Difference between revisions of "RandomString"
Ugleh Ulrik (talk | contribs) |
Omei Qunhua (talk | contribs) (Shorter ByteCode example) |
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} | } | ||
while(length > ++p); | while(length > ++p); | ||
return emp; | |||
} | |||
</lsl> | |||
Because strings held in lists occupy an overhead of 18 bytes per string, the above functionality can be written using less bytecode space by holding | |||
the alphabet in one string and extracting letters with llGetSubString(). The following user defined function is about 200 bytes shorter in Mono ByteCode than the previous UDF. | |||
<lsl> | |||
string RandomString(integer length) | |||
{ | |||
string characters = "abcdefghijklmnopqrstuvwxyz"; | |||
string emp; | |||
integer p; | |||
integer q; | |||
do | |||
{ | |||
q = (integer) llFrand(26); | |||
emp += llGetSubString(characters, q, q); | |||
} | |||
while(++p < length); | |||
return emp; | return emp; | ||
} | } | ||
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//Says something like fvl3d2zv4z</lsl> | //Says something like fvl3d2zv4z</lsl> | ||
|helpers | |helpers | ||
|notes | |notes | ||
Revision as of 11:26, 10 January 2013
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Summary
Function: string RandomString( integer length );Returns a string that is made up of random letters and numbers based on the length given.
| • integer | length | – | List of Random String |
See also: String
Specification
<lsl>//This version provides random numbers and letters string RandomString(integer length) { list characters = ["0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]; string emp; integer p;
do{
emp += llList2String(characters, llRound(llFrand(llGetListLength(characters) - 0 + 1 )));
}
while(length > ++p);
return emp;
}</lsl>
<lsl>//This version is only strings string RandomString(integer length) { list characters = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]; string emp; integer p;
do{
emp += llList2String(characters, llRound(llFrand(llGetListLength(characters) - 0 + 1 )));
}
while(length > ++p);
return emp;
} </lsl> Because strings held in lists occupy an overhead of 18 bytes per string, the above functionality can be written using less bytecode space by holding the alphabet in one string and extracting letters with llGetSubString(). The following user defined function is about 200 bytes shorter in Mono ByteCode than the previous UDF.
<lsl> string RandomString(integer length) {
string characters = "abcdefghijklmnopqrstuvwxyz";
string emp;
integer p;
integer q;
do
{
q = (integer) llFrand(26);
emp += llGetSubString(characters, q, q);
}
while(++p < length);
return emp;
} </lsl>
Caveats
- The random String is created using the list, if you want to restrict some letters, or add more characters just add to the list.
Examples
<lsl> default {
touch_start(integer total_number)
{
llSay(0, RandomString(10));
}
}
//Says something like fvl3d2zv4z</lsl>