Модуль:String: различия между версиями

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Модуль:String (посмотреть исходный код)

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--[[
--[[


This module is intended to provide access to basic string functions.
This module is intended to provide access to basic string functions.


Most of the functions provided here can be invoked with named parameters,
Most of the functions provided here can be invoked with named parameters,  
unnamed parameters, or a mixture.  If named parameters are used, Mediawiki will
unnamed parameters, or a mixture.  If named parameters are used, Mediawiki will  
automatically remove any leading or trailing whitespace from the parameter.
automatically remove any leading or trailing whitespace from the parameter.
Depending on the intended use, it may be advantageous to either preserve or
Depending on the intended use, it may be advantageous to either preserve or
remove such whitespace.
remove such whitespace.


Global options
Global options
     ignore_errors: If set to 'true' or 1, any error condition will result in
     ignore_errors: If set to 'true' or 1, any error condition will result in  
         an empty string being returned rather than an error message.
         an empty string being returned rather than an error message.
 
       
     error_category: If an error occurs, specifies the name of a category to
     error_category: If an error occurs, specifies the name of a category to  
         include with the error message.  The default category is
         include with the error message.  The default category is
         [Category:Errors reported by Module String].
         [Category:Errors reported by Module String].
 
       
     no_category: If set to 'true' or 1, no category will be added if an error
     no_category: If set to 'true' or 1, no category will be added if an error
         is generated.
         is generated.
 
       
Unit tests for this module are available at Module:String/tests.
Unit tests for this module are available at Module:String/tests.
]]
]]


local str = {}
local str = {}
--[[
subcount
This function returns the count of substring in source string.
Usage:
{{#invoke:String|subcount|source_string|substring|plain_flag}}
OR
{{#invoke:String|subcount|s=source_string|pattern=substring|plain=plain_flag}}
Parameters
    s: The string to search
    pattern: The pattern or string to find within the string
    plain: A flag indicating that the substring should be understood as plain
        text. Defaults to true.
If invoked using named parameters, Mediawiki will automatically remove any leading or
trailing whitespace from the target string. 
]]
function str.subcount( frame )
    local new_args = str._getParameters( frame.args, {'s', 'pattern', 'plain'} );
    local s = new_args['s'] or '';
    local plain_flag = str._getBoolean( new_args['plain'] or true );
    local pattern = new_args['pattern'] or '';
    if s == '' or pattern == '' then
    return 0;
    end
   
    if plain_flag then
        pattern = str._escapePattern( pattern );
    end
   
    local _, count = mw.ustring.gsub(s, pattern, "")
    return count;
end


--[[
--[[
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If invoked using named parameters, Mediawiki will automatically remove any leading or
If invoked using named parameters, Mediawiki will automatically remove any leading or
trailing whitespace from the target string.
trailing whitespace from the target string.
]]
]]
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


Строка 59: Строка 95:
Parameters
Parameters
     s: The string to return a subset of
     s: The string to return a subset of
     i: The first index of the substring to return, defaults to 1.
     i: The fist index of the substring to return, defaults to 1.
     j: The last index of the string to return, defaults to the last character.
     j: The last index of the string to return, defaults to the last character.
 
   
The first character of the string is assigned an index of 1.  If either i or j
The first character of the string is assigned an index of 1.  If either i or j
is a negative value, it is interpreted the same as selecting a character by
is a negative value, it is interpreted the same as selecting a character by  
counting from the end of the string.  Hence, a value of -1 is the same as
counting from the end of the string.  Hence, a value of -1 is the same as  
selecting the last character of the string.
selecting the last character of the string.


If the requested indices are out of range for the given string, an error is
If the requested indices are out of range for the given string, an error is  
reported.
reported.
]]
]]
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
if i < 0 then
i = len + i + 1
end
if j < 0 then
j = len + j + 1
end
 
if i > len or j > len or i < 1 or j < 1 then
return str._error( 'String subset index out of range' )
end
if j < i then
return str._error( 'String subset indices out of order' )
end


return mw.ustring.sub( s, i, j )
    -- Convert negatives for range checking
    if i < 0 then
        i = len + i + 1;
    end
    if j < 0 then
        j = len + j + 1;
    end
   
    if i > len or j > len or i < 1 or j < 1 then
        return str._error( 'Значение индекса подстроки выходит за допустимые границы' );
    end
    if j < i then
        return str._error( 'Неверный порядок индексов подстроки' );
    end
   
    return mw.ustring.sub( s, i, j )
end
end


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]]
]]
function str.sublength( frame )
function str.sublength( frame )
local i = tonumber( frame.args.i ) or 0
    local i = tonumber( frame.args.i ) or 0
local len = tonumber( frame.args.len )
    local len = tonumber( frame.args.len )
return mw.ustring.sub( frame.args.s, i + 1, len and ( i + len ) )
    return mw.ustring.sub( frame.args.s, i + 1, len and ( i + len ) )
end
 
--[[
_match
 
This function returns a substring from the source string that matches a
specified pattern. It is exported for use in other modules
 
Usage:
strmatch = require("Module:String")._match
sresult = strmatch( s, pattern, start, match, plain, nomatch )
 
Parameters
    s: The string to search
    pattern: The pattern or string to find within the string
    start: The index within the source string to start the search.  The first
        character of the string has index 1.  Defaults to 1.
    match: In some cases it may be possible to make multiple matches on a single
        string.  This specifies which match to return, where the first match is
        match= 1.  If a negative number is specified then a match is returned
        counting from the last match.  Hence match = -1 is the same as requesting
        the last match.  Defaults to 1.
    plain: A flag indicating that the pattern should be understood as plain
        text.  Defaults to false.
    nomatch: If no match is found, output the "nomatch" value rather than an error.
 
For information on constructing Lua patterns, a form of [regular expression], see:
 
* http://www.lua.org/manual/5.1/manual.html#5.4.1
* http://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#Patterns
* http://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#Ustring_patterns
 
]]
-- This sub-routine is exported for use in other modules
function str._match( s, pattern, start, match_index, plain_flag, nomatch )
if s == '' then
return str._error( 'Target string is empty' )
end
if pattern == '' then
return str._error( 'Pattern string is empty' )
end
start = tonumber(start) or 1
if math.abs(start) < 1 or math.abs(start) > mw.ustring.len( s ) then
return str._error( 'Requested start is out of range' )
end
if match_index == 0 then
return str._error( 'Match index is out of range' )
end
if plain_flag then
pattern = str._escapePattern( pattern )
end
 
local result
if match_index == 1 then
-- Find first match is simple case
result = mw.ustring.match( s, pattern, start )
else
if start > 1 then
s = mw.ustring.sub( s, start )
end
 
local iterator = mw.ustring.gmatch(s, pattern)
if match_index > 0 then
-- Forward search
for w in iterator do
match_index = match_index - 1
if match_index == 0 then
result = w
break
end
end
else
-- Reverse search
local result_table = {}
local count = 1
for w in iterator do
result_table[count] = w
count = count + 1
end
 
result = result_table[ count + match_index ]
end
end
 
if result == nil then
if nomatch == nil then
return str._error( 'Match not found' )
else
return nomatch
end
else
return result
end
end
end


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match
match


This function returns a substring from the source string that matches a
This function returns a substring from the source string that matches a  
specified pattern.
specified pattern.


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{{#invoke:String|match|source_string|pattern_string|start_index|match_number|plain_flag|nomatch_output}}
{{#invoke:String|match|source_string|pattern_string|start_index|match_number|plain_flag|nomatch_output}}
OR
OR
{{#invoke:String|match|s=source_string|pattern=pattern_string|start=start_index
{{#invoke:String|pos|s=source_string|pattern=pattern_string|start=start_index
     |match=match_number|plain=plain_flag|nomatch=nomatch_output}}
     |match=match_number|plain=plain_flag|nomatch=nomatch_output}}


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     start: The index within the source string to start the search.  The first
     start: The index within the source string to start the search.  The first
         character of the string has index 1.  Defaults to 1.
         character of the string has index 1.  Defaults to 1.
     match: In some cases it may be possible to make multiple matches on a single
     match: In some cases it may be possible to make multiple matches on a single  
         string.  This specifies which match to return, where the first match is
         string.  This specifies which match to return, where the first match is  
         match= 1.  If a negative number is specified then a match is returned
         match= 1.  If a negative number is specified then a match is returned  
         counting from the last match.  Hence match = -1 is the same as requesting
         counting from the last match.  Hence match = -1 is the same as requesting
         the last match.  Defaults to 1.
         the last match.  Defaults to 1.
Строка 226: Строка 169:


If invoked using named parameters, Mediawiki will automatically remove any leading or
If invoked using named parameters, Mediawiki will automatically remove any leading or
trailing whitespace from each string.  In some circumstances this is desirable, in
trailing whitespace from each string.  In some circumstances this is desirable, in  
other cases one may want to preserve the whitespace.
other cases one may want to preserve the whitespace.


If the match_number or start_index are out of range for the string being queried, then
If the match_number or start_index are out of range for the string being queried, then
this function generates an error.  An error is also generated if no match is found.
this function generates an error.  An error is also generated if no match is found.
If one adds the parameter ignore_errors=true, then the error will be suppressed and
If one adds the parameter ignore_errors=true, then the error will be suppressed and  
an empty string will be returned on any failure.
an empty string will be returned on any failure.


Строка 241: Строка 184:


]]
]]
-- This is the entry point for #invoke:String|match
function str.match( frame )
function str.match( frame )
local new_args = str._getParameters( frame.args, {'s', 'pattern', 'start', 'match', 'plain', 'nomatch'} )
    local new_args = str._getParameters( frame.args, {'s', 'pattern', 'start', 'match', 'plain', 'nomatch'} );
local s = new_args['s'] or ''
    local s = new_args['s'] or '';
local start = tonumber( new_args['start'] ) or 1
    local start = tonumber( new_args['start'] ) or 1;
local plain_flag = str._getBoolean( new_args['plain'] or false )
    local plain_flag = str._getBoolean( new_args['plain'] or false );
local pattern = new_args['pattern'] or ''
    local pattern = new_args['pattern'] or '';
local match_index = math.floor( tonumber(new_args['match']) or 1 )
    local match_index = math.floor( tonumber(new_args['match']) or 1 );
local nomatch = new_args['nomatch']
    local nomatch = new_args['nomatch'];
 
   
return str._match( s, pattern, start, match_index, plain_flag, nomatch )
    if s == '' then
        return str._error( 'Пустая строка поиска' );
    end
    if pattern == '' then
        return str._error( 'Пустой шаблон поиска' );
    end
    if math.abs(start) < 1 or math.abs(start) > mw.ustring.len( s ) then
        return str._error( 'Индекс начала поиска выходит за допустимые границы' );
    end
    if match_index == 0 then
        return str._error( 'Индекс совпадения выходит за допустимые границы' );
    end
    if plain_flag then
        pattern = str._escapePattern( pattern );
    end
   
    local result
    if match_index == 1 then
        -- Find first match is simple case
        result = mw.ustring.match( s, pattern, start )
    else
        if start > 1 then
            s = mw.ustring.sub( s, start );
        end
       
        local iterator = mw.ustring.gmatch(s, pattern);
        if match_index > 0 then
            -- Forward search
            for w in iterator do
                match_index = match_index - 1;
                if match_index == 0 then
                    result = w;
                    break;
                end
            end   
        else
            -- Reverse search
            local result_table = {};
            local count = 1;
            for w in iterator do
                result_table[count] = w;
                count = count + 1;
            end
           
            result = result_table[ count + match_index ];           
        end
    end       
   
    if result == nil then
        if nomatch == nil then
            return str._error( 'Совпадение не найдено' );
        else
            return nomatch;
        end
    else
        return result;
    end
end
end


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If invoked using named parameters, Mediawiki will automatically remove any leading or
If invoked using named parameters, Mediawiki will automatically remove any leading or
trailing whitespace from the target string.  In some circumstances this is desirable, in
trailing whitespace from the target string.  In some circumstances this is desirable, in  
other cases one may want to preserve the whitespace.
other cases one may want to preserve the whitespace.


The first character has an index value of 1.
The first character has an index value of 1.


If one requests a negative value, this function will select a character by counting backwards
If one requests a negative value, this function will select a character by counting backwards  
from the end of the string.  In other words pos = -1 is the same as asking for the last character.
from the end of the string.  In other words pos = -1 is the same as asking for the last character.


Строка 280: Строка 278:
]]
]]
function str.pos( frame )
function str.pos( frame )
local new_args = str._getParameters( frame.args, {'target', 'pos'} )
    local new_args = str._getParameters( frame.args, {'target', 'pos'} );
local target_str = new_args['target'] or ''
    local target_str = new_args['target'] or '';
local pos = tonumber( new_args['pos'] ) or 0
    local pos = tonumber( new_args['pos'] ) or 0;


if pos == 0 or math.abs(pos) > mw.ustring.len( target_str ) then
    if pos == 0 or math.abs(pos) > mw.ustring.len( target_str ) then
return str._error( 'String index out of range' )
        return str._error( 'Значение индекса строки выходит за допустимые границы' );
end
    end  
 
   
return mw.ustring.sub( target_str, pos, pos )
    return mw.ustring.sub( target_str, pos, pos );
end
end


Строка 295: Строка 293:


This function duplicates the behavior of {{str_find}}, including all of its quirks.
This function duplicates the behavior of {{str_find}}, including all of its quirks.
This is provided in order to support existing templates, but is NOT RECOMMENDED for
This is provided in order to support existing templates, but is NOT RECOMMENDED for  
new code and templates.  New code is recommended to use the "find" function instead.
new code and templates.  New code is recommended to use the "find" function instead.


Строка 306: Строка 304:
]]
]]
function str.str_find( frame )
function str.str_find( frame )
local new_args = str._getParameters( frame.args, {'source', 'target'} )
    local new_args = str._getParameters( frame.args, {'source', 'target'} );
local source_str = new_args['source'] or ''
    local source_str = new_args['source'] or '';
local target_str = new_args['target'] or ''
    local target_str = new_args['target'] or '';
 
if target_str == '' then
return 1
end
 
local start = mw.ustring.find( source_str, target_str, 1, true )
if start == nil then
start = -1
end


return start
    if target_str == '' then
        return 1;
    end   
   
    local start = mw.ustring.find( source_str, target_str, 1, true )
    if start == nil then
        start = -1
    end
   
    return start
end
end


Строка 341: Строка 339:


If invoked using named parameters, Mediawiki will automatically remove any leading or
If invoked using named parameters, Mediawiki will automatically remove any leading or
trailing whitespace from the parameter.  In some circumstances this is desirable, in
trailing whitespace from the parameter.  In some circumstances this is desirable, in  
other cases one may want to preserve the whitespace.
other cases one may want to preserve the whitespace.


This function returns the first index >= "start" where "target" can be found
This function returns the first index >= "start" where "target" can be found  
within "source".  Indices are 1-based.  If "target" is not found, then this
within "source".  Indices are 1-based.  If "target" is not found, then this  
function returns 0.  If either "source" or "target" are missing / empty, this
function returns 0.  If either "source" or "target" are missing / empty, this
function also returns 0.
function also returns 0.
Строка 352: Строка 350:
]]
]]
function str.find( frame )
function str.find( frame )
local new_args = str._getParameters( frame.args, {'source', 'target', 'start', 'plain' } )
    local new_args = str._getParameters( frame.args, {'source', 'target', 'start', 'plain' } );
local source_str = new_args['source'] or ''
    local source_str = new_args['source'] or '';
local pattern = new_args['target'] or ''
    local pattern = new_args['target'] or '';
local start_pos = tonumber(new_args['start']) or 1
    local start_pos = tonumber(new_args['start']) or 1;
local plain = new_args['plain'] or true
    local plain = new_args['plain'] or true;
 
       
if source_str == '' or pattern == '' then
    if source_str == '' or pattern == '' then
return 0
        return 0;
end
    end  
 
   
plain = str._getBoolean( plain )
    plain = str._getBoolean( plain );
 
local start = mw.ustring.find( source_str, pattern, start_pos, plain )
if start == nil then
start = 0
end


return start
    local start = mw.ustring.find( source_str, pattern, start_pos, plain )
    if start == nil then
        start = 0
    end
   
    return start
end
end


Строка 390: Строка 388:
     count: The number of occurences to replace, defaults to all.
     count: The number of occurences to replace, defaults to all.
     plain: Boolean flag indicating that pattern should be understood as plain
     plain: Boolean flag indicating that pattern should be understood as plain
         text and not as a Lua style regular expression, defaults to true
         text and not as a Lua style regular expression, defaults to true  
]]
]]
function str.replace( frame )
function str.replace( frame )
local new_args = str._getParameters( frame.args, {'source', 'pattern', 'replace', 'count', 'plain' } )
    local new_args = str._getParameters( frame.args, {'source', 'pattern', 'replace', 'count', 'plain' } );
local source_str = new_args['source'] or ''
    local source_str = new_args['source'] or '';
local pattern = new_args['pattern'] or ''
    local pattern = new_args['pattern'] or '';
local replace = new_args['replace'] or ''
    local replace = new_args['replace'] or '';
local count = tonumber( new_args['count'] )
    local count = tonumber( new_args['count'] );
local plain = new_args['plain'] or true
    local plain = new_args['plain'] or true;
       
    if source_str == '' or pattern == '' then
        return source_str;
    end   
    plain = str._getBoolean( plain );


if source_str == '' or pattern == '' then
    if plain then
return source_str
        pattern = str._escapePattern( pattern );
end
        replace = string.gsub( replace, "%%", "%%%%" ) --Only need to escape replacement sequences.
plain = str._getBoolean( plain )
    end
   
    local result;


if plain then
    if count ~= nil then
pattern = str._escapePattern( pattern )
        result = mw.ustring.gsub( source_str, pattern, replace, count );
replace = string.gsub( replace, "%%", "%%%%" ) --Only need to escape replacement sequences.
    else
end
        result = mw.ustring.gsub( source_str, pattern, replace );
    end      


local result
    return result;
end


if count ~= nil then
--[[
result = mw.ustring.gsub( source_str, pattern, replace, count )
This function adds support for escaping parts of the patterns when using [plain=false].
else
]]
result = mw.ustring.gsub( source_str, pattern, replace )
function str.escape( frame )
end
local new_args = str._getParameters( frame.args, {'pattern' } );
 
local pattern = new_args['pattern'] or '';
return result
local result = '';
result = str._escapePattern( pattern );
return result;
end
end


--[[
--[[
    simple function to pipe string.rep to templates.
  Internal compare string function
]]
]]
function str.rep( frame )
function str._strcmp(a , b)
local repetitions = tonumber( frame.args[2] )
    local s1c = mw.ustring.gcodepoint( a );
if not repetitions then
    local s2c = mw.ustring.gcodepoint( b );
return str._error( 'function rep expects a number as second parameter, received "' .. ( frame.args[2] or '' ) .. '"' )
    while true do
end
        local c1 = s1c();
return string.rep( frame.args[1] or '', repetitions )
        local c2 = s2c();
        if c1 == nil then
            if c2 == nil then
                return 0
            else
                return -1
            end
        else
            if c2 ~= nil then
                if c1 ~= c2 then
                  return c1 < c2 and -1 or 1
              end
            else
                return 1
            end
        end
    end
    return 0
end
end
 
--[[
--[[
escapePattern
compare
 
This function escapes special characters from a Lua string pattern. See [1]
for details on how patterns work.


[1] https://www.mediawiki.org/wiki/Extension:Scribunto/Lua_reference_manual#Patterns
This function compare two UTF-8 strings


Usage:
Usage:
{{#invoke:String|escapePattern|pattern_string}}
{{#invoke:String|compare|str1|str2}}


Parameters
Returns:
    pattern_string: The pattern string to escape.
0 - if strings are equal
1 - if st1 > str2
-1 - if str1 < str2
]]
]]
function str.escapePattern( frame )
function str.compare(frame)
local pattern_str = frame.args[1]
    local str1 = frame.args[1] or '';
if not pattern_str then
    local str2 = frame.args[2] or '';
return str._error( 'No pattern string specified' )
    return str._strcmp(str1 , str2)
end
local result = str._escapePattern( pattern_str )
return result
end
end


--[[
--[[  
count
    simple function to pipe string.rep to templates.
This function counts the number of occurrences of one string in another.
]]
]]
function str.count(frame)
local args = str._getParameters(frame.args, {'source', 'pattern', 'plain'})
function str.rep( frame )
local source = args.source or ''
    local repetitions = tonumber( frame.args[2] )
local pattern = args.pattern or ''
    if not repetitions then  
local plain = str._getBoolean(args.plain or true)
        return str._error( 'функция rep ожидает число  во втором параметре, а получено "' .. ( frame.args[2] or '' ) .. '"' )
if plain then
    end
pattern = str._escapePattern(pattern)
    return string.rep( frame.args[1] or '', repetitions )
end
local _, count = mw.ustring.gsub(source, pattern, '')
return count
end
 
--[[
endswith
This function determines whether a string ends with another string.
]]
function str.endswith(frame)
local args = str._getParameters(frame.args, {'source', 'pattern'})
local source = args.source or ''
local pattern = args.pattern or ''
if pattern == '' then
-- All strings end with the empty string.
return "yes"
end
if mw.ustring.sub(source, -mw.ustring.len(pattern), -1) == pattern then
return "yes"
else
return ""
end
end
 
--[[
join
 
Join all non empty arguments together; the first argument is the separator.
Usage:
{{#invoke:String|join|sep|one|two|three}}
]]
function str.join(frame)
local args = {}
local sep
for _, v in ipairs( frame.args ) do
if sep then
if v ~= '' then
table.insert(args, v)
end
else
sep = v
end
end
return table.concat( args, sep or '' )
end
end


Строка 519: Строка 497:
]]
]]
function str._getParameters( frame_args, arg_list )
function str._getParameters( frame_args, arg_list )
local new_args = {}
    local new_args = {};
local index = 1
    local index = 1;
local value
    local value;
 
   
for _, arg in ipairs( arg_list ) do
    for i,arg in ipairs( arg_list ) do
value = frame_args[arg]
        value = frame_args[arg]
if value == nil then
        if value == nil then
value = frame_args[index]
            value = frame_args[index];
index = index + 1
            index = index + 1;
end
        end
new_args[arg] = value
        new_args[arg] = value;
end
    end
 
   
return new_args
    return new_args;
end
end      


--[[
--[[
Строка 539: Строка 517:
]]
]]
function str._error( error_str )
function str._error( error_str )
local frame = mw.getCurrentFrame()
    local frame = mw.getCurrentFrame();
local error_category = frame.args.error_category or 'Errors reported by Module String'
    local error_category = frame.args.error_category or 'Страницы с ошибками модуля String';
local ignore_errors = frame.args.ignore_errors or false
    local ignore_errors = frame.args.ignore_errors or false;
local no_category = frame.args.no_category or false
    local no_category = frame.args.no_category or false;
 
   
if str._getBoolean(ignore_errors) then
    if str._getBoolean(ignore_errors) then
return ''
        return '';
end
    end
 
   
local error_str = '<strong class="error">String Module Error: ' .. error_str .. '</strong>'
    local error_str = '<strong class="error">Ошибка модуля String: ' .. error_str .. '</strong>';
if error_category ~= '' and not str._getBoolean( no_category ) then
    if error_category ~= '' and not str._getBoolean( no_category ) then
error_str = '[[Category:' .. error_category .. ']]' .. error_str
        error_str = '[[Категория:' .. error_category .. ']]' .. error_str;
end
    end      
 
   
return error_str
    return error_str;
end
end


Строка 560: Строка 538:
]]
]]
function str._getBoolean( boolean_str )
function str._getBoolean( boolean_str )
local boolean_value
    local boolean_value;
 
   
if type( boolean_str ) == 'string' then
    if type( boolean_str ) == 'string' then
boolean_str = boolean_str:lower()
        boolean_str = boolean_str:lower();
if boolean_str == 'false' or boolean_str == 'no' or boolean_str == '0'
        if boolean_str == 'false' or boolean_str == 'no' or boolean_str == '0'  
or boolean_str == '' then
                or boolean_str == '' then
boolean_value = false
            boolean_value = false;
else
        else
boolean_value = true
            boolean_value = true;
end
        end  
elseif type( boolean_str ) == 'boolean' then
    elseif type( boolean_str ) == 'boolean' then
boolean_value = boolean_str
        boolean_value = boolean_str;
else
    else
error( 'No boolean value found' )
        error( 'Логическое значение не найдено' );
end
    end  
return boolean_value
    return boolean_value
end
end


--[[
--[[
Helper function that escapes all pattern characters so that they will be treated
Helper function that escapes all pattern characters so that they will be treated  
as plain text.
as plain text.
]]
]]
function str._escapePattern( pattern_str )
function str._escapePattern( pattern_str )
return ( string.gsub( pattern_str, "[%(%)%.%%%+%-%*%?%[%^%$%]]", "%%%0" ) )
    return ( string.gsub( pattern_str, "[%(%)%.%%%+%-%*%?%[%^%$%]]", "%%%0" ) )
end
end


return str
return str
Источник — https://new-server-wiki.au.nu/index.php/Служебная:Сравнение_версий/1363...3466

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