# encoding: utf-8
dw = $objectWrappers.wrap($iterables.mutableListOf())
data = $objectWrappers.wrap($arrays.arrayOf($plugins.loadClass("java.lang.String"), "one", nil, "three", "four", nil))
# 将非空字符串转换为其长度，并添加索引信息, 带索引的非空字符串长度: [0_3, 2_5, 3_4]
data.mapIndexedNotNullTo(dw) { |index, word|
  if word != nil then
    index.to_s + "_" + $objectWrappers.wrap(word).count().to_s
  else
    nil
  end
}.forEach { |it|
  $console.log(it)
}