数组常用方法

findIndex(tempArray, value) {
               let len = tempArray.length;
               let index = 0;
               let result = [];
               while (index < len) {
                   index = tempArray.indexOf(value, index);
                   if (index === -1) {
                       break;
                   }
                   result.push(index);
                   index += 1;
               }
               return result;
           }