Regarding std.array.Appender

[Suliman via Digitalmars-d-learn]

On Tuesday, 13 October 2015 at 13:34:02 UTC, John Colvin wrote:
> On Tuesday, 13 October 2015 at 13:21:54 UTC, Suliman wrote:
>> I tried to use map! but it's look like it do not work with 
>> string, becouse I got error: Error: no property 'map' for type 
>> 'ByLine!(char, char)'
>
> I suspect you don't have it imported.
>
> import std.algorithm;
>
> or
>
> import std.algorithm : map;

Thanks, you are right! Can I add with map some element before and 
after string? map!(a=> a~=" +") work fine, but how to add before 
at same time?