Method: Enumerable#take_while

Defined in:
enum.c

#take_while {|element| ... } ⇒ Array #take_while ⇒ Object

Calls the block with successive elements as long as the block returns a truthy value; returns an array of all elements up to that point:

(1..4).take_while{|i| i < 3 } # => [1, 2]
h = {foo: 0, bar: 1, baz: 2}
h.take_while{|element| key, value = *element; value < 2 }
# => [[:foo, 0], [:bar, 1]]

With no block given, returns an Enumerator.

Overloads:

  • #take_while {|element| ... } ⇒ Array

    Yields:

    • (element)

    Returns:



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# File 'enum.c', line 3613

static VALUE
enum_take_while(VALUE obj)
{
    VALUE ary;

    RETURN_ENUMERATOR(obj, 0, 0);
    ary = rb_ary_new();
    rb_block_call(obj, id_each, 0, 0, take_while_i, ary);
    return ary;
}