Method: Range#%

Defined in:
range.c

#%(n) {|element| ... } ⇒ self #%(n) ⇒ Object

Same as #step (but doesn’t provide default value for n). The method is convenient for experssive producing of Enumerator::ArithmeticSequence.

array = [0, 1, 2, 3, 4, 5, 6]

# slice each second element:
seq = (0..) % 2 #=> ((0..).%(2))
array[seq] #=> [0, 2, 4, 6]
# or just
array[(0..) % 2] #=> [0, 2, 4, 6]

Note that due to operator precedence in Ruby, parentheses are mandatory around range in this case:

(0..7) % 2 #=> ((0..7).%(2)) -- as expected
0..7 % 2 #=> 0..1 -- parsed as 0..(7 % 2)

Overloads:

  • #%(n) {|element| ... } ⇒ self

    Yields:

    • (element)

    Returns:

    • (self) 

669
670
671
672
673
 
# File 'range.c', line 669

static VALUE
range_percent_step(VALUE range, VALUE step)
{
    return range_step(1, &step, range);
}