difference for !strcmp and strcmp?

[Johxz]

In the tutorial doc use this example !strcmp I was thinking that is Logical NOT, but isn't. Someone can explain this to me?

 

if(!strcmp(%userName, "Heather"))
      echo("User Found: " @ %userName);
   else if(%userName $= "Mich")
      echo("User Found: " @ %userName);
   else 
      echo("User " @ %userName @ " not found");

 

From the Tscript reference use this example. What is the difference?

if( strcmp( %var, "foobar" ) == 0 )
   echo( "%var is equal to 'foobar'" );

[JeffH]

both are equivalent. !strcmp is the same thing as strcmp == 0. When the strings are equal, it returns 0.

[buckmaster]

! is the boolean negation operator (it means not). !0==1 and !1==0 (and, IIRC, !2==0, !#==0, etc.). strcmp returns 0 if the two strings are equal, so !strcmp will return 1 if they're equal (or 0 if they're not equal).

[Johxz]

Is this correct?

 

// Testing 1
function matchNum1(%numBer)
{
   if(strcmp(%numBer, "0"))
      echo("Number 0 Found.");
   else if(strcmp(%numBer, "1"))
      echo("Number 1 Found.");
   else 
      echo("Number " @ %numBer @ " not found");
}

 

Output:

matchNum1(0);
Number 1 Found 
matchNum1(1);
Number 0 Found

 

// Testing 2
function matchNum2(%numBer)
{
   if(!strcmp(%numBer, "0"))
      echo("Number 0 Found.");
   else if(!strcmp(%numBer, "1"))
      echo("Number 1 Found.");
   else 
      echo("Number " @ %numBer @ " not found");
}

 

Output:

matchNum2(0);
Number 0 Found 
matchNum1(1);
Number 1 Found

[buckmaster]

Yep!

[Johxz]

hahaha so sorry mate :lol: I was a little tired that day :oops: I use my free time to learn t3d...

[JeffR]

Hey, people gotta learn what strcmp is/does at some point in time. It's no biggie.

Also, in TS, there's a string comparitor operator

 

if(%myString $= "ThingIWantToCheck") 
  return "woo";
if(%myString !$= "ThingIWantToCheck") 
  return "boo";

 

If you know you're dealing with strings, it can be a bit easier to just use that instead of using the strcmp function.