End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
Struct#to_h
to_h → hash
to_h {|name, value| ... } → hash
struct.c
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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;
}
Returns a hash containing the name and value for each member:
Example
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:
Example
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.