util.string.fold

local result = util.string.fold(
    input
)

Type	Name	Description
`string` \| `int`	input	String to fold, or a single codepoint

Type	Name	Description
`string` \| `int`	result	Case-folded string, or the folded codepoint if input was a number

Fold a string for caseless comparison

local result = util.string.fold("HELLO")

core.engine.print("info", result) -- 'hello'

Compare two strings caselessly across scripts

local a = util.string.fold("Straße")
local b = util.string.fold("STRASSE")

core.engine.print("info", a == b) -- true

Use fold instead of lower for non-Latin scripts

local result = util.string.fold("İstanbul")

core.engine.print("info", result) -- folds 'İ' correctly, unlike a plain lower()