Data commit

Task/Tokenize-a-string-with-escaping/Kotlin/tokenize-a-string-with-escaping.kotlin

@@ -0,0 +1,21 @@
+// version 1.1.3
+
+const val SPE = "\ufffe"  // unused unicode char in Specials block
+const val SPF = "\uffff"  // ditto
+
+fun tokenize(str: String, sep: Char, esc: Char): List<String> {
+    var s = str.replace("$esc$esc", SPE).replace("$esc$sep", SPF)
+    s = if (s.last() == esc) // i.e. 'esc' not escaping anything
+        s.dropLast(1).replace("$esc", "") + esc
+    else
+        s.replace("$esc", "")
+    return s.split(sep).map { it.replace(SPE, "$esc").replace(SPF, "$sep") }
+}
+
+fun main(args: Array<String>) {
+    var str = "one^|uno||three^^^^|four^^^|^cuatro|"
+    val sep = '|'
+    val esc = '^'
+    val items = tokenize(str, sep, esc)
+    for (item in items) println(if (item.isEmpty()) "(empty)" else item)
+}