javascript - 范围错误 : Maximum call stack size error in JS function

Question

  function findRandomDayIndex() {
    var dayindex = _.random(0, 39);
    var slot = dayslots[dayindex]; // array of 40 objects
    if(slot.filled === true || slot === undefined) {
      return findRandomDayIndex();
    } else {
      return dayindex;
    } 
  }

我得到错误:

RangeError: Maximum call stack size exceeded iteration of the same function

怎样才能更好的写函数？

Answer 1

你可以试试这个版本

function findRandomDayIndex()
{
   var dayindex = Math.random(0, 39);
   while( ( slot = dayslots[dayindex] ) == null )
       dayindex = Math.random(0, 39);
   return dayindex ;
}

请检查dayslot的一致性，以防止无限的while循环