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how can i search if string exist in array ?

Posted on 2016-11-21
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Last Modified: 2016-11-21
i have this array of string

function Explode(const Separator, S: string; Limit: Integer = 0): TArray;
var
  SepLen       : Integer;
  F, P         : PChar;
  ALen, Index  : Integer;
begin
  SetLength(Result, 0);
  if (S = '') or (Limit < 0) then
    Exit;
  if Separator = '' then
  begin
    SetLength(Result, 1);
    Result[0] := S;
    Exit;
  end;
  SepLen := Length(Separator);
  ALen := Limit;
  SetLength(Result, ALen);

  Index := 0;
  P := PChar(S);
  while P^ <> #0 do
  begin
    F := P;
    P := StrPos(P, PChar(Separator));
    if (P = nil) or ((Limit > 0) and (Index = Limit - 1)) then
      P := StrEnd(F);
    if Index >= ALen then
    begin
      Inc(ALen, 5); //
      SetLength(Result, ALen);
    end;
    SetString(Result[Index], F, P - F);
    Inc(Index);
    if P^ <> #0 then
      Inc(P, SepLen);
  end;
  if Index < ALen then
    SetLength(Result, Index); //
end;


type
TArray = array of string;

.....

var
 arr: TArray;
begin
arr := explode(',', 'Mark,Michel,segment,');
//so this result will become arr[0] << Mark etc..
end;

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as the code clearly shows that i can get arrays from arr variable
but i want to search in all arr

as example
if arr contain 'Mark' then 

do somthing ..

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0
Comment
Question by:dolphin King
  • 2
3 Comments
 
LVL 25

Expert Comment

by:Sinisa Vuk
ID: 41896680
I assume that Explode function is not yours. But anyway... here it is...
var
  i: Integer;
...
arr := explode(',', 'Mark,Michel,segment,');
for i := Low(arr) to High(arr) do
begin
  if arr[i] = 'Mark' then //or use common Pos function if like.... and you can compare UpperCase too...
  begin
     //do something....
     Break; //go out of loop
  end;
end;

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0
 

Author Comment

by:dolphin King
ID: 41896692
i know that i can loop , i did not want to do that i was trying to search directly inside the arrays ,

explode functions are all over google search ...
0
 
LVL 25

Accepted Solution

by:
Sinisa Vuk earned 500 total points
ID: 41896713
So, you don't need explode string as an array elements...
If you use Pos function?
,,,
if Pos(  ',' + 'Mark' + ',' , ',' + 'Mark,Michel,segment,' + ',') > 0 then
begin
 //...
end;

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I concatenate separator to both strings at the start and the end of strings...
0

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