String Addon

explode

table string.explode(string str, string delim)

Splits string 'str' by delimiter 'delim'. Returns results as a table.

trim

string string.trim(string str)

"Trim" whitespace off head and tail of string 'str', return result.

random

string string.random(string type, number length)

Creates a random string based on the given type and with 'length' characters. 'type' should be:

"alnum"	Alpha-numeric (both upper and lower case) characters
"letters"	Letters only (both upper and lower case)
"numbers"	Numeric characters only

toUnicode

string string.toUnicode(string str)

Attempt to convert the input string 'str' to a wide string.

likeness

percent,differences string.likeness(string str1, string str2)

Computes how alike two strings are and returns two numbers: 'percent' (a float) of how similar they are and 'differences' (an integer) which is the number of differences found between them. This function is case-sensitive; if you would like to have it be case insensitive, consider casting both strings to lower-case before passing them to this function.

This function uses the Levenshtein distance algorithm. An important thing to note is that it is not a direct column-to-column comparison, but will instead consider string shifting where available. For example:

  local str1 = "HelloWorld";
  local str2 = "Hello World":

  print("Likeness:", string.likeness(str1, str2));
  --[[
    Prints: Likeness:    90.909090 1
    These two should have only one difference: the space between them! They are ~91% similar
    NOT 6 differences (everything after 'Hello').
  --]]

  local str1 = "Hello World";
  local str2 = "hello world":
  --[[
    Prints: Likeness:    81.818181 2
     These two strings have two differences (the 'W' and 'H' due to case-sensitivity)
  --]]
  print("Likeness:", string.likeness(str1, str2));