Building & Editing

Methods that produce a modified copy of the string - concatenating, inserting, replacing, stripping and padding. The original is never mutated.

.append(...parts) → string

Concatenates each part onto the end.

.prepend(...parts) → string

Concatenates each part onto the front.

log "ab".append("cd", "ef")  // "abcdef"
log "ab".prepend("XY")       // "XYab"

.insert(index, str) → string

Inserts str before position index (1-indexed).

log "abc".insert(2, "X")  // "aXbc"

.replace(old, new) → string

Replaces all occurrences of old with new.

.replaceFirst(old, new) → string

Replaces only the first occurrence.

log "Hello".replace("l", "L")       // "HeLLo"
log "Hello".replaceFirst("l", "L")  // "HeLlo"

.stripStart(prefix) → string

Removes prefix from the start, if present.

.stripEnd(suffix) → string

Removes suffix from the end, if present.

log "hello".stripStart("he")  // "llo"
log "hello".stripEnd("lo")    // "hel"

.padStart(char, length) → string

Pads the front with char until the string is at least length long.

.padEnd(char, length) → string

Pads the end with char until the string is at least length long.

log "5".padStart("0", 3)  // "005"
log "5".padEnd("0", 3)    // "500"