统计字符串中去除空格各个字符出现的个数
val text = "This is A Text!"
Observable.from(text.toCharArray().asIterable())
.filter { !it.isWhitespace() }
.groupBy { it }
.map {
o ->
o.count().subscribe {
println("${o.key}:${it}")
}
}
.subscribe()
打印结果
TIM截图20170717175323.png
