imported>Ssola: ←Created page with 'local p = {} --[[ Split This function Splits a string based on a pattern, returns nth substring based on count. Usage: {{#invoke:StringFunc|split|source_strin...'

2016-01-30T18:32:35Z

←Created page with 'local p = {} --[[ Split This function Splits a string based on a pattern, returns nth substring based on count. Usage: {{#invoke:StringFunc|split|source_strin...'

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local p = {}

--[[
Split

This function Splits a string based on a pattern, returns nth substring based on count.

Usage:
{{#invoke:StringFunc|split|source_string|pattern|count|plain}}

Parameters:
source: The string to return a subset of
pattern: The pattern or string to split on
count: The nth substring based on the pattern to return
plain: A flag indicating if the pattern should be understood as plain text, defaults to true.
]]
function p.split( frame )
local new_args = p._getParameters( frame.args, {'source', 'pattern', 'count', 'plain'} )
local source_str = new_args['source'] or '';
local pattern = new_args['pattern'] or '';
if source_str == '' or pattern == '' then
return source_str;
end
local l_plain = p._getBoolean( new_args['plain'] or true );
if l_plain then
pattern = p._escapePattern( pattern );
end
local plain = false;
pattern = "[" .. pattern .. "]"
local ret_count = tonumber( new_args['count'] ) or 1;
local start = 1;
local iter = mw.ustring.find(source_str, pattern, start, plain);
if iter == nil then
return source_str;
end
if ret_count == 1 then
return mw.ustring.sub( source_str, start, iter);
end
for i=2, ret_count do
start = iter+1;
iter = mw.ustring.find(source_str, pattern, start, plain);
if iter == nil then
break
end
end
return mw.ustring.sub( source_str,start,iter);
end

-- Argument list helper function, as per Module:String
function p._getParameters( frame_args, arg_list)
local new_args = {};
local index = 1;
local value;
for i, arg in ipairs( arg_list ) do
value = frame_args[arg]
if value == nil then
value = frame_args[index];
index = index + 1;
end
new_args[arg] = value;
end
return new_args;
end

-- Escape Pattern helper function so that all charecters are treated as plain text, as per Module:String
function p._escapePattern( pattern_str)
return mw.ustring.gsub( pattern_str, "([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" );
end

-- Helper Function to interpret boolean strings, as per Module:String
function p._getBoolean( boolean_str )
local boolean_value;

if type( boolean_str ) == 'string' then
boolean_str = boolean_str:lower();
if boolean_str == 'false' or boolean_str == 'no' or boolean_str == 'O' or boolean_str == '' then
boolean_value = false;
else
boolean_value = true;
end
elseif type(boolean_str) == 'boolean' then
boolean_value = boolean_str;
else
error( 'No boolean value found' );
end
return boolean_value
end

return p

Module:Sandbox/User:Ssola - Revision history

imported>Ssola: ←Created page with 'local p = {} --[[ Split This function Splits a string based on a pattern, returns nth substring based on count. Usage: {{#invoke:StringFunc|split|source_strin...'