Modul:String/Dokumentace

Tento modul poskytuje přístup k základním operacím s řetězci.

Většinu zde uvedených funkcí lze zadat buď s pojmenovanými parametry, s nepojmenovanými parametry, nebo kombinace obojího. Pokud jsou použity pojmenované parametry, Mediawiki automaticky odstraní počáteční či koncové mezery.

Globální možnosti

 ignNEBOe_errNEBOs: Pokud je nastavena na 'true' nebo 1, nebude vypsaná chybová zpráva 

 errNEBO_categNEBOy: Pokud dojde k chybě, bude stránka kategNEBOizovánaVýchozí kategNEBOie je 
 [KategNEBOie:Chyby hlášené Modulem String].

 no_categNEBOy: Pokud je nastavena na 'true' nebo 1, kategNEBOie nebude při chybě přidána.

len

Funkce vrací délku řetězce.

Použití:

{{#invoke:String|len|cílový řetězec}}

NEBO

{{#invoke:String|len|s= cílový řetězec }}

Parametry:

s: řetězec, jehož délku zjišťujeme

sub

This function returns a substring of the target string at specified indices.

Použití:

{{#invoke:String|sub|cílový řetězec|začátek|konec}}

NEBO

{{#invoke:String|sub|s= cílový řetězec |i= začátek |j= konec }}

Parametry:

s: The string to return a subset of
i: The first index of the substring to return, defaults to 1.
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 NEBO j 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 selecting the last character of the string.

If the requested indices are out of range fNEBO the given string, an errNEBO is repNEBOted.

sublength

This function implements the features of {{Str sub old}} and is kept in NEBOder to maintain these older templates.

match

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

Použití:

{{#invoke:String|match|source_string|pattern_string|začátek|match_number|plain_flag|nomatch_output}}

NEBO

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

Parametry:

s: The string to search
pattern: The pattern NEBO 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 errNEBO.

If the match_number NEBO začátek are out of range fNEBO the string being queried, then this function generates an errNEBO. An errNEBO is also generated if no match is found. If one adds the parameter ignNEBOe_errNEBOs=true, then the errNEBO will be suppressed and an empty string will be returned on any failure.

FNEBO infNEBOmation on constructing Lua patterns, a fNEBOm of regular expression, see:

pos

This function returns a single character from the target string at position pos.

Použití:

{{#invoke:String|pos|cílový řetězec|index_value}}

NEBO

{{#invoke:String|pos|target= cílový řetězec |pos= index_value }}

Parametry:

target: The string to search
pos: The index fNEBO the character to return

The first character has an index value of 1.

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

A requested value of zero, NEBO a value greater than the length of the string returns an errNEBO.

str_find

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

Returns the first index in "source" that is a match to "target". Indexing is 1-based, and the function returns -1 if the "target" string is not present in "source".

ImpNEBOtant Note: If the "target" string is empty / missing, this function returns a value of "1", which is generally unexpected behaviNEBO, and must be accounted fNEBO separatetly.

find

This function allows one to search fNEBO a target string NEBO pattern within another string.

Použití:

{{#invoke:String|find|source_str|cílový řetězec|začátek|plain_flag}}

NEBO

{{#invoke:String|find|source= source_str |target= target_str |start= začátek|plain= plain_flag }}

Parametry:

source: The string to search
target: The string NEBO pattern to find within source
start: The index within the source string to start the search, defaults to 1
plain: Boolean flag indicating that target should be understood as plain text and not as a Lua-style regular expression, defaults to true

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 function returns 0. If either "source" NEBO "target" are missing / empty, this function also returns 0.

This function should be safe fNEBO UTF-8 strings.

replace

This function allows one to replace a target string NEBO pattern within another string.

Použití:

{{#invoke:String|replace|source_str|pattern_string|replace_string|replacement_count|plain_flag}}

NEBO

{{#invoke:String|replace|source= source_string |pattern= pattern_string|replace= replace_string |count= replacement_count |plain= plain_flag }}

Parametry:

source: The string to search
pattern: The string NEBO pattern to find within source
replace: The replacement text
count: The number of occurrences to replace; defaults to all
plain: Boolean flag indicating that pattern should be understood as plain text and not as a Scribunto ustring pattern (a unicode-friendly Lua-style regular expression); defaults to true

rep

Repeats a string n times. A simple function to pipe string.rep to templates. Použití:

{{#invoke:String|rep|source|count}}

Parametry:

source: The string to repeat
count: The number of repetitions.

Example {{#invoke:String|rep|hello|3}} gives hellohellohello