combinations

问题 Hi so I'm working with python and I'm trying to write a method where given a string, it would find every combination of that string and append it to a list. I'll give the string and show the outcome that I want. string: x = 'god' outcome: lst = ['g', 'o', 'd', 'go', 'gd', 'og', 'od', 'dg', 'do', 'god', 'gdo', 'ogd', 'odg', 'dgo', 'dog'] A letter can only be used by the number of times it appears on the string given, so if our string is 'god' , 'gg' or 'goo' etc. cannot be appended. If this

问题 Hi so I'm working with python and I'm trying to write a method where given a string, it would find every combination of that string and append it to a list. I'll give the string and show the outcome that I want. string: x = 'god' outcome: lst = ['g', 'o', 'd', 'go', 'gd', 'og', 'od', 'dg', 'do', 'god', 'gdo', 'ogd', 'odg', 'dgo', 'dog'] A letter can only be used by the number of times it appears on the string given, so if our string is 'god' , 'gg' or 'goo' etc. cannot be appended. If this

问题 I want to create a list for my classroom of every possible group of 4 students. If I have 20 students, how I can I create this, by group, in R where my rows are each combination and there are 20 columns for the full list of student ids and columns 1-4 are "group1", 5-9 are "group2" etc. etc. The below gives a list of possible combinations for each single group of 4 students (x1, x2, x3, and x4). Now, for each row listed, what are the possibilities for the other 4 groups of 4 students? So,

问题 I want to create a list for my classroom of every possible group of 4 students. If I have 20 students, how I can I create this, by group, in R where my rows are each combination and there are 20 columns for the full list of student ids and columns 1-4 are "group1", 5-9 are "group2" etc. etc. The below gives a list of possible combinations for each single group of 4 students (x1, x2, x3, and x4). Now, for each row listed, what are the possibilities for the other 4 groups of 4 students? So,

问题 as I had been looking for ways to optimize a password cracker I had been making, I came across a much shorter implementation of all possible character combinations in a list, which used this function: mapM (const xs) [1..n] where xs could be the characters available, and n the length of the desired words. so mapM (const "abcd") [1..4] would output a list ["aaaa","aaab","aaac","aaad","aaba","aabb"..] and so on. Only the length matters for the list of th right, I could have written ['f','h','s'

来源： https://stackoverflow.com/questions/64474835/r-extract-inner-higher-level-combinations-groups-of-1-2-3-and-4-elements-o

来源： https://stackoverflow.com/questions/64474835/r-extract-inner-higher-level-combinations-groups-of-1-2-3-and-4-elements-o

来源： https://stackoverflow.com/questions/30159469/all-possible-combinations-of-a-word-python

来源： https://stackoverflow.com/questions/30159469/all-possible-combinations-of-a-word-python

来源： https://stackoverflow.com/questions/32358841/grouping-list-combinations-for-round-robin-tournament