Scala的ArrayBuffer

1. ArrayBuffer添加單數值 如：

ArrayBuffer(String)

var feature_val = ArrayBuffer[(String)]()
feature_val+="3"
           

2.ArrayBuffer添加多數值 如：

ArrayBuffer(String, String)

var feature_val = ArrayBuffer[(String, String)]()
var a = ("3","9")
feature_val.append(a)
// feature_val.append(("1","3"))
           

參考：

scala的ArrayBuffer API:

https://www.scala-lang.org/api/2.8.2/scala/collection/mutable/ArrayBuffer.html