[#399938] how to read arrary with an array — "Richard D." <lists@...>

Hello. I believe this is basic question, but I'm just starting to learn

19 messages 2012/10/02

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[#400351] Drop 1st and last particular character — ajay paswan <lists@...>

What is the most efficient way to drop '#' from the first place and last

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[#400374] database part of a desktop application — "Sebastjan H." <lists@...>

Hi,

14 messages 2012/10/16
[#400375] Re: database part of a desktop application — Chad Perrin <code@...> 2012/10/16

On Wed, Oct 17, 2012 at 05:28:39AM +0900, Sebastjan H. wrote:

[#400377] Re: database part of a desktop application — sto.mar@... 2012/10/17

Am 16.10.2012 23:24, schrieb Chad Perrin:

[#400389] Re: database part of a desktop application — Chad Perrin <code@...> 2012/10/17

On Wed, Oct 17, 2012 at 01:39:21PM +0900, sto.mar@web.de wrote:

[#400386] Unable to send attachment, and dealing with multiple attachment — ajay paswan <lists@...>

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11 messages 2012/10/17

[#400454] Hash with Integer key issue — Wayne Simmerson <lists@...>

Hi Im new to Ruby and am getting some unexpected results from a

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[#400535] Name/symbol/object type clash? What is happening here? — Todd Benson <caduceass@...>

It's nonsense code, but I'm curious as to what is going on behind the scenes...

41 messages 2012/10/23

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[#400680] Passing folder as argument ARGV? — Joz Private <lists@...>

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15 messages 2012/10/28
[#400681] Re: Passing folder as argument ARGV? — brad smith <bradleydsmith@...> 2012/10/28

How are you traversing the directory you pass in on the command line ?

[#400697] File.readable? and /proc — Jeff Moore <lists@...>

root@nail:/projects/proc_fs# uname -a

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12 messages 2012/10/28

[#400781] bug?: local variable created in if modifier not available in modified expression — "Mean L." <lists@...>

irb(main):001:0> local1 if local1 = "created"

21 messages 2012/10/30
[#400807] Re: bug?: local variable created in if modifier not available in modified expression — Bartosz Dziewoński <matma.rex@...> 2012/10/31

Oh, and in case it wasn't apparent: you can just add

[#400808] Re: bug?: local variable created in if modifier not available in modified expression — Eliezer Croitoru <eliezer@...> 2012/10/31

On 10/31/2012 4:52 PM, Bartosz Dziewoナгki wrote:

[#400809] Re: bug?: local variable created in if modifier not available in modified expression — Robert Klemme <shortcutter@...> 2012/10/31

On Wed, Oct 31, 2012 at 4:28 PM, Eliezer Croitoru <eliezer@ngtech.co.il>wrote:

[#400784] REXML & HTMLentities incorrectly map to UTF-8 — "Mark S." <lists@...>

I have some XML data (UTF 8) that I'm trying to convert into another XML

13 messages 2012/10/30

Re: how to read arrary with an array

From: sto.mar@...
Date: 2012-10-02 19:34:52 UTC
List: ruby-talk #399977
Am 02.10.2012 20:44, schrieb Richard D.:
> array1.each do |ray| #four outputs of a, b1, 2x, y
>    puts ray[0]
>    puts '****'
>    puts ray[1]
> end
>
> I was assuming I would get the same outcome.

Well, that's wrong. You did not understand how Array#each works.

Each array element is passed to the variable `ray` and then
the **complete** block is evaluated for that single element,
then the next element is passed to ray etc.
Array#each does *not* evaluate each line for all array elements
and then go to the next line.

> It should be noted, I'm not far enough in the book to have blocks
> explained, so are this point, in how it used, it's more a way to turn a
> method output into a variable, with will  do something later.

No, you misunderstood what the author is saying.
But at the moment you do not have to understand more about blocks
than that they here behave similar to the block of a while loop.

Array#each is explained *in detail* in chapter 8.1, please reread.

> On a side note, I have not a clue of what slice is or what it does or
> does not do.

I just wanted to point out that an array that contains an array is not a 
2x2 matrix with rows and columns, and also can contain objects that
do not even have an element reference (so that object[3] is not
possible and gives a syntax error).


-- 
<https://github.com/stomar/>

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