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Run-length encoding: Difference between revisions
added Ceylon
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Line 903:
});
}
}</lang>
=={{header|Ceylon}}==
<lang ceylon>shared void run() {
"Takse a string such as aaaabbbbbbcc and returns 4a6b2c"
String compress(String string) {
if (exists firstChar = string.first) {
if (exists index = string.firstIndexWhere((char) => char != firstChar)) {
return "``index````firstChar````compress(string[index...])``";
}
else {
return "``string.size````firstChar``";
}
}
else {
return "";
}
}
"Takse a string such as 4a6b2c and returns aaaabbbbbbcc"
String decompress(String string) =>
let (runs = string.split(Character.letter, false).paired)
"".join {
for ([length, char] in runs)
if (is Integer int = Integer.parse(length))
char.repeat(int)
};
assert (compress("aaaabbbbbaa") == "4a5b2a");
assert (decompress("4a6b2c") == "aaaabbbbbbcc");
assert (compress("WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW") == "12W1B12W3B24W1B14W");
assert (decompress("24a") == "aaaaaaaaaaaaaaaaaaaaaaaa");
}</lang>
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