# Tag combinations

## [Solved] All combination with JS [closed]

So you want to generate all permutations from size = 1 to size = N? Stack Overflow user Andy Carson has created a JavaScript library with a permutation generator function that lets you specify size. See: GitHub / acarl005 /…

## [Solved] Different combinations of an array (C#)

static void Main() { var cnk = comb(new [] {1,2,3},2); foreach ( var c in cnk) { } } public static IEnumerable<int[]> comb(int[] a, int k) { if (a == null || a.Length == 0 || k < 1 ||…

## [Solved] combinations program help in python [closed]

Alright I’ve done the hard part hoping you can finish it up: tmp = [] def recal(_list): n = [] if ‘-‘ in _list: for i in 0,1: t = _list[:] t[t.index(‘-‘)] = i n.append(recall(t)) else: tmp.append(l) return l recall([‘-‘,’-‘,’0′,’1’])…

## [Solved] How can I create a method of finding the total number of possible combinations using a dynamic format [closed]

I being a number, there is 10 possibilities. S being a character, there is 26 possibilities. The total number of combinations is 10 power (TheNumberOfI) * 26 power (TheNumberOfS) This can be dynamically solved using a simple function that counts…

## [Solved] Python create list combination

You haven’t specified in what order the keys of the dictionary should be processed in the output. If one assumes reverse sorting order, you can do this trivially with itertools.product(): from itertools import product combinations = product(*([‘{0}{1}’.format(v, i) for i…

## [Solved] How to get summation of i ∈∑ nCr where ( a

Use the hockey stick rule bCr + (b-1)Cr + (b-2)Cr + …. + aCr = bCr + (b-1)Cr + (b-2)Cr + …. + rCr – ((a-1)Cr+(a-2)Cr+…+rCr) = (b+1)C(r+1)-aC(r+1) For example, 6+10+15=4C2+5C2+6C2=7C3-4C3=35-4 solved How to get summation of i ∈∑ nCr…

## [Solved] addition of combinations of two-dimensional array list

Here’s what I’ve got, took me a while but this will do what I was looking for: it takes each combination of the arrays (t1, t2, t3, t4) and adds their elements and returns whatever combinatorial you choose for n,…

## [Solved] Efficient Way to specific combinations from string [closed]

First thing you need to explode the string by _ \$str=”one_two_three_four_five_six”; \$array = explode(‘_’, \$str); Add an empty array to store result there \$result = []; Define a recursive function that takes an array, implode array values, remove last element…

## [Solved] nCr mod 10^9 + 7 for n

n is large while r is small, you are better off compute nCr by n(n-1)…(n-r+1)/(1*2*…*r) You may need to find multiplicate inverse of 1, 2, … r mod 10^9+7 solved nCr mod 10^9 + 7 for n

## [Solved] List Combinations c#

Visual Studio was taking too long to load, so I did it in JavaScript since I could test in my console. This will print out all the choices. (Also it sounds more like a “what’s the algorithm for this?” not…

## [Solved] How to randomly pick a number of combinations from all the combinations efficiently

If you have F unique first names and L unique last names, then overall number of combinations is N = F * L So you can generate needed number of non-repeating random integer values in range 0..N-1 (for example, with…

## [Solved] Combination formula “n! / ((n-k)!*k!)” doesn’t work [closed]

This line: result = n! / ((n-k)!*k!); …is not valid C code. ! in C means “not”. You will need to provide a factorial function so that you can call: result = factorial(n) / (factorial(n-k) * factorial(k)); solved Combination formula…

## [Solved] Getting all possible combination for [1,0] with length 3 [0,0,0] to [1,1,1]

You’re looking for a Cartesian product, not a combination or permutation of [0, 1]. For that, you can use itertools.product. from itertools import product items = [0, 1] for item in product(items, repeat=3): print(item) This produces the output you’re looking…

## [Solved] Make all combination from 3 text file in PHP

Patrick, I’m not sure this is the best way to do this, it does what you want but again I’m not really sure if using 3 consecutive loops is good practice. In real world environment, your txts files may contain…

## [Solved] how do I generate set of all tokens of length exactly equal to 8

You caught me on a day where I don’t want to do what I’m supposed to be doing1. The code below only generates token output; it doesn’t attempt to store tokens anywhere. You can redirect the output to a file,…