End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
Struct#deconstruct_keys
deconstruct_keys(array_of_names) → hash
struct.c
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static VALUE
rb_struct_deconstruct_keys(VALUE s, VALUE keys)
{
VALUE h;
long i;
if (NIL_P(keys)) {
return rb_struct_to_h(s);
}
if (UNLIKELY(!RB_TYPE_P(keys, T_ARRAY))) {
rb_raise(rb_eTypeError,
"wrong argument type %"PRIsVALUE" (expected Array or nil)",
rb_obj_class(keys));
}
if (RSTRUCT_LEN(s) < RARRAY_LEN(keys)) {
return rb_hash_new_with_size(0);
}
h = rb_hash_new_with_size(RARRAY_LEN(keys));
for (i=0; i<RARRAY_LEN(keys); i++) {
VALUE key = RARRAY_AREF(keys, i);
int i = rb_struct_pos(s, &key);
if (i < 0) {
return h;
}
rb_hash_aset(h, key, RSTRUCT_GET(s, i));
}
return h;
}
Returns a hash of the name/value pairs for the given member names.
Example
Customer = Struct.new(:name, :address, :zip) joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345) h = joe.deconstruct_keys([:zip, :address]) h # => {:zip=>12345, :address=>"123 Maple, Anytown NC"}
Returns all names and values if array_of_names is nil:
Example
h = joe.deconstruct_keys(nil) h # => {:name=>"Joseph Smith, Jr.", :address=>"123 Maple, Anytown NC", :zip=>12345}