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utf8.len#512309

<function name="len" parent="utf8" type="libraryfunc">⤶ <description>Returns the number of UTF-8 sequences in the given string between positions startPos and endPos (both inclusive). If it finds any invalid UTF-8 byte sequence, returns false as well as the position of the first invalid byte.</description>⤶ <realm>Shared</realm>⤶ <file line="197-L224">lua/includes/modules/utf8.lua</file>⤶ <args>⤶ <arg name="string" type="string">The string to calculate the length of.</arg>⤶ <arg name="startPos" type="number" default="1">The starting position to get the length from.</arg>⤶ <arg name="endPos" type="number" default="-1">The ending position to get the length from.</arg>⤶ </args>⤶ <rets>⤶ <ret name="" type="number">The number of UTF-8 characters in the string. If there are invalid bytes, this will be false.</ret>⤶ <ret name="" type="number">The position of the first invalid byte. If there were no invalid bytes, this will be nil.</ret>⤶ </rets>⤶ </function>⤶ ⤶ <example>⤶ <description>Demonstrates output of this function compared to <page>string.len</page> when given a string that contains Russian text.</description>⤶ <code>⤶ print( string.len( "Мёнём" ) )⤶ print( utf8.len( "Мёнём" ) )⤶ </code>⤶ <output>⤶ ⤶ ```⤶ 11⤶ 5⤶ ```⤶ ⤶ </output>⤶ ⤶ </example>

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