Common4k

Common extensions on different aspects of the language, basic types, strings, collections, files, control structures, exceptions, logging, et cetera.

Here are some highlights pointed out but you might want to visit the KDoc for a more complete overview of the provided functionality.

Misc

fun Long.timify(format: MsTimification): String
fun <IN, OUT> IN?.nullOrWith(wither: (IN) -> OUT): OUT?
fun Throwable.stackTraceAsString(): String
fun Array<StackTraceElement>.formatted(): List<String>

Numbers

fun Int.isBetweenInclusive(lower: Int, upper: Int): Boolean
fun Int.forEach(code: () -> Unit)
fun Double.format(digits: Int): String
fun Double.toSeconds(digits: Int = 3, suffix: String = " secs"): String

String

fun String.removePreAndSuffix(search: String)
fun String.containsAll(vararg substrings: String, ignoreCase: Boolean = false)
operator fun StringBuilder.plusAssign(char: Char)
fun String.saveToFile(target: File)

Collection

fun <K, V> MutableMap<K, V>.put(pair: Pair<K, V>): V?
fun <K, V> mapsOf(vararg maps: Map<K, V>): Map<K, V>
fun List<Any>.prettyPrint(prefix: String, joiner: String)
fun <K, V> Iterable<Pair<K, V>>.toMutableMap()

File

fun tempFile(name: String): File
fun File.verifyExists(): File
fun File.move(target: File)
fun File.touch()