swapcase()
public
Returns a copy of str with uppercase alphabetic characters
converted to lowercase and lowercase characters converted to uppercase.
Note: case conversion is effective only in ASCII region.
"Hello".swapcase
"cYbEr_PuNk11".swapcase
Show source
static VALUE
rb_str_swapcase(VALUE str)
{
str = rb_str_dup(str);
rb_str_swapcase_bang(str);
return str;
}