Rubyã§ã®é †åˆ—ã€çµ„ã¿åˆã‚ã›ã€‚ - simanã®ãƒ–ãƒã‚°Rubyã§ã¯ã€Œé †åˆ—ã€ã¨ã€Œçµ„ã¿åˆã‚ã›ã€ã‚’Arrayクラスã®combinationメソッドã¨permutationメソッドを用ã„ã‚‹ã“ã¨ã§ã€ç°¡å˜ã«æ±‚ã‚ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ array = [1,2,3,4] p array.combination(3).to_a [[1, 2, 3], [1, 2, 4], [1, 3, 4], [2, 3, 4]]combinationã®å¼•æ•°ã¯é¸ã³å‡ºã™è¦ç´ ã®å€‹æ•°ã‚’指定ã™ã‚‹ã€‚ array = [1,2,3] p array.permutation(3).to_a [[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]両方ã¨ã‚‚便利ãªãƒ¡ã‚½ãƒƒãƒ‰ã§ã™ã€‚ ã¾ãŸã€è¦ç´ ã®é‡è¤‡ã‚’許å¯ã™ã‚‹å ´åˆã¯ repeated_combination ã‚„ repeated_permutation ãŒåˆ©ç”¨ã§ãã¾ã™ã€‚ ãªãœ
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