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U:RDoc::TopLevel[ i I" character_selectors.rdoc:ETcRDoc::Parser::Simpleo:RDoc::Markup::Document: @parts[%S:RDoc::Markup::Heading:
leveli: textI"Character Selectors;To: RDoc::Markup::BlankLine S; ;
i; I"Character Selector;T@
o: RDoc::Markup::Paragraph;[I"UA _character_ _selector_ is a string argument accepted by certain Ruby methods. ;TI"LEach of these instance methods accepts one or more character selectors:;T@
o:RDoc::Markup::List:
@type: BULLET: @items[o:RDoc::Markup::ListItem: @label0;[o;
;[I"=String#tr(selector, replacements): returns a new string.;To;;0;[o;
;[I"AString#tr!(selector, replacements): returns +self+ or +nil+.;To;;0;[o;
;[I"?String#tr_s(selector, replacements): returns a new string.;To;;0;[o;
;[I"CString#tr_s!(selector, replacements): returns +self+ or +nil+.;To;;0;[o;
;[I"MString#count(*selectors): returns the count of the specified characters.;To;;0;[o;
;[I"5String#delete(*selectors): returns a new string.;To;;0;[o;
;[I"9String#delete!(*selectors): returns +self+ or +nil+.;To;;0;[o;
;[I"6String#squeeze(*selectors): returns a new string.;To;;0;[o;
;[I":String#squeeze!(*selectors): returns +self+ or +nil+.;T@
o;
;[I"GA character selector identifies zero or more characters in +self+ ;TI",that are to be operands for the method.;T@
o;
;[I"JIn this section, we illustrate using method String#delete(selector), ;TI"+which deletes the selected characters.;T@
o;
;[I"EIn the simplest case, the characters selected are exactly those ;TI"&contained in the selector itself:;T@
o:RDoc::Markup::Verbatim;[ I"/'abracadabra'.delete('a') # => "brcdbr"
;TI"-'abracadabra'.delete('ab') # => "rcdr"
;TI",'abracadabra'.delete('abc') # => "rdr"
;TI"0'0123456789'.delete('258') # => "0134679"
;TI"1'!@#$%&*()_+'.delete('+&#') # => "!@$%*()_"
;TI"2'тест'.delete('т') # => "ес"
;TI"='こんにちは'.delete('に') # => "こんちは"
;T: @format0o;
;[I"3Note that order and repetitions do not matter:;T@
o;;[I",'abracadabra'.delete('dcab') # => "rr"
;TI"0'abracadabra'.delete('aaaa') # => "brcdbr"
;T;0o;
;[I"KIn a character selector, these three characters get special treatment:;T@
o;;;;[o;;0;[o;
;[I"BA leading caret ('^') functions as a "not" operator ;TI"%for the characters to its right:;T@
o;;[I",'abracadabra'.delete('^bc') # => "bcb"
;TI",'0123456789'.delete('^852') # => "258"
;T;0o;;0;[o;
;[I":A hyphen ('-') between two other characters ;TI"Kdefines a range of characters instead of a plain string of characters:;T@
o;;[I"+'abracadabra'.delete('a-d') # => "rr"
;TI"/'0123456789'.delete('4-7') # => "012389"
;TI",'!@#$%&*()_+'.delete(' -/') # => "@^_"
;TI"
;TI"(# May contain more than one range.
;TI"-'abracadabra'.delete('a-cq-t') # => "d"
;TI"
;TI"2# Ranges may be mixed with plain characters.
;TI"/'0123456789'.delete('67-950-23') # => "4"
;TI"
;TI"+# Ranges may be mixed with negations.
;TI"2'abracadabra'.delete('^a-c') # => "abacaaba"
;T;0o;;0;[o;
;[I"IA backslash ('\') acts as an escape for a caret, a hyphen, ;TI"or another backslash:;T@
o;;[
I"5'abracadabra^'.delete('\^bc') # => "araadara"
;TI"2'abracadabra-'.delete('a\-d') # => "brcbr"
;TI"9"hello\r\nworld".delete("\r") # => "hello\nworld"
;TI":"hello\r\nworld".delete("\\r") # => "hello\r\nwold"
;TI"9"hello\r\nworld".delete("\\\r") # => "hello\nworld"
;T;0S; ;
i; I"!Multiple Character Selectors;T@
o;
;[I"@These instance methods accept multiple character selectors:;T@
o;;;;[
o;;0;[o;
;[I"MString#count(*selectors): returns the count of the specified characters.;To;;0;[o;
;[I"5String#delete(*selectors): returns a new string.;To;;0;[o;
;[I"9String#delete!(*selectors): returns +self+ or +nil+.;To;;0;[o;
;[I"6String#squeeze(*selectors): returns a new string.;To;;0;[o;
;[I":String#squeeze!(*selectors): returns +self+ or +nil+.;T@
o;
;[I"FIn effect, the given selectors are formed into a single selector ;TI"Pconsisting of only those characters common to _all_ of the given selectors.;T@
o;
;[I"RAll forms of selectors may be used, including negations, ranges, and escapes.;T@
o;
;[I"7Each of these pairs of method calls is equivalent:;T@
o;;[
I" s.delete('abcde', 'dcbfg')
;TI"s.delete('bcd')
;TI"
;TI" s.delete('^abc', '^def')
;TI"s.delete('^abcdef')
;TI"
;TI" s.delete('a-e', 'c-g')
;TI"s.delete('cde');T;0:
@file@:0@omit_headings_from_table_of_contents_below0