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| -rw-r--r-- | enumerator.c | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/enumerator.c b/enumerator.c index a8bc787874..bdf862789e 100644 --- a/enumerator.c +++ b/enumerator.c @@ -316,63 +316,6 @@ enumerator_init(VALUE enum_obj, VALUE obj, VALUE meth, int argc, VALUE *argv, VA * in a lazy fashion (see Enumerable#size). It can either be a value or * a callable object. * - * The block form can be used to create a lazy enumeration that only processes - * elements as-needed. The generic pattern for this is: - * - * Enumerator.new do |yielder| - * source.each do |source_item| - * # process source_item and append the yielder - * end - * end - * - * This can be used with infinite streams to support multiple chains: - * - * class Fib - * def initialize(a = 1, b = 1) - * @a, @b = a, b - * end - * - * def each - * a, b = @a, @b - * yield a - * while true - * yield b - * a, b = b, a+b - * end - * end - * end - * - * def lazy_select enum - * Enumerator.new do |y| - * enum.each do |e| - * y << e if yield e - * end - * end - * end - * - * def lazy_map enum - * Enumerator.new do |y| - * enum.each do |e| - * y << yield(e) - * end - * end - * end - * - * even_fibs = lazy_select(Fibs.new) { |x| x % 2 == 0 } - * string_fibs = lazy_map(even_fibs) { |x| "<#{x}>" } - * string_fibs.each_with_index do |fib, i| - * puts "#{i}: #{fib}" - * break if i >= 3 - * end - * - * This allows output even though the Fib produces an infinite sequence of - * Fibonacci numbers: - * - * 0: <2> - * 1: <8> - * 2: <34> - * 3: <144> - * * In the second, deprecated, form, a generated Enumerator iterates over the * given object using the given method with the given arguments passed. * |