A simple type for building up Strings. Use as follows:

using StringBuilders

sb = StringBuilder()
append!(sb, "First string")
append!(sb, "Second string")

s = String(sb)

The advantage of StringBuilders.jl over using IOBuffer is in the API. Some may find The higher-level StringBuilders.jl API easier to use. For comparison, the example above using IOBuffer would be

io = IOBuffer()
write(io, "First string")
write(io, "Second String")
s = String(take!(io))
close(io)