Deprecated: ForEachCombination is deprecated.

Deprecated: GenerateAllPermutations is deprecated.

Deprecated: GenerateCombinations is deprecated.

GenerateNonOverlappingReplacements calls ReplaceNext of any non overlapping group until no replacements left.

GenerateReplacements calls ReplaceNext until no replacements left.

ReplaceNext replaces the first occurrence of the substring `old` in the string `str` starting from index `i` with the substring `new` returning the index after the replaced substring and the new string or -1 if `old` is not found.