Current File : //opt/cpanel/ea-ruby24/root/usr/share/ri/system/Range/cdesc-Range.ri
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I"JA <code>Range</code> represents an interval---a set of values with a ;TI"?beginning and an end. Ranges may be constructed using the ;TI"-<em>s</em><code>..</code><em>e</em> and ;TI"<<em>s</em><code>...</code><em>e</em> literals, or with ;TI":Range::new. Ranges constructed using <code>..</code> ;TI"Hrun from the beginning to the end inclusively. Those created using ;TI"G<code>...</code> exclude the end value. When used as an iterator, ;TI".ranges return each value in the sequence.;To: RDoc::Markup::BlankLine o:RDoc::Markup::Verbatim;[ I" (-1..-5).to_a #=> []
;TI"1(-5..-1).to_a #=> [-5, -4, -3, -2, -1]
;TI"6('a'..'e').to_a #=> ["a", "b", "c", "d", "e"]
;TI"1('a'...'e').to_a #=> ["a", "b", "c", "d"]
;T: @format0S:RDoc::Markup::Heading:
leveli: textI" Custom Objects in Ranges;T@o; ;[ I"FRanges can be constructed using any objects that can be compared ;TI"*using the <code><=></code> operator. ;TI"MMethods that treat the range as a sequence (#each and methods inherited ;TI"=from Enumerable) expect the begin object to implement a ;TI"E<code>succ</code> method to return the next object in sequence. ;TI"7The #step and #include? methods require the begin ;TI"<object to implement <code>succ</code> or to be numeric.;T@o; ;[ I"BIn the <code>Xs</code> class below both <code><=></code> and ;TI"F<code>succ</code> are implemented so <code>Xs</code> can be used ;TI"Fto construct ranges. Note that the Comparable module is included ;TI"Kso the <code>==</code> method is defined in terms of <code><=></code>.;T@o;
;[I":class Xs # represent a string of 'x's
;TI" include Comparable
;TI" attr :length
;TI" def initialize(n)
;TI" @length = n
;TI" end
;TI" def succ
;TI" Xs.new(@length + 1)
;TI" end
;TI" def <=>(other)
;TI"" @length <=> other.length
;TI" end
;TI" def to_s
;TI"+ sprintf "%2d #{inspect}", @length
;TI" end
;TI" def inspect
;TI" 'x' * @length
;TI" end
;TI" end
;T;0o; ;[I">An example of using <code>Xs</code> to construct a range:;T@o;
;[I"0r = Xs.new(3)..Xs.new(6) #=> xxx..xxxxxx
;TI"?r.to_a #=> [xxx, xxxx, xxxxx, xxxxxx]
;TI"(r.member?(Xs.new(5)) #=> true;T;0; I" range.c;T;
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first;T@W[I" hash;T@W[I"
include?;T@W[I" inspect;T@W[I" last;T@W[I"max;T@W[I" member?;T@W[I"min;T@W[I" size;T@W[I" step;T@W[I" to_json;F@`[I" to_s;T@W[;[ [;[ [ [U:RDoc::Context::Section[i 0o;;[ ; 0;
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