Value methods
Langoost values carry built-in methods, called with dot syntax — value.method(args).
This page lists the methods on each primitive type. (Array methods are covered in
full on the arrays page.)
String methods
let s = " Hello, World "
println(s.trim().lower()) // "hello, world"| Method | Description |
|---|---|
len | Length in bytes |
upper() / lower() | Change case |
trim([cutset]) / trimLeft([cutset]) / trimRight([cutset]) | Trim whitespace or a cutset |
split(sep) | Split into a string[] |
contains(sub) | Whether sub occurs |
hasPrefix(p) / hasSuffix(s) | Prefix / suffix test |
startsWith(p) / endsWith(s) | Aliases for the above |
replace(old, new) | Replace all occurrences |
replaceFirst(old, new) | Replace the first occurrence |
indexOf(sub) / lastIndexOf(sub) | First / last index (−1 if absent) |
slice(start, end) | Substring [start, end) (negative indices allowed) |
repeat(n) | Repeat n times |
padLeft(width, fill?) / padRight(width, fill?) | Pad to a width |
format(...args) | sprintf-style (%s, %d, %f, %v) |
toInt() / toFloat() | Parse to a number (0 on failure) |
isEmpty() | Whether the string is empty |
Array methods
Arrays support push, pop, first, last, slice, contains, indexOf,
join, reverse, sort, flatten, and the higher-order map, filter,
reduce, forEach, find, findIndex, every, and some. See
arrays for signatures and examples.
Number methods
println((255).toBase(16)) // "ff"
println((-3).abs()) // 3
println((3.9).toInt()) // 3Int: toString(), toFloat(), toBase(base), abs()
Float: toString(), toInt() (truncates), abs()
Bool: toString()
Many of these overlap with the global built-ins (toString, toInt,
toFloat) and the strings and
types modules — use whichever reads best.