In answer to your original question: “Is it safe to delete the /proc/kcore file? Or is there a solution on getting it to an normal size.” No, it’s not safe. Well, I wouldn’t like to bet what would happen if you deleted it anyway! The /proc directory is the mount point for procfs (run mount … Read more
Some methods take a block, and this pattern frequently appears for a block: {|x| x.foo} and people would like to write that in a more concise way. In order to do that they use a combination of: a symbol, the method Symbol#to_proc, implicit class casting, and & operator. If you put & in front of … Read more
Fibers are something you will probably never use directly in application-level code. They are a flow-control primitive which you can use to build other abstractions, which you then use in higher-level code. Probably the #1 use of fibers in Ruby is to implement Enumerators, which are a core Ruby class in Ruby 1.9. These are … Read more
Another important but subtle difference between procs created with lambda and procs created with Proc.new is how they handle the return statement: In a lambda-created proc, the return statement returns only from the proc itself In a Proc.new-created proc, the return statement is a little more surprising: it returns control not just from the proc, … Read more