nested-loops

问题 I have a list of lists of lists The outer most list is the entire collection of members, each list within that is the individual members, and within that is each line of the raw text file I got split up into its individual elements. Each member's record has a Name line, indicated by the "NM1" label But not every member has an "End Date" field, indicated by the 'DTP' and '349' labels Likewise not every member has an "Prior ID" field, indicated by the 'REF' and '0F' labels I want to go through

问题 I have a list of lists of lists The outer most list is the entire collection of members, each list within that is the individual members, and within that is each line of the raw text file I got split up into its individual elements. Each member's record has a Name line, indicated by the "NM1" label But not every member has an "End Date" field, indicated by the 'DTP' and '349' labels Likewise not every member has an "Prior ID" field, indicated by the 'REF' and '0F' labels I want to go through

问题 I have a python lambda with nested for loop def lambda_handler(event, context): acc_ids = json.loads(os.environ.get('ACC_ID')) with open('/tmp/newcsv.csv', mode='w', newline='') as csv_file: fieldnames = ['DomainName', 'Subject', 'Status', 'RenewalEligibility', 'InUseBy'] writer = csv.DictWriter(csv_file, fieldnames=fieldnames) writer.writeheader() for acc_id in acc_ids: try: //do something for region in regions_to_scan: try: // do something if something: for x in list: // get values for row

问题 I have a list of objects A. Each object A in this list contains list of object B and the object B contains list of Object C. The object C contains an attribute name that i want to use to filter using java 8. how to write the code below in java 8 using streams to avoid nested loop : C c1 = null; String name = "name1" for (A a: listOfAObjects) { for (B b: a.getList()) { for (C c: b.getPr()) { if (c.getName().equalsIgnoreCase(name)) { c1= c; break; } } } } 回答1: You can use two flatMap then a

问题 I have an object of objects that I am passing with vue and I am doing this to run: <ul> <li v-for="subjects in questions"> <li v-for="question in subjects"> @{{ question }} </li> </li> </ul> but I am getting this error: Property or method "subjects" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option. (found in root instance) How can I run a nested loop in vue? 回答1: Here you go with the example: var vm = new Vue({ el: '

问题 I have an object of objects that I am passing with vue and I am doing this to run: <ul> <li v-for="subjects in questions"> <li v-for="question in subjects"> @{{ question }} </li> </li> </ul> but I am getting this error: Property or method "subjects" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option. (found in root instance) How can I run a nested loop in vue? 回答1: Here you go with the example: var vm = new Vue({ el: '

问题 I have the following algorithm which I want to rewrite so it has time complexity O(n). I am new to algorithms but from my understanding since the two for loops both do a multiple of n iterations, the complexity will always be O(n 2 ). Is it even possible to reduce the complexity of this? Algorithm example(ArrayA, ArrayB, n) Input: 2 arrays of integers, ArrayA and ArrayB, both length n Output: integer value <- 0 1 operation for i <- 0 to n-1 n-1 operations for j <- 0 to n-1 (n-1)^2 operations

问题 I have a nested loop with 60 dimensions, i.e. I nest 60 loops into each other. In Stata the MWE would look like the following: forvalues i = 1/60 { forvalues j = 1/60 { forvalues k = 1/60 { forvalues l = 1/60 { ... imagine the 56 remaining loops here } } } } The equivalent in R is: for(i in 1:60) { for(j in 1:60) { for(k in 1:60) { for(l in 1:60) { ... imagine the 56 remaining loops here } } } } The objective here is to avoid typing all 60 levels into my code and create a loop for the loop

问题 I have a nested loop with 60 dimensions, i.e. I nest 60 loops into each other. In Stata the MWE would look like the following: forvalues i = 1/60 { forvalues j = 1/60 { forvalues k = 1/60 { forvalues l = 1/60 { ... imagine the 56 remaining loops here } } } } The equivalent in R is: for(i in 1:60) { for(j in 1:60) { for(k in 1:60) { for(l in 1:60) { ... imagine the 56 remaining loops here } } } } The objective here is to avoid typing all 60 levels into my code and create a loop for the loop

问题 I am trying to get all combinations of an array with C++ such that double* list1 = new double[size]; Items in that array is {1,2,3,4,5} I need to add all possible combinations into a stack, such as: 1+2, 1+2+3, 1+2+3+4，1+2+3+4+5, 1+3, 1+3+4, 1+3+4+5, 1+4, 1+4+5, 1+5... the problem I am running into is I am doing this through 2 for loops and a while loop for(int i = 0; i < size - 1; i++) { for(int j = i; j < size - 1; j++) { double temp = list1[i] + list1[j + 1]; list1combos.push(temp); int k