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21 lines
633 B
Markdown
21 lines
633 B
Markdown
# Check For A Substring Match
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Using Erlang's `:binary.match` function, you can easily check if a string
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has a matching substring.
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```elixir
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> :binary.match("all food is good", "foo")
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{4, 3}
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> :binary.match("all food is good", "bar")
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:nomatch
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```
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As you can see, the return value on a successful match is a tuple with the
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index of where the match starts and the length of the match. If there is no
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match, the `:nomatch` atom is returned.
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See the [`match/2` and `match/3`
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docs](http://erlang.org/doc/man/binary.html#match-2) for more details.
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[source](http://stackoverflow.com/questions/35551072/how-to-find-index-of-a-substring)
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