/
KotlinTip11.kt
60 lines (54 loc) · 1.28 KB
/
KotlinTip11.kt
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package com.sw.kotlin.tip11
/*
*打印字母表函数,在函数内result变量在好几处有使用到
* */
fun alphabet(): String {
val result = StringBuilder()
result.append("START\n")
for (letter in 'A'..'Z') {
result.append(letter)
}
result.append("\nEND")
return result.toString()
}
/*
* 通过with语句,将result作为参数传人,在内部就可以通过this来表示result变量了
* */
fun alphabet2(): String {
val result = StringBuilder()
return with(result) {
this.append("START\n")
for (letter in 'A'..'Z') {
this.append(letter)
}
this.append("\nEND")
this.toString()
}
}
/*
* 通过with语句,将result参数作为参数,在内部this也可以省略掉
* */
fun alphabet3(): String {
val result = StringBuilder()
return with(result) {
append("START\n")
for (letter in 'A'..'Z') {
append(letter)
}
append("\nEND")
toString()
}
}
/*
* 通过with语句,可以直接将对象传人,省掉对象的声明
* */
fun alphabet4(): String {
return with(StringBuilder()) {
append("START\n")
for (letter in 'A'..'Z') {
append(letter)
}
append("\nEND")
toString()
}
}