nested-loops

问题 I have a for loop nested in another for loop. How can I make it so that when somethign happens in the inner loop, we exit and jump to the next iteration of the outer loop? uuu <- 0 for (i in 1:100) { uuu <- uuu + 1 j <- 1000 for (eee in 1:30) { j <- j - 1 if (j < 990) { # if j is smaller than 990 I hope start next time of i } } } 回答1: @flodel has the correct answer for this, which is to use break rather than next . Unfortunately, the example in that answer would give the same result whichever

问题 I have the following code: inputActionFile = '../action.txt' inputDaerahFile = '../daerah.txt' inputStuffFile = '../stuff.txt' inputTermsFile = '../terms.txt' outputFile = 'hasil.out' inputAction = open(inputActionFile, 'r') inputDaerah = open(inputDaerahFile, 'r') inputStuff = open(inputStuffFile, 'r') inputTerms = open(inputTermsFile, 'r') output = open(outputFile, 'w') for actionLine in inputAction: for daerahLine in inputDaerah: for stuffLine in inputStuff: for termsLine in inputTerms:

问题 I have the following code: inputActionFile = '../action.txt' inputDaerahFile = '../daerah.txt' inputStuffFile = '../stuff.txt' inputTermsFile = '../terms.txt' outputFile = 'hasil.out' inputAction = open(inputActionFile, 'r') inputDaerah = open(inputDaerahFile, 'r') inputStuff = open(inputStuffFile, 'r') inputTerms = open(inputTermsFile, 'r') output = open(outputFile, 'w') for actionLine in inputAction: for daerahLine in inputDaerah: for stuffLine in inputStuff: for termsLine in inputTerms:

问题 I wrote a program in Processing 3.5.4. It's basic structure is as follows: int SOMEINITIALSTUFF; Class[] classArrays = new Class[]; void setup() { Sets up the simulation to run; size(1200, 700); } void draw() { background(255, 200, 200); Runs Simulation; Collects data; } This runs fine. What I would like to do is run this program multiple times to gather some statistics. I can't figure out how to do this. I want to essentially put this whole code into a loop, and collect the data it creates

问题 I am trying to plot various data including complex vectors.Thanks to contributors see answers https://stackoverflow.com/a/64480659/13953414, i managed to generate the dataframes but i get stuck when i want to add some additional calculations. i get an error : df['T_depth'] = (math.sqrt(D / (4 * (math.pi) * frequency)) / 1e-6), TypeError: only size-1 arrays can be converted to Python scalars all calculations starting from T_depth are not executed due to a format issue. the function were

问题 I’m in need of some help and guidance on the design of my code. I want to run tests with multiple variables set to multiple values, without creating insane amounts of nested loops. I got a struct which holds various variables like this (only three integers as an example, but the real deal will hold a lot more, including booleans, doubles etc): struct VarHolder { int a; int b; int c; // etc.. // etc.. }; The struct get passed into a test function. bool TestFunction(const VarHolder& _varholder)

问题 Hi i am new to c++ and i made a code which runs but it is slow because of many nested for loops i want to speed it up by openmp anyone who can guide me. i tried to use ' #pragma omp parallel ' before ip loop and inside this loop i used ' #pragma omp parallel for ' before it loop but it does not works #pragma omp parallel for(int ip=0; ip !=nparticle; ip++){ inf14>>r>>xp>>yp>>zp; zp/=sqrt(gamma2); counter++; double para[7]={0,0,Vz,x0-xp,y0-yp,z0-zp,0}; if(ip>=0 && ip<=43){ #pragma omp parallel

问题 I am a beginner in R. I am working on linear programming using R studio's Cplex to solve a model. One of the constraint in my model is Xl(i,j,t) <= D(i,j,t). I am able to do this with nested for loop with a small dimension (16X16X6). But I want to run my model a lot bigger model, more like 2500X2500X60. I need to save memory and run it faster than the nested for loop. I thought about using apply but I don't know how to make it work. Any help would be greatly appreciated! location <-16 horizon

问题 for i in range(0,x): for j in range(0,y): if (i+j)%2 == 0: Think of something like tossing two dices at the same time and finding if the sum on the dices is an even number but here's the catch, a dice has 6 sides but here the two can have any number of sizes, equal and not equal even! Can anyone suggest how to merge it under one loop because I can't think of any? 回答1: You can't get rid of the nested loop (you could hide it, like by using itertool.product , but it would still be executed

问题 I have a script that loops through a series of four (or less) characters strings. For example: aaaa aaab aaac aaad If have been able to implement it with nested for loops like so: chars = string.digits + string.uppercase + string.lowercase for a in chars: print '%s' % a for b in chars: print '%s%s' % (a, b) for c in chars: print '%s%s%s' % (a, b, c) for d in chars: print '%s%s%s%s' % (a, b, c, d) Is this sort of loop nesting a bad thing, and if so, what would be a better way of accomplishing