Excel Lambda functions for Power Query Text functions

EXTEXT

/* USE NAMESPACE "Text" */

AfterDelimeter = LAMBDA(_text, delimiter, [_index], _text);

At = LAMBDA(_text, _index, MID(_text, _index, 1));

BeforeDelimeter = LAMBDA(_text, delimiter, [_index], _text);

BetweenDelimeters = LAMBDA(_text, _startDelimiter, _endDelimiter, [_startIndex], [_endIndex], _text);

Clean = LAMBDA(_text, CLEAN(_text));

Contains = LAMBDA(_text, _substring,
    LAMBDA(_text, IFERROR(FIND(_substring, _text), FALSE))
);