Here's another in the "Tricks for Teachers" category. This is straight from
the J toybox.
A List of students in class
$A Shape or number of items in the list
B Rearrange the order of names
C Assign students to partners for day to work on joint project
D Use J to randomly assign different groups
E Assign groups of three. However, Raul fills in the 15th slot. He
picks the group he wantsto join
F The next time Jessie gets to pick
Linda
]A=: ;: 'Raul Millie willie Lou Andy Jessie Sue Ted Dave Ruthie Jean Lola
Jack Joe '
-----T------T------T---T----T------T---T---T----T------T----T----T----T---┐
│Raul│Millie│willie│Lou│Andy│Jessie│Sue│Ted│Dave│Ruthie│Jean│Lola│Jack│Joe│
L----+------+------+---+----+------+---+---+----+------+----+----+----+----
$A
14
]B=:(14 ? 14) { A
-------T----T---T----T----T------T----T---T------T---T----T------T---T----┐
│Jessie│Dave│Joe│Jack│Raul│willie│Andy│Ted│Ruthie│Sue│Jean│Millie│Lou│Lola│
L------+----+---+----+----+------+----+---+------+---+----+------+---+-----
]C=:2 7 $ A
-----T------T------T----T----T------T---┐
│Raul│Millie│willie│Lou │Andy│Jessie│Sue│
+----+------+------+----+----+------+---+
│Ted │Dave │Ruthie│Jean│Lola│Jack │Joe│
L----+------+------+----+----+------+----
]D=:2 7 $ B
-------T------T---T----T------T------T----┐
│Jessie│Dave │Joe│Jack│Raul │willie│Andy│
+------+------+---+----+------+------+----+
│Ted │Ruthie│Sue│Jean│Millie│Lou │Lola│
L------+------+---+----+------+------+-----
]E=:3 5 $ A
-------T------T------T----T------┐
│Raul │Millie│willie│Lou │Andy │
+------+------+------+----+------+
│Jessie│Sue │Ted │Dave│Ruthie│
+------+------+------+----+------+
│Jean │Lola │Jack │Joe │Raul │
L------+------+------+----+-------
]F=:3 5 $ B
-------T------T---T------T------┐
│Jessie│Dave │Joe│Jack │Raul │
+------+------+---+------+------+
│willie│Andy │Ted│Ruthie│Sue │
+------+------+---+------+------+
│Jean │Millie│Lou│Lola │Jessie│
L------+------+---+------+-------
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Linda Alvord
Sent: Monday, September 22, 2014 9:18 AM
To: [email protected]
Subject: Re: [Jbeta] Here's what's needed to win the first grade teachers.
I agree. It's looking good.
'label' 't o p' tblb 'side' >;:'other stuff goes here'
------T-----┐
│label│t o p│
+-----+-----+
│s │other│
│i │stuff│
│d │goes │
│e │here │
L-----+------
4 3$<' '
---T--T--┐
│ │ │ │
+--+--+--+
│ │ │ │
+--+--+--+
│ │ │ │
+--+--+--+
│ │ │ │
L--+--+---
Linda
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Dan Bron
Sent: Monday, September 22, 2014 9:02 AM
To: [email protected]
Subject: Re: [Jbeta] Here's what's needed to win the first grade teachers.
Raul wrote:
> tblb=:conjunction define NB. (
> :
> (x ,&boxopen m),:(,.L:0 n) ,&boxopen y
> )
Hey! "NB. )". That's really clever. Well done.
-Dan
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