class Array
Public Instance Methods
chunks( number_of_chunks )
click to toggle source
# File lib/textutils/core_ext/array.rb, line 19 def chunks( number_of_chunks ) ## NB: use chunks - columns might be in use by ActiveRecord! ### # e.g. # [1,2,3,4,5,6,7,8,9,10].columns(3) # becomes: # [[1,4,7,10], # [2,5,8], # [3,6,9]] ## check/todo: make a copy of the array first?? # for now reference to original items get added to columns chunks = (1..number_of_chunks).collect { [] } each_with_index do |item,index| chunks[ index % number_of_chunks ] << item end chunks end
in_columns( cols )
click to toggle source
todo: check if there's already a builtin method for this
note:
in rails ary.in_groups(3) results in top-to-bottom, left-to-right.
and not left-to-right first and than top-to-bottom.
rename to in_groups_vertical(3) ???
# File lib/textutils/core_ext/array.rb, line 15 def in_columns( cols ) # alias for convenience for chunks - needed? why? why not? chunks( cols ) end