[SOLVED] [Ruby] Strange results when returning Enumerator from function
ProgrammingThis forum is for all programming questions.
The question does not have to be directly related to Linux and any language is fair game.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
If you use a variable the "wrong" way, Ruby will try to do what you told it to do, even to the point of transmogrifying the variable into the sort of thing that's appropriate for what you tried to do. Don't put a "right" and "wrong" example back-to-back in either order; set up the situation twice cleanly. Welcome to dynamic typecasting.
I don't get the numbers. If I'm returning "$numbers.each" from "get_enum", why does it behave differently if I change "$numbers.each" to "get_enum" in the line which has "do |x|" in it?
Calling each does something different depending on whether you pass a block or not. You're expecting the no-argument version to return a thing-which-expects-a-block (more formally, you think you've done a partial application), but actually it just returns the enumerator (i.e. it's a nop), so to actually enumerate you have to call "each" (again) with a block argument.