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instance method

Set#delete?

(A) -> self?

delete?(object) → self or nil

static VALUE
set_i_delete_p(VALUE set, VALUE item)
{
    st_data_t item_data = (st_data_t)item;
    rb_check_frozen(set);
    if (set_table_delete(RSET_TABLE(set), &item_data)) {
        set_compact_after_delete(set);
        return set;
    }
    return Qnil;
}

Like delete, but returns nil if the object is not in self:

Example

set = Set[0, 'zero', :zero]
set.delete?(0) # => Set["zero", :zero]
set.delete?(0) # => nil

Related: see Methods for Deleting.

See also #delete #delete_if #compare_by_identity? #difference also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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