Usage

$ npm i percom

1. Listing every possible combinatioins (組み合わせ)

importpercomfrom"percom";percom.com(array,num);//array => Target array (対象の配列)//num => Number of elements in a combination (組み合わせの数)

Example

constarray=["A","B","C"];constresult1=percom.com(array,2);//result1 = [ [ "A", "B" ], [ "A, "C ], [ "B", "C" ] ]constresult2=percom.com(array,1);//result2 = [ [ "A" ], [ "B" ], [ "C" ] ]

Count the number of possible combination (組み合わせの数を数える)

percom.countCom(n,r);//n => Number of elements in an array (要素数)//r => Number of elements in a combination (選ぶ要素の数)

Example

percom.countCom(8,3);// => 56

2. Listing every possible permutaiton (順列)

percom.per(array,num);//array => Target array (対象の配列)//num => Number of elements in a permutation (一つ一つの順列の要素数)

Example

constarray=["A","B","C"];constresult1=percom.per(array,2);//result1 = [ [ 'A', 'B' ], [ 'A', 'C' ], [ 'B', 'A' ], [ 'B', 'C' ], [ 'C', 'A' ], [ 'C', 'B' ] ]constresult2=percom.per(array,1);//result2 = [ [ "A" ], [ "B" ], [ "C" ] ]

Count the number of possible permutation (順列の数を数える)

percom.countPer(n,r);//n => Number of elements in an array (要素数)//r => Number of elements in a permutation (一つ一つの順列の要素数)

Example

percom.countPer(8,3);// => 336

License

Development

yarninstall// before create PRyarnmocha

Developer