|: (A.~ i.@!@#) 'abcd' NB. generate the permutationsdirectly
aaaaaabbbbbbccccccdddddd
bbccddaaccddaabbddaabbcc
cdbdbccdadacbdadabbcacab
dcdbcbdcdacadbdabacbcaba
NB. find the subsets within
([: <@~.@|:\ [: |: (A.~ i.@!@#)) 'abcd'
┌─┬──┬───┬────┐
│a│ab│abc│abcd│
│b│ac│abd│abdc│
│c│ad│acb│acbd│
│d│ba│acd│acdb│
│ │bc│adb│adbc│
│ │bd│adc│adcb│
│ │ca│bac│bacd│
│ │cb│bad│badc│
│ │cd│bca│bcad│
│ │da│bcd│bcda│
│ │db│bda│bdac│
│ │dc│bdc│bdca│
│ │ │cab│cabd│
│ │ │cad│cadb│
│ │ │cba│cbad│
│ │ │cbd│cbda│
│ │ │cda│cdab│
│ │ │cdb│cdba│
│ │ │dab│dabc│
│ │ │dac│dacb│
│ │ │dba│dbac│
│ │ │dbc│dbca│
│ │ │dca│dcab│
│ │ │dcb│dcba│
└─┴──┴───┴────┘
On 12/6/18 7:00 AM, programming-requ...@forums.jsoftware.com wrote:
Date: Wed, 5 Dec 2018 19:45:51 -0600
From: Skip Cave<s...@caveconsulting.com>
To:"programm...@jsoftware.com" <programm...@jsoftware.com>
Subject: [Jprogramming] Boxed indices
Message-ID:
<caj8lg_dqrajrtogrm0grouokjnjabvhvmguaoa3gd94w9u6...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I want to generate all the 1, 2, 3, & 4 permutations of 4 items.
I can generate the indices:
(1 2 3 4 perm each 4)
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