Fill ArrayBuffer with pairs of Double

Question

I need some guidance here, please.

What I have:

import scala.collection.mutable.ArrayBuffer
var buffer = ArrayBuffer.empty[(Double, Double)]

and I want to fill the buffer with pairs. I'm trying this but it doesn't work:

for(someCycle){
    buffer += (someDouble, someOtherDouble)
}

the error:

 error: type mismatch;
 found   : Double
 required: (Double, Double)
              buffer += (someDouble, otherDouble)

I understand the error but I can't figure out the right syntax.

Answer 1

由于buffer.+=(someDouble, someOtherDouble) 是一个函数，编译器将其推断为：

+=

让它认为您正在尝试将两个参数传递给buffer += ((someDouble, someOtherDouble)) 而不是一个（错误消息有点误导）。

您需要一个额外的括号：

buffer += (someDouble -> someOtherDouble)

或者：

{{1}}