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jdk7Main.common.Base62.kt Maven / Gradle / Ivy
package io.fluidsonic.stdlib
import java.security.*
object Base62 {
private val characters = charArrayOf('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z')
private val random = SecureRandom()
fun random(length: Int): String {
check(length >= 0) { "'length' must not be negative" }
if (length == 0)
return ""
return buildString {
repeat(length) {
append(randomCharacter())
}
}
}
fun randomCharacter() =
characters[random.nextInt(characters.size)]
}
