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instance method
Enumerable#drop_while
() { (E) -> ::boolish } -> ::Array[E]
() -> ::Enumerator[E, ::Array[E]]
drop_while {|element| ... } → array
drop_while → enumerator
enum.c
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static VALUE
enum_drop_while(VALUE obj)
{
VALUE result;
struct MEMO *memo;
RETURN_ENUMERATOR(obj, 0, 0);
result = rb_ary_new();
memo = rb_imemo_memo_new(result, 0, FALSE);
rb_block_call(obj, id_each, 0, 0, drop_while_i, (VALUE)memo);
return result;
}
Calls the block with successive elements as long as the block returns a truthy value; returns an array of all elements after that point:
Example
(1..4).drop_while{|i| i < 3 } # => [3, 4] h = {foo: 0, bar: 1, baz: 2} a = h.drop_while{|element| key, value = *element; value < 2 } a # => [[:baz, 2]]
With no block given, returns an Enumerator.
Example
e = (1..4).drop_while p e #=> #<Enumerator: 1..4:drop_while> i = e.next; p i; e.feed(i < 3) #=> 1 i = e.next; p i; e.feed(i < 3) #=> 2 i = e.next; p i; e.feed(i < 3) #=> 3 begin e.next rescue StopIteration p $!.result #=> [3, 4] end