Re: [Jprogramming] Difficulties understanding a sentence with the compose-conjunction

[Linda Alvord]

Here's a way to avoid  & 

to2=: 13 :'((i.y)-.i.x),y'
      
   
   7 to2 11
7 8 9 10 11
   
   to2
] ,~ ([: i. ]) -. [: i. [
   

Linda


-----Original Message-----
From: Programming <programming-boun...@forums.jsoftware.com> On Behalf Of 
Thomas Bulka
Sent: Saturday, June 29, 2019 3:20 PM
To: programm...@jsoftware.com
Subject: Re: [Jprogramming] Difficulties understanding a sentence with the 
compose-conjunction

Am 29.06.2019 20:45 schrieb Clifford Reiter:
> Do these experiments help?
> 
> to =: -.&i.~,]
> 
> 3 to 5
> 
> 3 4 5
> 
> 3 -.&i.~ 5
> 
> 3 4
> 
> 5 -.&i. 3
> 
> 3 4
> 
> (i.5)-.(i.3)
> 
> 3 4

Hello Clifford,

thank you very much for your quick reply! By working through your examples, I 
got a better understanding, I think. Probably my description is 
terminologically weak, but now I would describe my understanding of the 
to-sentence like this:

1. The i~ is used to generate the vectors (i. y) and (i. x).
2. The less-primitive is used to remove (i. x) from (i. y), giving a result of 
x..y-1.
3. Finally the ,] is applied to add the upper limit, provided as the parameter 
y, to the result.

Is this, what the to-sentence is supposed to do?

Kind regards,

Thomas

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