String.replace_trailing

You're seeing just the function replace_trailing, go back to String module for more information.

replace_trailing(string, match, replacement)

Specs

replace_trailing(t(), t(), t()) :: t()

Replaces all trailing occurrences of match by replacement in string.

Returns the string untouched if there are no occurrences.

If match is "", this function raises an ArgumentError exception: this happens because this function replaces all the occurrences of match at the end of string, and it's impossible to replace "multiple" occurrences of "".

Examples

iex> String.replace_trailing("hello world", " world", "")
"hello"
iex> String.replace_trailing("hello world world", " world", "")
"hello"

iex> String.replace_trailing("hello world", " world", " mundo")
"hello mundo"
iex> String.replace_trailing("hello world world", " world", " mundo")
"hello mundo mundo"