Created
April 8, 2021 03:51
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import R from "ramda"; | |
const scaner = y => R.map(x => R.join(";", [y, x])); | |
const permutationOrderly = aoa => R.reduce( | |
(a, b) => R.flatten( R.juxt( R.map( scaner, a ) )( b ) ), | |
R.head(aoa), | |
R.remove(0, 1, aoa) | |
); | |
// -- trace | |
const data = [ | |
["a", "b", "c", "d"], | |
[1, 2, 3, 4, 5, 6, 7], | |
["A", "B", "C"], | |
["一", "二"] | |
]; | |
const results = permutationOrderly(data); | |
console.log("input ", data); | |
console.log("output ", results); | |
console.log("check ", | |
R.equals(R.uniq(results).length, results.length), | |
R.all(R.identity, R.map(x => R.eqBy(x, data.length), results)) | |
); |
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output [
'a;1;A;一', 'a;1;A;二', 'a;1;B;一', 'a;1;B;二', 'a;1;C;一', 'a;1;C;二',
'a;2;A;一', 'a;2;A;二', 'a;2;B;一', 'a;2;B;二', 'a;2;C;一', 'a;2;C;二',
'a;3;A;一', 'a;3;A;二', 'a;3;B;一', 'a;3;B;二', 'a;3;C;一', 'a;3;C;二',
'a;4;A;一', 'a;4;A;二', 'a;4;B;一', 'a;4;B;二', 'a;4;C;一', 'a;4;C;二',
'a;5;A;一', 'a;5;A;二', 'a;5;B;一', 'a;5;B;二', 'a;5;C;一', 'a;5;C;二',
'a;6;A;一', 'a;6;A;二', 'a;6;B;一', 'a;6;B;二', 'a;6;C;一', 'a;6;C;二',
'a;7;A;一', 'a;7;A;二', 'a;7;B;一', 'a;7;B;二', 'a;7;C;一', 'a;7;C;二',
'b;1;A;一', 'b;1;A;二', 'b;1;B;一', 'b;1;B;二', 'b;1;C;一', 'b;1;C;二',
'b;2;A;一', 'b;2;A;二', 'b;2;B;一', 'b;2;B;二', 'b;2;C;一', 'b;2;C;二',
'b;3;A;一', 'b;3;A;二', 'b;3;B;一', 'b;3;B;二', 'b;3;C;一', 'b;3;C;二',
'b;4;A;一', 'b;4;A;二', 'b;4;B;一', 'b;4;B;二', 'b;4;C;一', 'b;4;C;二',
'b;5;A;一', 'b;5;A;二', 'b;5;B;一', 'b;5;B;二', 'b;5;C;一', 'b;5;C;二',
'b;6;A;一', 'b;6;A;二', 'b;6;B;一', 'b;6;B;二', 'b;6;C;一', 'b;6;C;二',
'b;7;A;一', 'b;7;A;二', 'b;7;B;一', 'b;7;B;二', 'b;7;C;一', 'b;7;C;二',
'c;1;A;一', 'c;1;A;二', 'c;1;B;一', 'c;1;B;二', 'c;1;C;一', 'c;1;C;二',
'c;2;A;一', 'c;2;A;二', 'c;2;B;一', 'c;2;B;二', 'c;2;C;一', 'c;2;C;二',
'c;3;A;一', 'c;3;A;二', 'c;3;B;一', 'c;3;B;二',
... 68 more items
]