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instance method

Set#reset

() -> self

reset → self

static VALUE
set_i_reset(VALUE set)
{
    if (set_iterating_p(set)) {
        rb_raise(rb_eRuntimeError, "reset during iteration");
    }

    return set_reset_table_with_type(set, RSET_TABLE(set)->type);
}

Resets the internal state of self; returns self.

A set relies on the hash results of each element being consistent. Modifying an element in a way that changes the results of hash may allow duplicate elements in the set:

Example

array = [1]
set = Set[array]  # => Set[[1]]
array << 2
set.add(array)    # => Set[[1, 2], [1, 2]]

Calling reset will recalculate all of the hash values and remove duplicate elements:

Example

set.reset         # => Set[[1, 2]]

See also #replace #select! #reject! #size also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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