Utf8.len

Available since: Gideros 2016.06
Class: utf8

Description

Returns the number of UTF-8 characters in string s that start between positions i and j (both inclusive).

(number) = utf8.len(s,i,j)

The default for i is 1 and for j is -1. If it finds any invalid byte sequence, returns a false value plus the position of the first invalid byte.

Parameters

s: (string) string
i: (number) start at position optional
j: (number) end at position optional

Return values

Returns (number) number of characters

Example

local str = "Hélène"
local str_length = utf8.len(str)

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• Utf8
• Utf8.byte
• Utf8.char
• Utf8.charpattern
• Utf8.charpos
• Utf8.codepoint
• Utf8.codes
• Utf8.escape
• Utf8.find
• Utf8.fold
• Utf8.gmatch
• Utf8.gsub
• Utf8.insert
• Utf8.len
• Utf8.lower
• Utf8.match
• Utf8.ncasecmp
• Utf8.next
• Utf8.offset
• Utf8.remove
• Utf8.reverse
• Utf8.sub
• Utf8.title
• Utf8.upper
• Utf8.width
• Utf8.widthindex

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