Difference between revisions of "StringIsNum"

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m (Tidied code and added more comments)
(example script rewritten)
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<lsl>
<lsl>
// This function returns TRUE or FALSE depending on if the input string consists entirely of numbers.
// this function will return TRUE if the entire string consists of number characters only
// It will return TRUE if the entire string is an integer number (whole number).
integer string_is_num(string input)
// It will return FALSE if the entire string is not an integer. Floating points, letters, symbols, and spaces will make it return FALSE.
{
    list numberCharacters = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"];
    integer stringLength = llStringLength(input);
 
    integer index;
    do
    {
        string character = llGetSubString(input, index, index);


integer StringIsNum(string input) {
        if (llListFindList(numberCharacters, [character]) == -1)
    integer length = llStringLength(input);  integer i;  integer verify;
            return FALSE;
   
    for(i = 0; i < length; i++) {
        string char = llGetSubString(input, i, i);


         //Compare each character in the string. For long strings, this may take time, and consume memory.
         ++index;
        if(char == "0" || char == "1" || char == "2" || char == "3" || char == "4" ||
          char == "5" || char == "6" || char == "7" || char == "8" || char == "9")
                //Do something. You can do whatever you like here, the variable is just a placeholder to keep the compiler happy.
                verify = TRUE;
         
        //Exit with FALSE at the first sign of a non numerical character
        else return FALSE;
     }
     }
      
     while (index < length);
    //Exit with TRUE if all characters are a number
 
     return TRUE;
     return TRUE;
}
}
//Below code is an example on how to use it. Since the returned value is a Boolean (0 or FALSE, 1 or TRUE) it can be used easily in if statements.


default
default
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     state_entry()
     state_entry()
     {
     {
         llListen(0, "", llGetOwner(), "");
        key owner = llGetOwner();
         llListen(PUBLIC_CHANNEL, "", owner, "");
     }
     }


     listen(integer channel, string name, key id, string message)
     listen(integer channel, string name, key id, string message)
     {      
     {
         //Respond if the string is a number
         //Respond if the string is a number
         if(StringIsNum(message)) llOwnerSay(message + " consists of numbers only.");
         if( StringIsNum(message) )
 
            llOwnerSay("'" + message + "' consists of numbers only.");
         //Respond if the string is NOT a number
         else
        if(!StringIsNum(message)) llOwnerSay(message + " has other characters in it!");
            llOwnerSay("'" + message + "' does not consist of numbers only.");
     }
     }
}
}
</lsl>
</lsl>

Revision as of 09:05, 7 October 2012

Due to my need of wanting a nice clean function to test an input and check if it consists entirely of numbers, I decided to write one myself, and share with the community.

This snippet is a fully working User Made Function. It is designed to be inserted into existing scripts to check if an input consists entirely of numbers, and will reject inputs that contain letters or symbols.

<lsl> // this function will return TRUE if the entire string consists of number characters only integer string_is_num(string input) { 

   list numberCharacters = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"];
   integer stringLength = llStringLength(input);

   integer index;
   do
   {
       string character = llGetSubString(input, index, index);

       if (llListFindList(numberCharacters, [character]) == -1)
           return FALSE;

       ++index;
   }
   while (index < length);

   return TRUE;

}

default { 

   state_entry()
   {
       key owner = llGetOwner();
       llListen(PUBLIC_CHANNEL, "", owner, "");
   }

   listen(integer channel, string name, key id, string message)
   {
       //Respond if the string is a number
       if( StringIsNum(message) )
           llOwnerSay("'" + message + "' consists of numbers only.");
       else
           llOwnerSay("'" + message + "' does not consist of numbers only.");
   }

} </lsl>

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