Module:String: Difference between revisions
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(adds updated match support with wider parameter choices, whitespace handling, etc.) |
(add nomatch option to str.match) |
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Usage: |
Usage: |
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{{#invoke:String|match|source_string|pattern_string|start_index|match_number|plain_flag}} |
{{#invoke:String|match|source_string|pattern_string|start_index|match_number|plain_flag|nomatch_output}} |
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OR |
OR |
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{{#invoke:String|pos|s=source_string|pattern=pattern_string|start=start_index |
{{#invoke:String|pos|s=source_string|pattern=pattern_string|start=start_index |
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|match=match_number|plain=plain_flag}} |
|match=match_number|plain=plain_flag|nomatch=nomatch_output}} |
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Parameters |
Parameters |
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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 |
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the last match. Defaults to 1. |
the last match. Defaults to 1. |
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plain: A flag indicating that the pattern should be understood as plain |
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text. Defaults to false. |
text. Defaults to false. |
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nomatch: If no match is found, output the "nomatch" value rather than an error. |
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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 |
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]] |
]] |
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function str.match( frame ) |
function str.match( frame ) |
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local new_args = str._getParameters( frame.args, {'s', 'pattern', 'start', 'match', 'plain'} ); |
local new_args = str._getParameters( frame.args, {'s', 'pattern', 'start', 'match', 'plain', 'nomatch'} ); |
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local s = new_args['s'] or ''; |
local s = new_args['s'] or ''; |
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local start = tonumber( new_args['start'] ) or 1; |
local start = tonumber( new_args['start'] ) or 1; |
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local pattern = new_args['pattern'] or ''; |
local pattern = new_args['pattern'] or ''; |
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local match_index = math.floor( tonumber(new_args['match']) or 1 ); |
local match_index = math.floor( tonumber(new_args['match']) or 1 ); |
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local nomatch = new_args['nomatch']; |
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if s == '' then |
if s == '' then |
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if result == nil then |
if result == nil then |
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if nomatch == nil then |
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return str._error( 'Match not found' ); |
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else |
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return nomatch; |
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end |
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else |
else |
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return result; |
return result; |
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