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Name	Size	Permission	Date
all%3f-i.ri	900 B	-rw-r--r--	2023-07-26 17:26
any%3f-i.ri	927 B	-rw-r--r--	2023-07-26 17:26
cdesc-Enumerable.ri	1.62 KB	-rw-r--r--	2023-07-26 17:26
chunk-i.ri	3.64 KB	-rw-r--r--	2023-07-26 17:26
collect-i.ri	722 B	-rw-r--r--	2023-07-26 17:26
collect_concat-i.ri	714 B	-rw-r--r--	2023-07-26 17:26
count-i.ri	822 B	-rw-r--r--	2023-07-26 17:26
cycle-i.ri	982 B	-rw-r--r--	2023-07-26 17:26
detect-i.ri	945 B	-rw-r--r--	2023-07-26 17:26
drop-i.ri	434 B	-rw-r--r--	2023-07-26 17:26
drop_while-i.ri	668 B	-rw-r--r--	2023-07-26 17:26
each_cons-i.ri	666 B	-rw-r--r--	2023-07-26 17:26
each_entry-i.ri	814 B	-rw-r--r--	2023-07-26 17:26
each_slice-i.ri	583 B	-rw-r--r--	2023-07-26 17:26
each_with_index-i.ri	785 B	-rw-r--r--	2023-07-26 17:26
each_with_object-i.ri	712 B	-rw-r--r--	2023-07-26 17:26
entries-i.ri	499 B	-rw-r--r--	2023-07-26 17:26
find-i.ri	941 B	-rw-r--r--	2023-07-26 17:26
find_all-i.ri	720 B	-rw-r--r--	2023-07-26 17:26
find_index-i.ri	925 B	-rw-r--r--	2023-07-26 17:26
first-i.ri	701 B	-rw-r--r--	2023-07-26 17:26
flat_map-i.ri	702 B	-rw-r--r--	2023-07-26 17:26
grep-i.ri	829 B	-rw-r--r--	2023-07-26 17:26
group_by-i.ri	633 B	-rw-r--r--	2023-07-26 17:26
include%3f-i.ri	564 B	-rw-r--r--	2023-07-26 17:26
inject-i.ri	1.97 KB	-rw-r--r--	2023-07-26 17:26
map-i.ri	714 B	-rw-r--r--	2023-07-26 17:26
max-i.ri	647 B	-rw-r--r--	2023-07-26 17:26
max_by-i.ri	572 B	-rw-r--r--	2023-07-26 17:26
member%3f-i.ri	562 B	-rw-r--r--	2023-07-26 17:26
min-i.ri	652 B	-rw-r--r--	2023-07-26 17:26
min_by-i.ri	566 B	-rw-r--r--	2023-07-26 17:26
minmax-i.ri	750 B	-rw-r--r--	2023-07-26 17:26
minmax_by-i.ri	672 B	-rw-r--r--	2023-07-26 17:26
none%3f-i.ri	917 B	-rw-r--r--	2023-07-26 17:26
one%3f-i.ri	918 B	-rw-r--r--	2023-07-26 17:26
partition-i.ri	653 B	-rw-r--r--	2023-07-26 17:26
reduce-i.ri	1.97 KB	-rw-r--r--	2023-07-26 17:26
reject-i.ri	604 B	-rw-r--r--	2023-07-26 17:26
reverse_each-i.ri	618 B	-rw-r--r--	2023-07-26 17:26
select-i.ri	716 B	-rw-r--r--	2023-07-26 17:26
slice_before-i.ri	5.1 KB	-rw-r--r--	2023-07-26 17:26
sort-i.ri	910 B	-rw-r--r--	2023-07-26 17:26
sort_by-i.ri	2.87 KB	-rw-r--r--	2023-07-26 17:26
take-i.ri	391 B	-rw-r--r--	2023-07-26 17:26
take_while-i.ri	632 B	-rw-r--r--	2023-07-26 17:26
to_a-i.ri	493 B	-rw-r--r--	2023-07-26 17:26
to_set-i.ri	320 B	-rw-r--r--	2023-07-26 17:26
zip-i.ri	1.09 KB	-rw-r--r--	2023-07-26 17:26

Rename

U:RDoc::AnyMethod[iI"slice_before:ETI"Enumerable#slice_before;TF:publico:RDoc::Markup::Document:@parts[o:RDoc::Markup::Verbatim;	[&I"6Creates an enumerator for each chunked elements.
;FI"FThe beginnings of chunks are defined by _pattern_ and the block.
;FI",If _pattern_ === _elt_ returns true or
;FI"-the block returns true for the element,
;FI"*the element is beginning of a chunk.
;FI"
;FI"LThe === and block is called from the first element to the last element
;FI"of _enum_.
;FI"2The result for the first element is ignored.
;FI"
;FI"NThe result enumerator yields the chunked elements as an array for +each+
;FI"
method.
;FI"-+each+ method can be called as follows.
;FI"
;FI"4  enum.slice_before(pattern).each {|ary| ... }
;FI"9  enum.slice_before {|elt| bool }.each {|ary| ... }
;FI"O  enum.slice_before(initial_state) {|elt, state| bool }.each {|ary| ... }
;FI"
;FI">Other methods of Enumerator class and Enumerable module,
;FI")such as map, etc., are also usable.
;FI"
;FI"IFor example, iteration over ChangeLog entries can be implemented as
;FI"follows.
;FI"
;FI")  # iterate over ChangeLog entries.
;FI"  open("ChangeLog") {|f|
;FI"0    f.slice_before(/\A\S/).each {|e| pp e}
;FI"	  }
;FI"
;FI"D  # same as above.  block is used instead of pattern argument.
;FI"  open("ChangeLog") {|f|
;FI"B    f.slice_before {|line| /\A\S/ === line }.each {|e| pp e}
;FI"	  }
;Fo:RDoc::Markup::Paragraph;	[I"?"svn proplist -R" produces multiline output for each file.;TI"$They can be chunked as follows:;To:RDoc::Markup::BlankLine�o;
;	[BI"A  IO.popen([{"LC_ALL"=>"C"}, "svn", "proplist", "-R"]) {|f|
;FI"@    f.lines.slice_before(/\AProp/).each {|lines| p lines }
;FI"	  }
;FI"G  #=> ["Properties on '.':\n", "  svn:ignore\n", "  svk:merge\n"]
;FI"@  #   ["Properties on 'goruby.c':\n", "  svn:eol-style\n"]
;FI"V  #   ["Properties on 'complex.c':\n", "  svn:mime-type\n", "  svn:eol-style\n"]
;FI"B  #   ["Properties on 'regparse.c':\n", "  svn:eol-style\n"]
;FI"  #   ...
;FI"
;FI"BIf the block needs to maintain state over multiple elements,
;FI""local variables can be used.
;FI"OFor example, three or more consecutive increasing numbers can be squashed
;FI"as follows:
;FI"
;FI"  a = [0,2,3,4,6,7,9]
;FI"  prev = a[0]
;FI"  p a.slice_before {|e|
;FI"    prev, prev2 = e, prev
;FI"    prev2 + 1 != e
;FI"  }.map {|es|
;FI"B    es.length <= 2 ? es.join(",") : "#{es.first}-#{es.last}"
;FI"  }.join(",")
;FI"  #=> "0,2-4,6,7,9"
;FI"
;FI"CHowever local variables are not appropriate to maintain state
;FI"5if the result enumerator is used twice or more.
;FI"KIn such case, the last state of the 1st +each+ is used in 2nd +each+.
;FI"A_initial_state_ argument can be used to avoid this problem.
;FI"3If non-nil value is given as _initial_state_,
;FI"Kit is duplicated for each "each" method invocation of the enumerator.
;FI"FThe duplicated object is passed to 2nd argument of the block for
;FI"+slice_before+ method.
;FI"
;FI"  # word wrapping.
;FI"6  # this assumes all characters have same width.
;FI"%  def wordwrap(words, maxwidth)
;FI"Q    # if cols is a local variable, 2nd "each" may start with non-zero cols.
;FI"-    words.slice_before(cols: 0) {|w, h|
;FI"*      h[:cols] += 1 if h[:cols] != 0
;FI"       h[:cols] += w.length
;FI""      if maxwidth < h[:cols]
;FI"!        h[:cols] = w.length
;FI"        true
;FI"      else
;FI"        false
;FI"      end
;FI"    }
;FI"  end
;FI"%  text = (1..20).to_a.join(" ")
;FI".  enum = wordwrap(text.split(/\s+/), 10)
;FI"  puts "-"*10
;FI"+  enum.each {|ws| puts ws.join(" ") }
;FI"  puts "-"*10
;FI"  #=> ----------
;FI"  #   1 2 3 4 5
;FI"  #   6 7 8 9 10
;FI"  #   11 12 13
;FI"  #   14 15 16
;FI"  #   17 18 19
;FI"  #   20
;FI"  #   ----------
;Fo;;	[I"Cmbox contains series of mails which start with Unix From line.;TI"BSo each mail can be extracted by slice before Unix From line.;T@2o;
;	[!I"# parse mbox
;FI"open("mbox") {|f|
;FI"  f.slice_before {|line|
;FI""    line.start_with? "From "
;FI"  }.each {|mail|
;FI"     unix_from = mail.shift
;FI"    i = mail.index("\n")
;FI"    header = mail[0...i]
;FI"     body = mail[(i+1)..-1]
;FI"'    body.pop if body.last == "\n"
;FI"N    fields = header.slice_before {|line| !" \t".include?(line[0]) }.to_a
;FI"    p unix_from
;FI"    pp fields
;FI"    pp body
;FI"	  }
;FI"}
;FI"
;FI"M# split mails in mbox (slice before Unix From line after an empty line)
;FI"open("mbox") {|f|
;FI"+  f.slice_before(emp: true) {|line,h|
;FI"    prevemp = h[:emp]
;FI"     h[:emp] = line == "\n"
;FI".    prevemp && line.start_with?("From ")
;FI"  }.each {|mail|
;FI"'    mail.pop if mail.last == "\n"
;FI"    pp mail
;FI"	  }
;FI"};F:
@file0I"�enum.slice_before(pattern)                            -> an_enumerator
enum.slice_before {|elt| bool }                       -> an_enumerator
enum.slice_before(initial_state) {|elt, state| bool } -> an_enumerator
 ;T0[�I"(p1 = v1);FI"enum.c;T