統(tǒng)計字符串中去除空格各個字符出現(xiàn)的個數(shù)
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()
打印結(jié)果
TIM截圖20170717175323.png
