[#407882] Ruby extremely slow compared to PHP — Mick Jagger <lists@...>

Hello there, how are you? Hope you are fine. I am a PHP programmer

17 messages 2013/06/02

[#407908] TCPServer/Socket and Marshal problem — Panagiotis Atmatzidis <atma@...>

Hello,

18 messages 2013/06/03

[#407946] Is rubyquiz.com dead? — Alphonse 23 <lists@...>

Thread title says everything.

18 messages 2013/06/04

[#408012] Need help understanding recursion. — pedro oliva <lists@...>

Ive been reading Chris Pine's book 'Learn to Program' and its been going

11 messages 2013/06/06

[#408129] Getting Started With Development — Chamila Wijayarathna <cdwijayarathna@...>

I'm new to Ruby Development. I downloaded source from Github, but couldn't

24 messages 2013/06/11
[#408131] Re: Getting Started With Development — Per-erik Martin <lists@...> 2013/06/11

Ruby is often installed on linux, or can be easily installed with the

[#408146] Re: Getting Started With Development — "Chamila W." <lists@...> 2013/06/11

Per-erik Martin wrote in post #1112021:

[#408149] Re: Getting Started With Development — "Carlo E. Prelz" <fluido@...> 2013/06/11

Subject: Re: Getting Started With Development

[#408198] NokoGiri XML Parser — "Devender P." <lists@...>

Hi,

11 messages 2013/06/13

[#408201] trying to load a .rb file in irb — "Eric D." <lists@...>

I am trying to load a ruby program into irb and it will not load.

12 messages 2013/06/13

[#408205] Can I use Sinatra to render dynamic pages? — Ruby Student <ruby.student@...>

Hell Team,

18 messages 2013/06/13
[#408219] Re: Can I use Sinatra to render dynamic pages? — Nicholas Van Weerdenburg <vanweerd@...> 2013/06/14

You should be able to do this without JavaScript by using streaming.

[#408228] Re: Can I use Sinatra to render dynamic pages? — Ruby Student <ruby.student@...> 2013/06/14

Well, I got some good suggestions from everyone here. I thank you all for

[#408275] Compare and sort one array according to another. — masta Blasta <lists@...>

I have two arrays of objects that look something like this:

14 messages 2013/06/17

[#408276] Comparing objects — "Thom T." <lists@...>

How do I compare two objects in Ruby, considering only attributes

15 messages 2013/06/17

[#408307] getting the most out of Ruby — robin wood <lists@...>

I write a lot of scripts in Ruby, most are small simple things but some

13 messages 2013/06/18

[#408309] Creating ruby script exe — Rochit Sen <lists@...>

Hi All,

17 messages 2013/06/18

[#408357] Beginners problem with database and datamapper — cristian cristian <lists@...>

Hi all!

28 messages 2013/06/20

[#408437] How do I input a variable floating point number into Ruby Programs — "Michael P F." <lists@...>

I want to evaluate the following interactively:

10 messages 2013/06/23

[#408518] #!/usr/bin/env: No such file or directory — Todd Sterben <lists@...>

I am new to both linux and ruby. I am using Ubuntu and Ruby 1.9

17 messages 2013/06/27

[#408528] Designing a Cabinet class — Mike Vezzani <lists@...>

Hello all,

12 messages 2013/06/27

[#408561] Find elment in array of hashes — Rodrigo Lueneberg <lists@...>

array = {:id=>1, :price =>0.25} # index[0]

23 messages 2013/06/28

Re: Load error - Std lib class Dir

From: Mike Stok <mike@...>
Date: 2013-06-22 17:05:37 UTC
List: ruby-talk #408420
On 2013-06-22, at 12:27 PM, Love U Ruby <lists@ruby-forum.com> wrote:

> Mike Stok wrote in post #1113272:
>=20
>=20
>> In the documentation in the URL you posted it says that the tmpdir =
stuff
>> is in the file tmpdir.rb, so you should try
>>=20
>> #!/usr/bin/env ruby
>>=20
>> require 'tmpdir'
>=20
> Thank you very much as always!!
>=20
> Why the line is needed - ` #!/usr/bin/env ruby` ? I have seen lots of=20=

> code having that line at top. I am not aware of that one.
>=20
> Could you help me ?

The #! line (shebang line) specifies which interpreter to use. So a =
script starting with=20

#!/usr/bin/ruby

would always use the /usr/bin/ruby interpreter to run the script.

As I use chruby to let myself switch between ruby scripts the ruby I =
want to run for my programs is pointed at by =
/Users/mike/.rbenv/shims/ruby, whose directory is on my PATH. When I =
start a script with

#!/usr/bin/env ruby

then the env program searches my PATH for the first ruby it finds and =
uses that to interpret the script. This is useful to me as it lets me =
easily switch versions in my shell and have the ruby version I'm =
interested in execute the script.

It also helps when distributing a script for use on systems where you =
don't know if ruby is /bin/ruby, /usr/local/bin/ruby, /usr/bin/ruby, or =
something else - as long as the PATH is set up correctly ruby will be =
found.

There is a downside to /usr/bin/env in that it depends on the path of =
the user running it, so the same script on a system run by two different =
users can use different interpreters. That can cause confusion when =
debugging.

Hope this helps,

Mike

>=20
> --=20
> Posted via http://www.ruby-forum.com/.

--=20

Mike Stok <mike@stok.ca>
http://www.stok.ca/~mike/

The "`Stok' disclaimers" apply.







In This Thread