网易内推笔试

参加了网易内推的笔试，分享一下自己对三道编程题的理解。(ps:第二题有点投机取巧了)
题目顺序为：彩色砖块，交错的01串，小易独立的生活

var line = 'ABAB'
 var tokens = line.split('')
 var a = {};
 var num = 0;
 for(var i = 0;i<tokens.length;i++){
   if(!a[tokens[i]]){
     a[tokens[i]] = 1;
     num +=1;
   }
 }
 if(num ==2){
   console.log(2);
 }
 else if(num ==1){
   console.log(1); 
 }
 else{
   console.log(0);
 }

..........................................................................................

var arr = [1,1,1,1,0,1,1,1,1];
var arr3 = [];
 var arr2 = [];
 var arr1 = [];
// var max = Number(arr[0]);
 for (var i = 0; i < arr.length; i++) {
   if (Number(arr[i]) == Number(arr[i+1])) {
       arr1.push(arr[i]);
     arr2.push(arr1);
     arr1 = [];
   }
   else{
     arr1.push(arr[i]);
   }
 }
 for(var i =0;i<arr2.length;i++){
     arr3[i] = arr2[i].length;
 }
 arr3.sort(function(a,b){
   return b-a;
 });
 console.log(arr3[0]);

................................................................................

var arr = [16,5,100,10];
var day = 0;
for(var i = 1;i<=arr[1];i++){
     arr[2] = arr[2] - arr[0];
  if(arr[2]<0){
         //console.log(day)
  }else{
      day++
  }
}
while(arr[2]>=0){
    arr[2] = arr[2] -arr[3] -arr[0];
    if(arr[2]>=0){
        day++
    }
}
console.log(day);