How to convert array of string to string?

Question

How can I convert array of string to string? Or any idea else?

I am doing it like this:

var
    s:string;
    i:integer;
begin
    for i:=1 to 10000 do
    begin
        if (i mod 2)=0 then
            s:='a'+s
        else
            s:='b'+s;

    end;
end;

And as you see i is going to large number 1000 or 10000 or 10000 so it means 10000 times I have to do this, how can I do this very short time..Using array? Please an example code..

Looks like this is what you are after? stackoverflow.com/questions/686413/delphi-stringbuilder — user447356
– user447356, Commented Aug 21, 2011 at 8:48

David Heffernan · Accepted Answer · 2011-08-21 09:38:04Z

2

SetLength(s, n);
for i := 1 to n do
  s[i] := ...

Is the idiom you need.

Your code is slow because it performs memory allocation and copying on every iteration. This approach of pre-allocating the buffer avoids that.

edited Aug 21, 2011 at 9:38

answered Aug 21, 2011 at 8:53

David Heffernan

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