Module:String: Difference between revisions
(update renamed variable) |
(Implement the merge of Module:Join, Module:Str endswith, Module:PatternCount and Module:Text count into this module per their TfDs. Review and discussion is at https://en.wikipedia.org/w/index.php?title=Module_talk:String&oldid=899040020#Edit_request_to_implement_merges) |
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]] | ]] | ||
function str.len( frame ) | function str.len( frame ) | ||
local new_args = str._getParameters( frame.args, {'s'} ) | local new_args = str._getParameters( frame.args, {'s'} ) | ||
local s = new_args['s'] or '' | local s = new_args['s'] or '' | ||
return mw.ustring.len( s ) | return mw.ustring.len( s ) | ||
end | end | ||
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]] | ]] | ||
function str.sub( frame ) | function str.sub( frame ) | ||
local new_args = str._getParameters( frame.args, { 's', 'i', 'j' } ) | local new_args = str._getParameters( frame.args, { 's', 'i', 'j' } ) | ||
local s = new_args['s'] or '' | local s = new_args['s'] or '' | ||
local i = tonumber( new_args['i'] ) or 1 | local i = tonumber( new_args['i'] ) or 1 | ||
local j = tonumber( new_args['j'] ) or -1 | local j = tonumber( new_args['j'] ) or -1 | ||
local len = mw.ustring.len( s ) | local len = mw.ustring.len( s ) | ||
-- Convert negatives for range checking | -- Convert negatives for range checking | ||
if i < 0 then | if i < 0 then | ||
i = len + i + 1 | i = len + i + 1 | ||
end | end | ||
if j < 0 then | if j < 0 then | ||
j = len + j + 1 | j = len + j + 1 | ||
end | end | ||
if i > len or j > len or i < 1 or j < 1 then | if i > len or j > len or i < 1 or j < 1 then | ||
return str._error( 'String subset index out of range' ) | return str._error( 'String subset index out of range' ) | ||
end | end | ||
if j < i then | if j < i then | ||
return str._error( 'String subset indices out of order' ) | return str._error( 'String subset indices out of order' ) | ||
end | end | ||
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function str._match( s, pattern, start, match_index, plain_flag, nomatch ) | function str._match( s, pattern, start, match_index, plain_flag, nomatch ) | ||
if s == '' then | if s == '' then | ||
return str._error( 'Target string is empty' ) | return str._error( 'Target string is empty' ) | ||
end | end | ||
if pattern == '' then | if pattern == '' then | ||
return str._error( 'Pattern string is empty' ) | return str._error( 'Pattern string is empty' ) | ||
end | end | ||
start = tonumber(start) or 1 | start = tonumber(start) or 1 | ||
if math.abs(start) < 1 or math.abs(start) > mw.ustring.len( s ) then | if math.abs(start) < 1 or math.abs(start) > mw.ustring.len( s ) then | ||
return str._error( 'Requested start is out of range' ) | return str._error( 'Requested start is out of range' ) | ||
end | end | ||
if match_index == 0 then | if match_index == 0 then | ||
return str._error( 'Match index is out of range' ) | return str._error( 'Match index is out of range' ) | ||
end | end | ||
if plain_flag then | if plain_flag then | ||
pattern = str._escapePattern( pattern ) | pattern = str._escapePattern( pattern ) | ||
end | end | ||
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else | else | ||
if start > 1 then | if start > 1 then | ||
s = mw.ustring.sub( s, start ) | s = mw.ustring.sub( s, start ) | ||
end | end | ||
local iterator = mw.ustring.gmatch(s, pattern) | local iterator = mw.ustring.gmatch(s, pattern) | ||
if match_index > 0 then | if match_index > 0 then | ||
-- Forward search | -- Forward search | ||
for w in iterator do | for w in iterator do | ||
match_index = match_index - 1 | match_index = match_index - 1 | ||
if match_index == 0 then | if match_index == 0 then | ||
result = w | result = w | ||
break | break | ||
end | end | ||
end | end | ||
else | else | ||
-- Reverse search | -- Reverse search | ||
local result_table = {} | local result_table = {} | ||
local count = 1 | local count = 1 | ||
for w in iterator do | for w in iterator do | ||
result_table[count] = w | result_table[count] = w | ||
count = count + 1 | count = count + 1 | ||
end | end | ||
result = result_table[ count + match_index ] | result = result_table[ count + match_index ] | ||
end | end | ||
end | end | ||
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if result == nil then | |||