for-loop - kotlin，如何动态改变 for 循环速度

Question

有时基于某些条件，它可能想要在 for 循环内跳转（或向前移动）几步，

怎么办是科林？

一个简化的用例：

val datArray  = arrayOf(1, 2, 3......)

/**
 * start from the index to process some data, return how many data has been 
   consumed
*/
fun processData_1(startIndex: Int) : Int  {
   // process dataArray starting from the index of startIndex
   // return the data it has processed
}
fun processData_2(startIndex: Int) : Int  {
   // process dataArray starting from the index of startIndex
   // return the data it has processed
}

在 Java 中可能是：

for (int i=0; i<datArray.lenght-1; i++) {
   int processed = processData_1(i);
   i += processed; // jump a few steps for those have been processed, then start 2nd process
   if (i<datArray.lenght-1) { 
       processed = processData_2(i);
       i += processed;
   }
}

如何在科特林中做到这一点？

for(i in array.indices){
  val processed = processData(i);
  // todo
}

标签： for-loopkotlin

Answer 1

与while：

var i = 0

while (i < datArray.length - 1) {
    var processed = processData_1(i)
    i += processed // jump a few steps for those have been processed, then start 2nd process
    if (i < datArray.length - 1) {
        processed = processData_2(i)
        i += processed
    }
    i++
}