A population of 20 cows, each one has age and weight (known).
Device this population into 2 group, each group has 10 cows.

Questions:
How to pick a cow on each group so that a distribution of AGE and
WEIGHT on each group is similar. Show your strategy or/and implement
it in PERL.

Thanks


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On Tue, 19 Apr 2011 16:29:16 -0700, ai nguyen wrote:

> A population of 20 cows, each one has age and weight (known). Device
> this population into 2 group, each group has 10 cows.
>
> Questions:
> How to pick a cow on each group so that a distribution of AGE and WEIGH=
T
> on each group is similar. Show your strategy or/and implement it in
> PERL.

Is this a question on a quiz or test you're taking? Do the people giving=

the test have the expectation that your answer is a measure of your
abilities or those of people you've asked for help?

How far have you gotten with a solution?

Or if you're just posing a question as a challenge for people to exercise=

their brains, this would be better off in the Perl Quiz-of-the-Week list
(which hasn't seen any traffic in aeons).

--
Peter Scott
http://www.perlmedic.com/ http://www.perldebugged.com/
http://www.informit.com/store/product.aspx?isbn=3D0137001274
http://www.oreillyschool.com/courses/perl3/

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From: Peter Scott <Peter [at] PSDT.com>
> On Tue, 19 Apr 2011 16:29:16 -0700, ai nguyen wrote:
>
> > A population of 20 cows, each one has age and weight (known). Device
> > this population into 2 group, each group has 10 cows.
> >
> > Questions:
> > How to pick a cow on each group so that a distribution of AGE and WEIGHT
> > on each group is similar. Show your strategy or/and implement it in
> > PERL.
>
> Is this a question on a quiz or test you're taking? Do the people giving
> the test have the expectation that your answer is a measure of your
> abilities or those of people you've asked for help?
>
> How far have you gotten with a solution?
>
> Or if you're just posing a question as a challenge for people to exercise
> their brains, this would be better off in the Perl Quiz-of-the-Week list
> (which hasn't seen any traffic in aeons).

Hey, dude! Beware of Fish! This was rude! You did not greet the nice
person, you did not compliment his ability to copy&paste his homework
and you did not spoon-feed him. This way we'll scare off the
beginners and we do not want to do that, right? Even if the beginners
are lazy cheaters that believe their professor is not clever enough
to check the archives and see who cheated.

Jenda
P.S.: Reading it again, it probably wasn't a copy&paste job. "Device"
....
===== Jenda [at] Krynicky.cz === http://Jenda.Krynicky.cz =====
When it comes to wine, women and song, wizards are allowed
to get drunk and croon as much as they like.
-- Terry Pratchett in Sourcery


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On 11-04-19 07:29 PM, ai nguyen wrote:
>
> A population of 20 cows, each one has age and weight (known).
> Device this population into 2 group, each group has 10 cows.
>
> Questions:
> How to pick a cow on each group so that a distribution of AGE and
> WEIGHT on each group is similar. Show your strategy or/and implement
> it in PERL.
>

What code do you have so far?


--
Just my 0.00000002 million dollars worth,
Shawn

Confusion is the first step of understanding.

Programming is as much about organization and communication
as it is about coding.

The secret to great software: Fail early & often.

Eliminate software piracy: use only FLOSS.

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On Apr 20, 5:28=A0am, shawnhco... [at] ncf.ca (Shawn H Corey) wrote:
> On 11-04-19 07:29 PM, ai nguyen wrote:
>
>
>
> > A population of 20 cows, each one has age and weight (known).
> > Device this population into 2 group, each group has 10 cows.
>
> > Questions:
> > How to pick a cow on each group so that a distribution of AGE and
> > WEIGHT on each group is similar. Show your strategy or/and implement
> > it in PERL.
>
> What code do you have so far?
>
> --
> Just my 0.00000002 million dollars worth,
> =A0 =A0Shawn
>
> Confusion is the first step of understanding.
>
> Programming is as much about organization and communication
> as it is about coding.
>
> The secret to great software: =A0Fail early & often.
>
> Eliminate software piracy: =A0use only FLOSS.


I have yet code it. I just try to understand the problem first. Does
anyone has any ideas?


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Suppose that you want to sell the cows. You have two buyers, and each =
one
is paying you $10,000 for 10 cows. You want to divide the cows as =
fairly as
possible so that each buyer gets the same value. Who would you split =
the
cows up?

Does that help any?



-----Original Message-----
From: ai nguyen [mailto:aichuabiet [at] gmail.com]
Sent: Wednesday, April 20, 2011 3:31 PM
To: beginners [at] perl.org
Subject: Re: sample distribution

On Apr 20, 5:28=A0am, shawnhco... [at] ncf.ca (Shawn H Corey) wrote:
> On 11-04-19 07:29 PM, ai nguyen wrote:
>
>
>
> > A population of 20 cows, each one has age and weight (known).
> > Device this population into 2 group, each group has 10 cows.
>
> > Questions:
> > How to pick a cow on each group so that a distribution of AGE and
> > WEIGHT on each group is similar. Show your strategy or/and implement
> > it in PERL.
>
> What code do you have so far?
>
> --
> Just my 0.00000002 million dollars worth,
> =A0 =A0Shawn
>
> Confusion is the first step of understanding.
>
> Programming is as much about organization and communication
> as it is about coding.
>
> The secret to great software: =A0Fail early & often.
>
> Eliminate software piracy: =A0use only FLOSS.


I have yet code it. I just try to understand the problem first. Does
anyone has any ideas?


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Sorry about the typo. HOW would you split the cows up?

-----Original Message-----
From: Tim Lewis [mailto:twlewis [at] sc.rr.com]
Sent: Wednesday, April 20, 2011 3:40 PM
To: beginners [at] perl.org
Subject: RE: sample distribution

Suppose that you want to sell the cows. You have two buyers, and each =
one
is paying you $10,000 for 10 cows. You want to divide the cows as =
fairly as
possible so that each buyer gets the same value. Who would you split =
the
cows up?

Does that help any?



-----Original Message-----
From: ai nguyen [mailto:aichuabiet [at] gmail.com]
Sent: Wednesday, April 20, 2011 3:31 PM
To: beginners [at] perl.org
Subject: Re: sample distribution

On Apr 20, 5:28=A0am, shawnhco... [at] ncf.ca (Shawn H Corey) wrote:
> On 11-04-19 07:29 PM, ai nguyen wrote:
>
>
>
> > A population of 20 cows, each one has age and weight (known).
> > Device this population into 2 group, each group has 10 cows.
>
> > Questions:
> > How to pick a cow on each group so that a distribution of AGE and
> > WEIGHT on each group is similar. Show your strategy or/and implement
> > it in PERL.
>
> What code do you have so far?
>
> --
> Just my 0.00000002 million dollars worth,
> =A0 =A0Shawn
>
> Confusion is the first step of understanding.
>
> Programming is as much about organization and communication
> as it is about coding.
>
> The secret to great software: =A0Fail early & often.
>
> Eliminate software piracy: =A0use only FLOSS.


I have yet code it. I just try to understand the problem first. Does
anyone has any ideas?


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On 4/20/11 Wed Apr 20, 2011 12:31 PM, "ai nguyen" <aichuabiet [at] gmail.com>
scribbled:

> On Apr 20, 5:28=A0am, shawnhco... [at] ncf.ca (Shawn H Corey) wrote:
>> On 11-04-19 07:29 PM, ai nguyen wrote:
>>
>>
>>> A population of 20 cows, each one has age and weight (known).
>>> Device this population into 2 group, each group has 10 cows.
>>
>>> Questions:
>>> How to pick a cow on each group so that a distribution of AGE and
>>> WEIGHT on each group is similar. Show your strategy or/and implement
>>> it in PERL.
>>
>> What code do you have so far?

>
> I have yet code it. I just try to understand the problem first. Does
> anyone has any ideas?

Yes. Ask your instructor.

Is this a homework question?

The purpose of this mailing list is to discuss Perl and Perl-related issues=
..
You won't be able to start a Perl implementation to solve your problem unti=
l
you understand your problem. None of us can help you with that, because onl=
y
you know the circumstances that went into formulating the problem. We would
just be making assumptions.

Maybe this is a homework problem. Maybe you work at a dairy farm being
subdivided into two farms. The conditions of your problem will affect the
optimum solution.

Once you understand the problem, you can discuss how the solution might be
implemented using Perl.

However, if this is an exercise to help you learn Perl programming, we woul=
d
not be doing you a favor by providing you with a solution. It will be much
better if you first try to solve the problem on your own and only ask
questions if you cannot do what you want using Perl.

Good luck.



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On Apr 20, 12:39=A0pm, twle... [at] sc.rr.com ("Tim Lewis") wrote:
> Suppose that you want to sell the cows. =A0You have two buyers, and each =
one
> is paying you $10,000 for 10 cows. =A0You want to divide the cows as fair=
ly as
> possible so that each buyer gets the same value. =A0Who would you split t=
he
> cows up?
>
> Does that help any?

It closest answer so far. The idea is a COW has WEIGHT and AGE
variables, divide into two group so that each group has similar
DISTRIBUTION in WEIGHT and AGE. Please forget about implemented in
Perl, just get an idea for now.









>
> -----Original Message-----
> From: ai nguyen [mailto:aichuab... [at] gmail.com]
> Sent: Wednesday, April 20, 2011 3:31 PM
> To: beginn... [at] perl.org
> Subject: Re: sample distribution
>
> On Apr 20, 5:28=A0am, shawnhco... [at] ncf.ca (Shawn H Corey) wrote:
> > On 11-04-19 07:29 PM, ai nguyen wrote:
>
> > > A population of 20 cows, each one has age and weight (known).
> > > Device this population into 2 group, each group has 10 cows.
>
> > > Questions:
> > > How to pick a cow on each group so that a distribution of AGE and
> > > WEIGHT on each group is similar. Show your strategy or/and implement
> > > it in PERL.
>
> > What code do you have so far?
>
> > --
> > Just my 0.00000002 million dollars worth,
> > =A0 =A0Shawn
>
> > Confusion is the first step of understanding.
>
> > Programming is as much about organization and communication
> > as it is about coding.
>
> > The secret to great software: =A0Fail early & often.
>
> > Eliminate software piracy: =A0use only FLOSS.
>
> I have yet code it. I just try to understand the problem first. Does
> anyone has any ideas?
>
> --
> To unsubscribe, e-mail: beginners-unsubscr... [at] perl.org
> For additional commands, e-mail: beginners-h... [at] perl.orghttp://learn.perl=
..org/
>
>


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Try this:
Make up mock values for 20 cows with age and weight, and write those =
values
on 20 index cards. Now, go through the cards and separate as evenly as
possible by age and weight. Either age or weight needs to take =
precedence.
As Jim has already pointed out, there are some unknown =
variables/decisions
that your instructor needs to clarify. Now write down the steps of your
thinking in your decision making process. All you are doing in code is
telling the computer to do what you do in your thinking process.

-----Original Message-----
From: ai nguyen [mailto:aichuabiet [at] gmail.com]
Sent: Wednesday, April 20, 2011 3:58 PM
To: beginners [at] perl.org
Subject: Re: sample distribution

On Apr 20, 12:39=A0pm, twle... [at] sc.rr.com ("Tim Lewis") wrote:
> Suppose that you want to sell the cows. =A0You have two buyers, and =
each one
> is paying you $10,000 for 10 cows. =A0You want to divide the cows as =
fairly
as
> possible so that each buyer gets the same value. =A0Who would you =
split the
> cows up?
>
> Does that help any?

It closest answer so far. The idea is a COW has WEIGHT and AGE
variables, divide into two group so that each group has similar
DISTRIBUTION in WEIGHT and AGE. Please forget about implemented in
Perl, just get an idea for now.









>
> -----Original Message-----
> From: ai nguyen [mailto:aichuab... [at] gmail.com]
> Sent: Wednesday, April 20, 2011 3:31 PM
> To: beginn... [at] perl.org
> Subject: Re: sample distribution
>
> On Apr 20, 5:28=A0am, shawnhco... [at] ncf.ca (Shawn H Corey) wrote:
> > On 11-04-19 07:29 PM, ai nguyen wrote:
>
> > > A population of 20 cows, each one has age and weight (known).
> > > Device this population into 2 group, each group has 10 cows.
>
> > > Questions:
> > > How to pick a cow on each group so that a distribution of AGE and
> > > WEIGHT on each group is similar. Show your strategy or/and =
implement
> > > it in PERL.
>
> > What code do you have so far?
>
> > --
> > Just my 0.00000002 million dollars worth,
> > =A0 =A0Shawn
>
> > Confusion is the first step of understanding.
>
> > Programming is as much about organization and communication
> > as it is about coding.
>
> > The secret to great software: =A0Fail early & often.
>
> > Eliminate software piracy: =A0use only FLOSS.
>
> I have yet code it. I just try to understand the problem first. Does
> anyone has any ideas?
>
> --
> To unsubscribe, e-mail: beginners-unsubscr... [at] perl.org
> For additional commands, e-mail:
beginners-h... [at] perl.orghttp://learn.perl.org/
>
>


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--00248c0eef52a9a14d04a160fe30
Content-Type: text/plain; charset=ISO-8859-1

On Apr 20, 2011 1:05 AM, "ai nguyen" <aichuabiet [at] gmail.com> wrote:
>
>
> A population of 20 cows, each one has age and weight (known).

Irrelevant

> Device this population into 2 group, each group has 10 cows.
>
two data sets to compare

> Questions:
> How to pick a cow on each group so that a distribution of AGE and
> WEIGHT on each group is similar.

Which property should have more weight? If neither, than just add them up
and use that result to compare. The sort and loop for each set and store the
index in a value if set1 - set2 is less than the old result.

Show your strategy or/and implement
> it in PERL.

Irrelevant.

>
> Thanks
>
Yeah. But when you ask questions in the future, think about the task, try to
do something (hell, try to fail if you must) and then post. When everyone
knows its homework that probably means that you've failed at failing and
should sleep off your hangover and try again.

--00248c0eef52a9a14d04a160fe30--

On 4/20/11 Wed Apr 20, 2011 3:17 PM, "shawn wilson" <ag4ve.us [at] gmail.com>
scribbled:

> On Apr 20, 2011 1:05 AM, "ai nguyen" <aichuabiet [at] gmail.com> wrote:
>>
>>
>> A population of 20 cows, each one has age and weight (known).
>
> Irrelevant

I don't think so. The fact that there are 20 cows and 2 attributes for each
is central to the problem.

>
>> Device this population into 2 group, each group has 10 cows.
>>
> two data sets to compare

Not quite. Two sets to create out of the given initial set.

>
>> Questions:
>> How to pick a cow on each group so that a distribution of AGE and
>> WEIGHT on each group is similar.
>
> Which property should have more weight? If neither, than just add them up
> and use that result to compare. The sort and loop for each set and store the
> index in a value if set1 - set2 is less than the old result.

Both properties should probably have equal weight.

You must first define what you mean by "distribution". There are several
measures of distribution: average, standard deviation, mean, median, etc.
There are probably more complex measures that only students of statistics
will know about (not me).

Having selected a measurement method for comparing distribution, you must
then think of a partitioning algorithm that will create two sets with the
closest distribution values. I bet a random selection won't do too bad.

You might then want to try picking a pair of cows, swapping them, and seeing
if it improves the distribution comparison.

>
> Show your strategy or/and implement
>> it in PERL.
>
> Irrelevant.

Not totally irrelevant to the problem of implementing the solution in Perl.

>
>>
>> Thanks
>>
> Yeah. But when you ask questions in the future, think about the task, try to
> do something (hell, try to fail if you must) and then post. When everyone
> knows its homework that probably means that you've failed at failing and
> should sleep off your hangover and try again.

I canb agree on that point.



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Hi Jenda,

On Wednesday 20 Apr 2011 10:21:40 Jenda Krynicky wrote:
> From: Peter Scott <Peter [at] PSDT.com>
>
> > On Tue, 19 Apr 2011 16:29:16 -0700, ai nguyen wrote:
> > > A population of 20 cows, each one has age and weight (known). Device
> > > this population into 2 group, each group has 10 cows.
> > >
> > > Questions:
> > > How to pick a cow on each group so that a distribution of AGE and
> > > WEIGHT on each group is similar. Show your strategy or/and implement
> > > it in PERL.
> >
> > Is this a question on a quiz or test you're taking? Do the people giving
> > the test have the expectation that your answer is a measure of your
> > abilities or those of people you've asked for help?
> >
> > How far have you gotten with a solution?
> >
> > Or if you're just posing a question as a challenge for people to exercise
> > their brains, this would be better off in the Perl Quiz-of-the-Week list
> > (which hasn't seen any traffic in aeons).
>
> Hey, dude! Beware of Fish! This was rude! You did not greet the nice
> person, you did not compliment his ability to copy&paste his homework
> and you did not spoon-feed him. This way we'll scare off the
> beginners and we do not want to do that, right? Even if the beginners
> are lazy cheaters that believe their professor is not clever enough
> to check the archives and see who cheated.

Just for the record, I did not find his response rude. He was asking several
questions and I don't expect people to spoon feed people with solutions to
their off-the-wall homework problems. Most of the people here don't know how
to solve this problem, whether in Perl, or in any other programming language,
and we should tell people they should show some initial effort to learn Perl
and show us the code they have so far.

Peter's E-mail could have been a bit better, but overall it was OK.

Just for the record, you may wish to refer to me as "Mr. Fish" or "Shlomi" or
"Shlomi Fish" or whatever due to the multi-ambiguity of my last name:

http://en.wikipedia.org/wiki/Fish_%28disambiguation%29

Regards,

Shlomi Fish

--
------------------------------------------------------------ -----
Shlomi Fish http://www.shlomifish.org/
Original Riddles - http://www.shlomifish.org/puzzles/

There's no point in keeping an idea to yourself since there's a 10 to 1 chance
that somebody already has it and will share it before you.

Please reply to list if it's a mailing list post - http://shlom.in/reply .

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On 20/04/2011 08:21, Jenda Krynicky wrote:
> From: Peter Scott<Peter [at] PSDT.com>
>>
>> Is this a question on a quiz or test you're taking? Do the people giving
>> the test have the expectation that your answer is a measure of your
>> abilities or those of people you've asked for help?
>>
>> How far have you gotten with a solution?
>>
>> Or if you're just posing a question as a challenge for people to exercise
>> their brains, this would be better off in the Perl Quiz-of-the-Week list
>> (which hasn't seen any traffic in aeons).
>
> Hey, dude! Beware of Fish! This was rude! You did not greet the nice
> person, you did not compliment his ability to copy&paste his homework
> and you did not spoon-feed him. This way we'll scare off the
> beginners and we do not want to do that, right? Even if the beginners
> are lazy cheaters that believe their professor is not clever enough
> to check the archives and see who cheated.

Sadly, you have been waiting on a stern response so that you could leap
in and villify the poster in mockery of Shlomi. Hopefully you can see
the difference between what Peter wrote and the nastiness that is your
own habit?

I have learned to respect those who both know Perl well and can
encourage and convey its utility. You are not one of them.

Rob

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All,

I truly appreciate your responses. It is one of the interview
questions at google research! We like to know how someone could
approach a problem ?
Why begin perl forum? I like perl and We are looking for a perl
developer, or perl thinker.

Welcome all questions/answers!


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On 21/04/2011 18:09, ai nguyen wrote:
>
> I truly appreciate your responses. It is one of the interview
> questions at google research! We like to know how someone could
> approach a problem ?
>
> Why begin perl forum? I like perl and We are looking for a perl
> developer, or perl thinker.
>
> Welcome all questions/answers!

I will contact Google about this post. Please stop pretending.

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On 4/21/11 Thu Apr 21, 2011 10:59 AM, "Rob Dixon" <rob.dixon [at] gmx.com>
scribbled:

> On 21/04/2011 18:09, ai nguyen wrote:
>>
>> I truly appreciate your responses. It is one of the interview
>> questions at google research! We like to know how someone could
>> approach a problem ?
>>
>> Why begin perl forum? I like perl and We are looking for a perl
>> developer, or perl thinker.
>>
>> Welcome all questions/answers!
>
> I will contact Google about this post. Please stop pretending.

Although I jumped to the same conclusion, at no point in his post did Mr.
Nguyen actually claim to be working for or representing Google.



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On 21/04/2011 19:19, Jim Gibson wrote:
> On 4/21/11 Thu Apr 21, 2011 10:59 AM, "Rob Dixon"<rob.dixon [at] gmx.com>scribbled:
>> On 21/04/2011 18:09, ai nguyen wrote:
>>>
>>> I truly appreciate your responses. It is one of the interview
>>> questions at google research! We like to know how someone could
>>> approach a problem ?
>>>
>>> Why begin perl forum? I like perl and We are looking for a perl
>>> developer, or perl thinker.
>>>
>>> Welcome all questions/answers!
>>
>> I will contact Google about this post. Please stop pretending.
>
> Although I jumped to the same conclusion, at no point in his post did Mr.
> Nguyen actually claim to be working for or representing Google.

Can you imagine a situation where a post like that was other than
fraudulent? Are you trolling yourself?

Rob

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On Apr 21, 2011 2:27 PM, "Rob Dixon" <rob.dixon [at] gmx.com> wrote:
>
> On 21/04/2011 19:19, Jim Gibson wrote:
>>
>> On 4/21/11 Thu Apr 21, 2011 10:59 AM, "Rob Dixon"<rob.dixon [at] gmx.com
>scribbled:
>>>
>>> On 21/04/2011 18:09, ai nguyen wrote:
>>>>
>>>>
>>>> I truly appreciate your responses. It is one of the interview
>>>> questions at google research! We like to know how someone could
>>>> approach a problem ?
>>>>
>>>> Why begin perl forum? I like perl and We are looking for a perl
>>>> developer, or perl thinker.
>>>>
>>>> Welcome all questions/answers!
>>>
>>>
>>> I will contact Google about this post. Please stop pretending.
>>
>>
>> Although I jumped to the same conclusion, at no point in his post did Mr.
>> Nguyen actually claim to be working for or representing Google.
>
>
> Can you imagine a situation where a post like that was other than
> fraudulent? Are you trolling yourself?
>
>

The email address isn't very active but there is a post to a hadoop list.
The name brings up tons of Facebook matches and I just didn't care enough to
look if one was into tech of any kind. Either way, I give it a 50/50 chance
at being valid.

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On 4/21/11 Thu Apr 21, 2011 11:26 AM, "Rob Dixon" <rob.dixon [at] gmx.com>
scribbled:

> On 21/04/2011 19:19, Jim Gibson wrote:
>> On 4/21/11 Thu Apr 21, 2011 10:59 AM, "Rob
>> Dixon"<rob.dixon [at] gmx.com>scribbled:
>>> On 21/04/2011 18:09, ai nguyen wrote:
>>>>
>>>> I truly appreciate your responses. It is one of the interview
>>>> questions at google research! We like to know how someone could
>>>> approach a problem ?
>>>>
>>>> Why begin perl forum? I like perl and We are looking for a perl
>>>> developer, or perl thinker.
>>>>
>>>> Welcome all questions/answers!
>>>
>>> I will contact Google about this post. Please stop pretending.
>>
>> Although I jumped to the same conclusion, at no point in his post did Mr.
>> Nguyen actually claim to be working for or representing Google.
>
> Can you imagine a situation where a post like that was other than
> fraudulent?

Yes. The OP obtained a question used by Company A (Google) and was curious
how other people would go about solving it. His employer (Company B) is
looking for Perl expertise and was thinking about using the question as part
of the interview process, but needed to first get a solution. Not being a
native English speaker, the OP didn't realize that the close juxtaposition
of "google research" and "We" would make people like you and me think he
works for Google. At least I think that is what you are implying. Please
correct me if I am wrong.

> Are you trolling yourself?

No. I am respectfully disagreeing with your interpretation of Mr. Nguyen's
post and suggesting that you are over-reacting by threatening to contact
Google about it.



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