Module:String/doc/cs

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{{Shared Template Warning|Module:String}} {{Module rating|release}} {{Module rating|protected}} Tento modul je určen k poskytování přístupu k základním funkcím řetězců.

Většinu zde poskytovaných funkcí lze vyvolat s pojmenovanými parametry, nepojmenovanými parametry nebo kombinací. Pokud jsou použity pojmenované parametry, MediaWiki z parametru automaticky odstraní všechny úvodní nebo koncové mezery. V závislosti na zamýšleném použití může být výhodné takové mezery buď zachovat nebo odstranit.



Celosvětové možnosti

 * Pokud je nastaveno na nebo 1, jakýkoli chybový stav bude mít za následek vrácený prázdný řetězec, nikoli chybovou zprávu.
 * Pokud je nastaveno na nebo 1, jakýkoli chybový stav bude mít za následek vrácený prázdný řetězec, nikoli chybovou zprávu.


 * Pokud dojde k chybě, určuje název kategorie, která má být zahrnuta do chybové zprávy. Výchozí kategorie je.
 * Pokud dojde k chybě, určuje název kategorie, která má být zahrnuta do chybové zprávy. Výchozí kategorie je.


 * Pokud je nastaveno na nebo 1, pokud dojde k chybě, nebude přidána žádná kategorie.
 * Pokud je nastaveno na nebo 1, pokud dojde k chybě, nebude přidána žádná kategorie.

Celkové testy pro tento modul jsou k dispozici na Module:String/testcases.

Tato funkce vrací délku cílového řetězce.

Použitíː



nebo



Parametry:


 * Řetězec, jehož délka se má hlásit
 * Řetězec, jehož délka se má hlásit


 * Tato funkce vrací podřetězec cílového řetězce se zadanými indexy.

Použitíː



nebo



Parametry:


 * The string to return a subset of
 * The string to return a subset of


 * The first index of the substring to return, defaults to 1.
 * The first index of the substring to return, defaults to 1.


 * The last index of the string to return, defaults to the last character.
 * 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 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 for the given string, an error is reported.

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

Usage:



OR



Parameters:


 * The string to search
 * The string to search


 * The pattern or string to find within the string
 * The pattern or string to find within the string


 * The index within the source string to start the search. The first character of the string has index 1. Defaults to 1.
 * The index within the source string to start the search. The first character of the string has index 1. Defaults to 1.


 * 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 . If a negative number is specified then a match is returned counting from the last match. Hence   is the same as requesting the last match. Defaults to 1.
 * 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 . If a negative number is specified then a match is returned counting from the last match. Hence   is the same as requesting the last match. Defaults to 1.


 * Boolean flag indicating that pattern should be understood as plain text and not as a Lua-style regular expression. Defaults to.
 * Boolean flag indicating that pattern should be understood as plain text and not as a Lua-style regular expression. Defaults to.


 * If no match is found, output the "nomatch" value rather than an error.
 * If no match is found, output the "nomatch" value rather than an error.

If the  or   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. If one adds the parameter, then the error will be suppressed and an empty string will be returned on any failure.

For information on constructing Lua patterns, a form of regular expression, see:


 * Lua reference: Patterns - as of version 5.1

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

Usage:



OR



Parameters:


 * The string to search
 * The string to search


 * The index for the character to return
 * The index for 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 words  is the same as asking for the last character.

A requested value of zero, or a value greater than the length of the string returns an error.

This function allows one to search for a target string or pattern within another string.

Usage:



OR



Parameters:


 * The string to search
 * The string to search


 * The string or pattern to find within source
 * The string or pattern to find within source


 * The index within the source string to start the search, defaults to 1
 * The index within the source string to start the search, defaults to 1


 * Boolean flag indicating that target should be understood as plain text and not as a Lua-style regular expression, defaults to
 * Boolean flag indicating that target should be understood as plain text and not as a Lua-style regular expression, defaults to

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" or "target" are missing / empty, this function also returns 0.

This function should be safe for UTF-8 strings.

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

Usage:



OR



Parameters:


 * The string to search
 * The string to search


 * The string or pattern to find within source
 * The string or pattern to find within source


 * The replacement text
 * The replacement text


 * The number of occurrences to replace; defaults to all
 * The number of occurrences to replace; defaults to all


 * 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
 * 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

Repeats a string n times.

Usage:



Parameters:


 * The string to repeat
 * The string to repeat


 * The number of repetitions.
 * The number of repetitions.

Example gives

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