Module: RegexpExamples
- Defined in:
- lib/regexp-examples/config.rb,
lib/regexp-examples/groups.rb,
lib/regexp-examples/parser.rb,
lib/regexp-examples/helpers.rb,
lib/regexp-examples/version.rb,
lib/regexp-examples/char_sets.rb,
lib/regexp-examples/repeaters.rb,
lib/regexp-examples/backreferences.rb,
lib/regexp-examples/chargroup_parser.rb,
lib/regexp-examples/max_results_limiter.rb,
lib/regexp-examples/unicode_char_ranges.rb,
lib/regexp-examples/parser_helpers/parse_group_helper.rb,
lib/regexp-examples/parser_helpers/parse_repeater_helper.rb,
lib/regexp-examples/parser_helpers/charset_negation_helper.rb,
lib/regexp-examples/parser_helpers/parse_multi_group_helper.rb,
lib/regexp-examples/parser_helpers/parse_after_backslash_group_helper.rb
Overview
A common helper used throughout various parser methods
Defined Under Namespace
Modules: CharsetNegationHelper, GroupWithIgnoreCase, ParseAfterBackslashGroupHelper, ParseGroupHelper, ParseMultiGroupHelper, ParseRepeaterHelper, RandomResultBySample Classes: BackReferenceGroup, BackReferenceReplacer, BaseRepeater, CharGroup, ChargroupParser, Config, DotGroup, GroupResult, MaxResultsLimiter, MaxResultsLimiterByProduct, MaxResultsLimiterBySum, MultiGroup, OneTimeRepeater, OrGroup, Parser, PlaceHolderGroup, PlusRepeater, QuestionMarkRepeater, RangeRepeater, SingleCharGroup, StarRepeater, UnicodeCharRanges
Constant Summary collapse
- IllegalSyntaxError =
Class.new(StandardError)
- VERSION =
'1.5.1'.freeze
Class Method Summary collapse
- .generic_map_result(repeaters, method) ⇒ Object
- .join_preserving_capture_groups(result) ⇒ Object
-
.permutations_of_strings(arrays_of_strings, max_results_limiter = MaxResultsLimiterByProduct.new) ⇒ Object
Given an array of arrays of strings, returns all possible perutations for strings, created by joining one element from each array.
Class Method Details
.generic_map_result(repeaters, method) ⇒ Object
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# File 'lib/regexp-examples/helpers.rb', line 36 def self.generic_map_result(repeaters, method) permutations_of_strings( repeaters.map { |repeater| repeater.public_send(method) } ) end |
.join_preserving_capture_groups(result) ⇒ Object
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# File 'lib/regexp-examples/helpers.rb', line 24 def self.join_preserving_capture_groups(result) # Only save the LAST group from repeated capture groups, because # e.g. /([ab]){2} \1/.examples should NOT include "ab a" # (Hence the need for "reverse"!) subgroups = result .flat_map(&:all_subgroups) .reverse .uniq(&:group_id) GroupResult.new(result.join, nil, subgroups) end |
.permutations_of_strings(arrays_of_strings, max_results_limiter = MaxResultsLimiterByProduct.new) ⇒ Object
Given an array of arrays of strings, returns all possible perutations for strings, created by joining one element from each array
For example: permutations_of_strings [ [‘a’], [‘b’], [‘c’, ‘d’, ‘e’] ] #=> [‘abc’, ‘abd’, ‘abe’] permutations_of_strings [ [‘a’, ‘b’], [‘c’, ‘d’] ] #=> [ ‘ac’, ‘ad’, ‘bc’, ‘bd’ ]
Edge case: permutations_of_strings [ [] ] #=> nil (For example, ths occurs during /[^dD]/.examples #=> [])
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# File 'lib/regexp-examples/helpers.rb', line 13 def self.permutations_of_strings(arrays_of_strings, max_results_limiter = MaxResultsLimiterByProduct.new) partial_result = max_results_limiter.limit_results(arrays_of_strings.shift) return partial_result if arrays_of_strings.empty? partial_result.product( permutations_of_strings(arrays_of_strings, max_results_limiter) ).map do |result| join_preserving_capture_groups(result) end end |