Module:Check isxn: Difference between revisions

Module:Check isxn (view source)

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Revision as of 20:35, 4 January 2016 (view source) w>Trappist the monk (test issn for correct format;) ← Older edit		Latest revision as of 16:53, 23 April 2019 (view source) Emz (talk \| contribs) m (13 revisions imported)
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Line 52: local function check_isbn( isbn_str, error_string ) if nil ~= isbn_str:match("[^%s-0-9X]") then ~~return false; end~~ -- fail if isbn_str contains anything but digits, hyphens, or the uppercase X return error_string; end isbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" ); -- remove hyphens and spaces local len = isbn_str:len(); Line 61 ⟶ 63: if len == 10 then if isbn_str:match( "^%dX?$" ) == nil then ~~return false; end~~ return error_string; end return is_valid_isxn(isbn_str, 10) and '' or error_string; else local temp = 0; if isbn_str:match( "^97[89]%d$" ) == nil then ~~return false; end~~ -- isbn13 begins with 978 or 979; ismn begins with 979 return error_string; end return is_valid_isxn_13 (isbn_str) and '' or error_string; end Line 111 ⟶ 117: local valid_issn = true; if not id:match ('^%d%d%d%d%-%d%d%d[%ddX]$') then return error_string; end