Method: Array#delete

Defined in:

array.c

#delete(object) ⇒ Object #delete(object) {|element| ... } ⇒ Object

Removes zero or more elements from self.

With no block given, removes from self each element ele such that ele == object; returns the last removed element:

a = [0, 1, 2, 2.0]
a.delete(2) # => 2.0
a           # => [0, 1]

Returns nil if no elements removed:

a.delete(2) # => nil

With a block given, removes from self each element ele such that ele == object.

If any such elements are found, ignores the block and returns the last removed element:

a = [0, 1, 2, 2.0]
a.delete(2) {|element| fail 'Cannot happen' } # => 2.0
a                                             # => [0, 1]

If no such element is found, returns the block’s return value:

a.delete(2) {|element| "Element #{element} not found." }
# => "Element 2 not found."

Related: see Methods for Deleting.

Overloads:

• #delete(object) {|element| ... } ⇒ Object

  Yields:

  • (element)

# File 'array.c', line 4047

VALUE
rb_ary_delete(VALUE ary, VALUE item)
{
    VALUE v = item;
    long i1, i2;

    for (i1 = i2 = 0; i1 < RARRAY_LEN(ary); i1++) {
        VALUE e = RARRAY_AREF(ary, i1);

        if (rb_equal(e, item)) {
            v = e;
            continue;
        }
        if (i1 != i2) {
            rb_ary_store(ary, i2, e);
        }
        i2++;
    }
    if (RARRAY_LEN(ary) == i2) {
        if (rb_block_given_p()) {
            return rb_yield(item);
        }
        return Qnil;
    }

    ary_resize_smaller(ary, i2);

    ary_verify(ary);
    return v;
}