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## #26 2012-05-03 07:57:20

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

Yes, Lisp uses it and so does the big boy on the block, M.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #27 2012-05-03 07:59:40

anonimnystefy
Real Member

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### Re: working out which addends from a list will add up to a given value.

And if Lisp uses it,and Maxima uses Lisp,then maybe Maxima also uses it...

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #28 2012-05-03 08:02:52

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

I am not big on jargon or definitions. That is for set theorists, topologists and logicians. To me it means no more loops! Say goodbye to For Next, Do Until, Do While, Loop, Goto...

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #29 2012-05-03 08:05:52

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

I hate goto.

But what does it use if not loops?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #30 2012-05-03 08:08:08

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

Lists!

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #31 2012-05-03 08:11:34

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #32 2012-05-03 08:16:20

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

Pointers are a bane to humanity. My brother was the only programmer that liked them. They are very powerful but too dangerous for the modern programmer so they were eliminated in Java.

The functional way does not need them.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #33 2012-05-03 08:17:51

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

So,do you mean like ordered and unordered lists like in Python? At least I think I saw them there.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #34 2012-05-03 08:19:19

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

Python does do some functional programming.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #35 2012-05-03 08:21:11

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

Wow,any of the people who thought me English would kill me if I said that.

So,how do you use lists for setting up GFs?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #36 2012-05-03 08:25:14

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

You do not use even them to do it. M supports polynomial arithmetic and rational functions. In C++ you write a polynomial class.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #37 2012-05-03 08:27:25

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

Wait,I don't understand what you would do to get the result.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #38 2012-05-03 08:28:21

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

Same thing I was attempting to get you to do in Maxima. M works in the same way.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #39 2012-05-03 08:30:59

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

Oh,the sum function. But wouldn't it be time consuming to write out that many functions?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #40 2012-05-03 08:35:58

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

Some times it is impossible to avoid. This one took about 5 minutes.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #41 2012-05-03 08:42:36

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

I think that you would have to let this one to procedural programming,because it is too much to write every function separately.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #42 2012-05-03 09:14:30

bobbym

Online

### Re: working out which addends from a list will add up to a given value.

You could do it but just do not do it by hand.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #43 2012-05-03 09:23:36

anonimnystefy
Real Member

Offline

### Re: working out which addends from a list will add up to a given value.

I wasn't even thinking about doing it by hand. It would be insane. Don't you think I have learned at least a little from you?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment