variable-assignment

问题 I'm working on a project where i have 3 different classes creating objects CommissionEmployee, SalariedEmployee and HourlyEmployee. I need to add these to an arraylist in the main class, but not sure where i'm going wrong. public class Company { public String companyName; public SalariedEmployee owner; public ArrayList<SalariedEmployee> salariedEmployee; public ArrayList<HourlyEmployee> hourlyEmployee; public ArrayList<CommissionEmployee> commissionEmployee; public Company (String companyName

问题 I want the function getCategory() to return "invalid" , instead of printing the word "invalid" (i.e instead of using printf ) when input to the function is invalid (i.e.when either height or weight are lower then zero). please help: #include<stdio.h> #include<conio.h> char getCategory(float height,float weight) { char invalid = '\0'; float bmirange; if(height<=0 || weight<=0) return invalid; else { height=height*0.01; //1 centimeter = 0.01 meters bmirange=[weight/(height*height)]; if(bmirange

问题 I want to add a computed value to an existing vector from within a loop in which the wanted vector is called from within the loop . that is im looking for some function that is similar to assign() function but that will enable me to add values to an existing variables and not creating new variables. example: say I have 3 variabels : sp=3 for(i in 1:sp){ name<-paste("sp",i,sep="") assign(name,rnorm(5)) } and now I want to access the last value in each of the variabels, double it and add the

问题 Using C#, could I able to access a content of a variable whose name is stored in another string variable eg. string str ="ABCDEFG"; string variable = "str"; Here could i access value of string str using var???? 回答1: you probably can, but that's too complicated. Have you thought of using the Dictionary class? Dictionary<string,string> myDictionary = new Dictionary<string,string>(); myDictionary["str"] = "ABCDEF"; var valueinstr = myDictionary["str"]; 回答2: Yes you can by using reflection. var

问题 I encountered a problem when trying to connect a component to two output ports of parent hierarchy in VHDL. Since the physical connection can be done only via "port map" statement, there is no way to connect local signal to more than one output port. Here is an example: The description of the above circuit should be smth. like this: entity HIER is port ( IN1 : in bit; OUT1, OUT2 : out bit); end hier; architecture HIER_IMPL of HIER is component BUF is port (a : in bit; o : out bit); end

问题 EDIT: This turned out to be an uninitialized variable creating chaotic behavior. See this post about getting more compiler warnings for JUCE I was attempting to create a basic synthesizer and I quickly ran into an absurd problem when simply attempting to assign a value to a newly declared variable. After following along with the JUCE simple sine synthesis tutorial I ran into the problem. This is the basic code of my getNextAudioBlock() function when it is producing white noise. Note how there

问题 Essentials of Programming Languages says References are sometimes called L-values. This name reflects the association of such data structures with variables appearing on the left-hand side of assignment statements. Analogously, expressed values , such as the values of the right-hand side expressions of assignment statements, are known as R-values . while https://course.ccs.neu.edu/csg111/lectures/lec06.html from a course based on the book says References are sometimes called L-values because

问题 I want to assign multiple values or string or their combination to a postgresql variable. What I want to achieve is something like this done in DB2: STRING '(' DELIMITED BY SIZE variable_1 DELIMITED BY SPACE ' ' DELIMITED BY SIZE variable_2 DELIMITED BY SIZE variable_3 DELIMITED BY SIZE ' ) ' DELIMITED BY SIZE X'10' DELIMITED BY SIZE INTO var_string END-STRING In the same way i have some variables and string which I want to add in a variable "var_string". Is it possible? 回答1: Try CONCAT

问题 This question already has answers here : What are copy elision and return value optimization? (4 answers) Closed 5 years ago . There is a part of C++ code I don't really understand. Also I don't know where should I go to search information about it, so I decided to ask a question. #include <iostream> #include <string> using namespace std; class Test { public: Test(); Test(Test const & src); Test& operator=(const Test& rhs); Test test(); int x; }; Test::Test() { cout << "Constructor has been

问题 I want to do slice assignment in tensorflow. I got to know that I can use: my_var = my_var[4:8].assign(tf.zeros(4)) base on this link. as you see in my_var[4:8] we have specific indices 4, 8 here for slicing and then assignment. My case is different I want to do slicing based on a tensor and then do the assignment. out = tf.Variable(tf.zeros(shape=[8,4], dtype=tf.float32)) rows_tf = tf.constant ( [[1, 2, 5], [1, 2, 5], [1, 2, 5], [1, 4, 6], [1, 4, 6], [2, 3, 6], [2, 3, 6], [2, 4, 7]]) columns