1 files changed, 28 insertions, 0 deletions
diff --git a/mystringlistunit.pas b/mystringlistunit.pas
index d37be08..a98e452 100644
--- a/mystringlistunit.pas
+++ b/mystringlistunit.pas
@@ -28,6 +28,7 @@ type
     procedure grep(expr: string; invert: boolean = false);
     function grepFirst(expr: string): string;
     procedure replace(von,nach: string);
+    procedure uniq(c: char);
     procedure append(sl: tMyStringList); overload;
     function hatZeile(zeile: string): boolean; // invers zu "grep -c"
     function eof: boolean;
@@ -228,6 +229,33 @@ begin
     self[i]:=re.replace(self[i],nach,true);
 end;
 
+procedure tMyStringlist.uniq(c: char);
+var
+  i:   longint;
+  dup: boolean;
+begin
+  case c of
+    '-': // only keep one line for each group
+      for i:=count-1 downto 1 do
+        if self[i]=self[i-1] then
+          delete(i);
+    'd': begin // only keep duplicate lines, one for each group
+      dup:=false;
+      for i:=count-1 downto 0 do begin
+        if (i>0) and (self[i]=self[i-1]) then begin
+          dup:=true;
+          delete(i);
+          continue;
+        end;
+        if not dup then
+          delete(i);
+        dup:=false;
+      end;
+    end;
+    else fehler('Unbekannte Option '''+c+''' für tMyStringList.uniq!');
+  end{of case};
+end;
+
 procedure tMyStringlist.append(sl: tMyStringList);
 var
   i: longint;