Kotlin 扩展函数之扩展属性

Kotlin统计元音字母出现的个数

val String.numVowels
    get() = count { "aeiouy".contains(it) }


fun <T> T.easyPrint(): T {
    println(this)
    return this
}

fun main() {
    "The people‘s Republic of China".numVowels.easyPrint()
}