variables

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

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

问题 What's the best way to store a variable that can be used throughout a .JSP website? I have a keycode that is a bunch of numbers keycode = XXXXXXXXXXXXXXXXXXXXX and I want to be able to access that code in various pages while having the keycode live in one location. The variable doesn't change often but I'd like to be able to just swap it out in one place and not everywhere it's referenced. 回答1: To store a variable in application scope, you should save it as an attribute in ServletContext. You

问题 What's the best way to store a variable that can be used throughout a .JSP website? I have a keycode that is a bunch of numbers keycode = XXXXXXXXXXXXXXXXXXXXX and I want to be able to access that code in various pages while having the keycode live in one location. The variable doesn't change often but I'd like to be able to just swap it out in one place and not everywhere it's referenced. 回答1: To store a variable in application scope, you should save it as an attribute in ServletContext. You

问题 In JavaScript, it is possible to declare multiple variables like this: var variable1 = "Hello, World!"; var variable2 = "Testing..."; var variable3 = 42; ...or like this: var variable1 = "Hello, World!", variable2 = "Testing...", variable3 = 42; Is one method better/faster than the other? 回答1: The first way is easier to maintain. Each declaration is a single statement on a single line, so you can easily add, remove, and reorder the declarations. With the second way, it is annoying to remove

问题 I am writing a code where I need to arrays defined as u1,u2,u3. I require that number of variables defined are dictated by the user. for example if the user enters an integer value of "7". Then the variables defined are u1,u2,u3,u4,u5,u6,u7. So the variable names for the arrays are being defined by what value the user enters. 回答1: From the description of your problem, you simply want an allocatable array. TYPE(whatever), ALLOCATABLE :: u(:) INTEGER :: some_number PRINT *, 'Enter the number of

问题 I am writing a code where I need to arrays defined as u1,u2,u3. I require that number of variables defined are dictated by the user. for example if the user enters an integer value of "7". Then the variables defined are u1,u2,u3,u4,u5,u6,u7. So the variable names for the arrays are being defined by what value the user enters. 回答1: From the description of your problem, you simply want an allocatable array. TYPE(whatever), ALLOCATABLE :: u(:) INTEGER :: some_number PRINT *, 'Enter the number of

问题 For general classes manipulation understanding; given the following use case : class Child1 def process var 'child1' + var end end class Child2 def process var 'child1' + var end end class Child3 def process var 'child3' + var end end ... class Master attr_reader :var def initialize(var) @var = var end def process [ Child1.new.process(var), Child2.new.process(var), Child3.new.process(var) ] end end by some kind of inheritance or structure, would there be a way to have var available to all

问题 For general classes manipulation understanding; given the following use case : class Child1 def process var 'child1' + var end end class Child2 def process var 'child1' + var end end class Child3 def process var 'child3' + var end end ... class Master attr_reader :var def initialize(var) @var = var end def process [ Child1.new.process(var), Child2.new.process(var), Child3.new.process(var) ] end end by some kind of inheritance or structure, would there be a way to have var available to all

问题 For general classes manipulation understanding; given the following use case : class Child1 def process var 'child1' + var end end class Child2 def process var 'child1' + var end end class Child3 def process var 'child3' + var end end ... class Master attr_reader :var def initialize(var) @var = var end def process [ Child1.new.process(var), Child2.new.process(var), Child3.new.process(var) ] end end by some kind of inheritance or structure, would there be a way to have var available to all