Method: Struct#to_h

Defined in:

struct.c

#to_h ⇒ Hash #to_h {|name, value| ... } ⇒ Hash

Returns a hash containing the name and value for each member:

Customer = Struct.new(:name, :address, :zip)
joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
h = joe.to_h
h # => {:name=>"Joe Smith", :address=>"123 Maple, Anytown NC", :zip=>12345}

If a block is given, it is called with each name/value pair; the block should return a 2-element array whose elements will become a key/value pair in the returned hash:

h = joe.to_h{|name, value| [name.upcase, value.to_s.upcase]}
h # => {:NAME=>"JOE SMITH", :ADDRESS=>"123 MAPLE, ANYTOWN NC", :ZIP=>"12345"}

Raises ArgumentError if the block returns an inappropriate value.

Overloads:

• #to_h ⇒ Hash

  Returns:

  • (Hash)
• #to_h {|name, value| ... } ⇒ Hash

  Yields:

  • (name, value)

  Returns:

  • (Hash)

# File 'struct.c', line 1055

static VALUE
rb_struct_to_h(VALUE s)
{
    VALUE h = rb_hash_new_with_size(RSTRUCT_LEN(s));
    VALUE members = rb_struct_members(s);
    long i;
    int block_given = rb_block_given_p();

    for (i=0; i<RSTRUCT_LEN(s); i++) {
        VALUE k = rb_ary_entry(members, i), v = RSTRUCT_GET(s, i);
        if (block_given)
            rb_hash_set_pair(h, rb_yield_values(2, k, v));
        else
            rb_hash_aset(h, k, v);
    }
    return h;
}