package luaAvailable on lua
These are all externs for the base Lua "string" class, which functions as an additional set of string tools.
Note that all relevant indexes are "1" based.
Returns the internal numerical codes of the characters
str[index]. Note that numerical codes are not necessarily portable across platforms.
Receives zero or more integers. Returns a string with length equal to the number of arguments, in which each character has the internal numerical code equal to its corresponding argument. Note that numerical codes are not necessarily portable across platforms.
static charCodeAt (str:String, index:Int):Int
Returns the character code at position
Returns a string containing a binary representation of the given function, so that a later loadstring on this string returns a copy of the function. function must be a Lua function without upvalues.
Looks for the first match of pattern in the string
str. If it finds a match, then
find returns the indices of
str where this occurrence starts and ends.
If the target has captures, then in a successful match the captured values are also returned, after the two indices.
specifies where to start the search; its default value is
turns off the pattern matching facilities, so the function does a plain "find substring" operation, with no characters in pattern being considered "magic". Note that if plain is given, then
Returns a formatted version of its variable number of arguments following the description given in its first argument (which must be a string). The format string follows the same rules as the printf family of standard C functions. The only differences are that the options/modifiers
h are not supported and that there is an extra option,
q option formats a string in a form suitable to be safely read back by the Lua interpreter: the string is written between double quotes, and all double quotes, newlines, embedded zeros, and backslashes in the string are correctly escaped when written. For instance, the call
string.format('%q', 'a string with "quotes" and \n new line') will produce the string: `"a string with \"quotes\" and \
u, X-, and
x all expect a number as argument, whereas
s expect a string.
This function does not accept string values containing embedded zeros, except as arguments to the
Returns an iterator function that, each time it is called, returns the next captures from pattern over string
pattern specifies no captures, then the whole match is produced in each call.
Receives a string and returns its length. The empty string
"" has length
0. Embedded zeros are counted, so
"a\000bc\000" has length
Receives a string and returns a copy of this string with all uppercase letters changed to lowercase. All other characters are left unchanged. The definition of what an uppercase letter is depends on the current locale.
Looks for the first match of pattern in the string s. If it finds one, then match returns the captures from the pattern; otherwise it returns
null. If pattern specifies no captures, then the whole match is returned. The optional argument
n specifies where to start the search; its default value is
1 and can be negative.
Returns the substring of
str that starts at
start and continues until
end can be negative. If
end is absent, then it is assumed to be equal to
-1 (which is the same as the string length). In particular, the call
sub(str,1,end) returns a prefix of
str with length
sub(str, -end) returns a suffix of
str with length
Receives a string and returns a copy of this string with all lowercase letters changed to uppercase. All other characters are left unchanged. The definition of what a lowercase letter is depends on the current locale.
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