,3,4,5], [6,7,8,9,10], [11,12]];

作为前资深前端开发，这点问题根本难不住你：

function repast (guests, seatNum) {
// 请给客人合理的分配座位
}

[xinglie]

function repast (guests, seatNum) {
 var a=[];
 while(guests.length){a.push(guests.splice(0,seatNum));}
 return a;
}

[think2011]

@xinglie 好快，通过。

[Edward1992]

function repast(guests, seatNum){
 var result = [];

 var fullSeats = Math.floor(guests.length / seatNum);
 var remainGuests = guests.length % seatNum;

 function repastHelper(seatIndex){
 if(seatIndex == fullSeats){
 if(remainGuests > 0){
 result.push(guests.slice(seatIndex*seatNum));
 }
 }
 else{
 result.push(guests.slice(seatIndex*seatNum, (seatIndex + 1)* seatNum));
 repastHelper(seatIndex + 1);
 }
 }

 repastHelper(0);
 return result;
}

function test(){
 var guests;

 guests = [1, 2, 3, 4, 5, 6, 7, 8, 9];
 console.log(repast(guests, 3));

 guests = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
 console.log(repast(guests, 5));

 guests = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17];
 console.log(repast(guests, 4));
}

test();

[VaJoy]

如果想保留guests数组不被修改的话，可以这样

function repast (guests, seatNum) {
 for(var i=0,l=guests.length/seatNum|0,a=[],temp;i<l+1;){
 if((temp = guests.slice(seatNum*i,seatNum*(++i))).length)
 a.push(temp)
 }
 return a;
}

[jsers]

function repast(guests,num){
 var a = [];
 for(var i=0;i<Math.ceil(guests.length/num)*num;i=i+num){
 a.push(guests.slice(i,i+num))
 }
 return a
}

[soulcm]

function repast(guests, seatNum) {
 var res = [];
 for (var i = 0; i < guests.length; i = i + seatNum) {
 res.push(guests.slice(i, i + seatNum));
 }
 return res;
}

[XadillaX]

好久没来了，最近忙成翔。

function repast (guests, seatNum) {
 return guests.reduce(function(res, cur) {
 return ((!res.length || res[res.length - 1].length >= seatNum) ?
 (res.push([]), res[res.length - 1].push(cur)) :
 res[res.length - 1].push(cur)),
 res;
 }, []);
}

[Xinuy-Leung]

function repast (guests, seatNum) {
 var arr=[];
 for(var i=0;i<guests.length;i+=seatNum){
 arr.push(guests.slice(i,i+seatNum));
 }
 return arr;
}