Range expansion: Difference between revisions
Added Delphi example
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{{out}}
<pre>[-6, -3, -2, -1, 3, 4, 5, 7, 8, 9, 10, 11, 14, 15, 17, 18, 19, 20]</pre>
=={{header|Delphi}}==
{{libheader| System.SysUtils}}
{{Trans|Go}}
<lang Delphi>
program Range_expansion;
{$APPTYPE CONSOLE}
uses
System.SysUtils;
const
input = '-6,-3--1,3-5,7-11,14,15,17-20';
var
r: TArray<Integer>;
last, i, n: Integer;
begin
for var part in input.Split([',']) do
begin
i := part.Substring(1).IndexOf('-');
if i = -1 then
begin
if not TryStrToInt(part, n) then
raise Exception.Create('Error: value invalid ' + part);
if Length(r) > 0 then
if last = n then
begin
raise Exception.Create('Error: Duplicate value:' + n.ToString);
end
else
begin
if last > n then
raise Exception.CreateFmt('Error: values not ordered: %s > %s', [last, n]);
end;
SetLength(r, Length(r) + 1);
r[High(r)] := n;
last := n;
end
else
begin
var n1 := 0;
var n2 := 0;
if not TryStrToInt(part.Substring(0, i + 1), n1) then
raise Exception.Create('Error: value invalid ' + part);
if not TryStrToInt(part.Substring(i + 2), n2) then
raise Exception.Create('Error: value invalid ' + part);
if n2 < n1 + 2 then
raise Exception.Create('Error: Invalid range' + part);
if Length(r) > 0 then
begin
if last = n1 then
raise Exception.Create('Error: Duplicate value: ' + n1.ToString);
if last > n1 then
raise Exception.CreateFmt('Error: Values not ordened: %d > %d', [last, n1]);
end;
for i := n1 to n2 do
begin
SetLength(r, Length(r) + 1);
r[High(r)] := i;
end;
last := n2;
end;
end;
write('expanded: ');
for var rr in r do
begin
write(rr, ',');
end;
readln;
end.</lang>
=={{header|DWScript}}==
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