instance method

Hash#initialize_copy

(self object) -> self

replace(other_hash) -> self

static VALUE
rb_hash_replace(VALUE hash, VALUE hash2)
{
    rb_hash_modify_check(hash);
    if (hash == hash2) return hash;
    if (hash_iterating_p(hash)) {
        rb_raise(rb_eRuntimeError, "can't replace hash during iteration");
    }
    hash2 = to_hash(hash2);

    COPY_DEFAULT(hash, hash2);

    if (RHASH_AR_TABLE_P(hash)) {
        hash_ar_free_and_clear_table(hash);
    }
    else {
        hash_st_free_and_clear_table(hash);
    }

    hash_copy(hash, hash2);

    return hash;
}

Replaces the entire contents of self with the contents of other_hash; returns self:

Example

h = {foo: 0, bar: 1, baz: 2}
h.replace({bat: 3, bam: 4}) # => {bat: 3, bam: 4}

Also replaces the default value or proc of self with the default value or proc of other_hash.

Example

h = {}
other = Hash.new(:ok)
h.replace(other)
h.default # => :ok

Related: see Methods for Assigning.

See also #include? #inspect #has_value? #invert also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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