Remove ends of array and interleave

ruby-talk
1

Greetings:

I have some problems getting a couple of elements working right... I
have 2 small issues:

1. Trying to remove the first and last element in an array in Ruby:
def remove_ends(a)
a.pop
a.shift
end

I need out put like:
Input array: [1,2,3,4]
Output: [2,3]

This seems like I'm stumbling on how to reference the array that is
being processed rather than the original??

2. I'm trying to interleave 2 arrays. I've seen some examples online but
I need to keep the arguments (a,b) and other examples don't have 2
inputs.
I'm pretty close:

a.zip(b)
join

It interleaves just fine.. but I need the output to be 1 string:
"a1b2c3d4" I'm not sure how to get to the array created to use JOIN.

Thanks

Attachments:
http://www.ruby-forum.com/attachment/6839/valkyriecode.txt

···

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Posted via http://www.ruby-forum.com/.

2

Greetings:

I have some problems getting a couple of elements working right... I
have 2 small issues:

1. Trying to remove the first and last element in an array in Ruby:
def remove_ends(a)
a.pop
a.shift
end

I need out put like:
Input array: [1,2,3,4]
Output: [2,3]

This seems like I'm stumbling on how to reference the array that is
being processed rather than the original??

What exactly is your problem?

2. I'm trying to interleave 2 arrays. I've seen some examples online but
I need to keep the arguments (a,b) and other examples don't have 2
inputs.
I'm pretty close:

a.zip(b)
join

It interleaves just fine.. but I need the output to be 1 string:
"a1b2c3d4" I'm not sure how to get to the array created to use JOIN.

What's wrong with a.zip(b).join ?

Cheers

rober

···

On Wed, Dec 14, 2011 at 3:42 AM, matha wasint <sherri@vsoundinc.com> wrote:

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

3

1. Trying to remove the first and last element in an array in Ruby:
def remove_ends(a)
a.pop
a.shift
end

Is your problem, that a gets altered?
If so, try
def remove_ends(a)
  a[1..-2]
end

2. I'm trying to interleave 2 arrays. I've seen some examples online but

a = [1,2,3]
b = ['a','b','c']

a.zip(b).join # => "1a2b3c"