dup – Tarik Billa

practical examples use dup or dup2

February 24, 2023 by Tarik

One example use would be I/O redirection. For this you fork a child process and close the stdin or stdout file descriptors (0 and 1) and then you do a dup() on another filedescriptor of your choice which will now be mapped to the lowest available file descriptor, which is in this case 0 or … Read more

What’s the difference between Ruby’s dup and clone methods?

October 9, 2022 by Tarik

Subclasses may override these methods to provide different semantics. In Object itself, there are two key differences. First, clone copies the singleton class, while dup does not. o = Object.new def o.foo 42 end o.dup.foo # raises NoMethodError o.clone.foo # returns 42 Second, clone preserves the frozen state, while dup does not. class Foo attr_accessor … Read more