Module: Enumerable

Included in:
Redwood::Thread
Defined in:
lib/sup/util.rb

Instance Method Summary collapse

Instance Method Details

#argfind ⇒ Object

like find, except returns the value of the block rather than the element itself.



485
486
487
488
489
 
# File 'lib/sup/util.rb', line 485

def argfind
  ret = nil
  find { |e| ret ||= yield(e) }
  ret || nil # force
end

#argmin ⇒ Object 



491
492
493
494
495
496
497
498
499
500
 
# File 'lib/sup/util.rb', line 491

def argmin
  best, bestval = nil, nil
  each do |e|
    val = yield e
    if bestval.nil? || val < bestval
      best, bestval = e, val
    end
  end
  best
end

#between(startline, endline) ⇒ Object

returns all the entries which are equal to startline up to endline



521
522
523
 
# File 'lib/sup/util.rb', line 521

def between startline, endline
  select { |l| true if l == startline .. l == endline }
end

#map_to_hash ⇒ Object 



477
478
479
480
481
 
# File 'lib/sup/util.rb', line 477

def map_to_hash
  ret = {}
  each { |x| ret[x] = yield(x) }
  ret
end

#map_with_index ⇒ Object 



469
470
471
472
473
 
# File 'lib/sup/util.rb', line 469

def map_with_index
  ret = []
  each_with_index { |x, i| ret << yield(x, i) }
  ret
end

#max_of ⇒ Object 



516
517
518
 
# File 'lib/sup/util.rb', line 516

def max_of
  map { |e| yield e }.max
end

#shared_prefix(caseless = false, exclude = "") ⇒ Object

returns the maximum shared prefix of an array of strings optinally excluding a prefix



504
505
506
507
508
509
510
511
512
513
514
 
# File 'lib/sup/util.rb', line 504

def shared_prefix caseless=false, exclude=""
  return "" if empty?
  prefix = ""
  (0 ... first.length).each do |i|
    c = (caseless ? first.downcase : first)[i]
    break unless all? { |s| (caseless ? s.downcase : s)[i] == c }
    next if exclude[i] == c
    prefix += first[i].chr
  end
  prefix
end

#sum ⇒ Object 



475
 
# File 'lib/sup/util.rb', line 475

def sum; inject(0) { |x, y| x + y }; end