variables

问题 I want to ask you how to declare a variable that can be used by every method? I tried making the method's access type public but that didn't let me used its variable across other methods Moreover, I basically want to accumulate that variable with different values across different methods that's why I am asking this. NOTE: I want to avoid making any static classes. EDIT: For example, I did public decimal MiscMethod() { decimal value1 += 23m; } public decimal AutoMethod() { decimal value 1 +=

问题 Hi I want pass antwoord to opleidingArray.forEach(haalScoresOp, antwoord); So I can use it in the HaalScoresOp function. I cannot get this to work. I also tried binding but this does not function. I am getting antwoord is not defined as an error. var antwoordenPerVraag = [2,1,3]; console.log(VragenEnScores.vragen[0].opleidingen[0]); antwoordenPerVraag.forEach(berekenEindresultaten); function berekenEindresultaten(item, index) { var opleidingArray = VragenEnScores.vragen[index].opleidingen;

问题 Essentially, I'd love to be able to define a variable as one thing unless that thing doesn't exist. I swear that somewhere I saw a shorthand conditional that looked something like this: $var=$_GET["var"] || "default"; But I can't find any documentation to do this right, and honestly it might have been JS or ASP or something where I saw it. I understand that all that should be happening in the above code is just to check if either statement returns true. But I thought I saw someone do

问题 Essentially, I'd love to be able to define a variable as one thing unless that thing doesn't exist. I swear that somewhere I saw a shorthand conditional that looked something like this: $var=$_GET["var"] || "default"; But I can't find any documentation to do this right, and honestly it might have been JS or ASP or something where I saw it. I understand that all that should be happening in the above code is just to check if either statement returns true. But I thought I saw someone do

问题 I am trying to learn C, and I wonder why this doesn't work? #include <stdio.h> int main(int argc, char *argv[]) { char testvar[] = argv[0]; //do something with testvar return 0; } 回答1: You could do this instead: char *testvar = argv[0]; Or maybe: char *testvar = strdup(argv[0]); /* Remember to free later. */ As pmg notes, strdup isn't standard. Implementing it using malloc + memcpy is a nice exercise. Or even: char testvar[LENGTH]; if (strlen(argv[0]) >= LENGTH) fprintf(stderr, "%s is too

问题 I'm trying to debug someone else's SQL reports and have placed the underlying reports query into a query windows of SQL 2012. One of the parameters the report asks for is a list of integers. This is achieved on the report through a multi-select drop down box. The report's underlying query uses this integer list in the where clause e.g. select * from TabA where TabA.ID in (@listOfIDs) I don't want to modify the query I'm debugging but I can't figure out how to create a variable on the SQL

问题 I'm trying to debug someone else's SQL reports and have placed the underlying reports query into a query windows of SQL 2012. One of the parameters the report asks for is a list of integers. This is achieved on the report through a multi-select drop down box. The report's underlying query uses this integer list in the where clause e.g. select * from TabA where TabA.ID in (@listOfIDs) I don't want to modify the query I'm debugging but I can't figure out how to create a variable on the SQL

问题 I've got two lists of lists, I match them and print any differences. The two lists are cable connections within a FPGA station. I need to ensure: All the connections on the $list1 exist on $list2 , if not, it should save the error on another list All the connections on $list2 exist on $list1 , so I don't get any 'wrong' connections. Any connections that don't exist on either list should be saved onto another variable. The lists are in this format: {{A.B2} {B.B3}} and the the $list2 equivalent

问题 I've got two lists of lists, I match them and print any differences. The two lists are cable connections within a FPGA station. I need to ensure: All the connections on the $list1 exist on $list2 , if not, it should save the error on another list All the connections on $list2 exist on $list1 , so I don't get any 'wrong' connections. Any connections that don't exist on either list should be saved onto another variable. The lists are in this format: {{A.B2} {B.B3}} and the the $list2 equivalent

问题 Hi want to create a new variable/column (WHRcat) by 2 variables (WHR and sexe) under a certain condition wth dyplr, mutate and case_when. Data: WHR sexe WHRcat (new variable) 1.5 1 2.8 2 0.2 2 0.3 1 1.1 1 My code: test<- test%>% mutate(WHRcat = case_when((WHR >= 1.02 & sexe = 1) ~ 1, (WHR < 1.02 & sexe = 1) ~ 2, (WHR >= 0.85 & sexe = 2) ~ 3, (WHR < 0.85 & sexe = 2) ~ 4, TRUE ~ 0)) Though doesnt work. Error: > test<- test%>% mutate(WHRcat = case_when((WHR >= 1.02 & sexe = 1) ~ 1, + (WHR < 1.02