JuliaLang/julia — pull request #1229 by kmsquire (2012-08-28 08:43:43+00:00)
Title: Added filter(), has() to string.jl

```julia
julia> filter(c -> c < 'm', "abracadabra")
"abacadaba"

julia> has("abracadabra", 'a')
true

julia> has("abracadabra", 'e')
false
```