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KotlinでString.formatみたいなことする

Kotlin

Posted at 2015-07-23

Kotlinのエバンジェリストの@ngsw_taroくんに教えてもらったのでメモ

Intに拡張関数を追加すると出来る

fun main(args: Array<String>) {
    for (i in 0..10) {
	    println("${i.format(2)}")
    }
}

private fun Int.format(disits: Int) = java.lang.String.format("%0${disits}d", this)

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