reference

问题 Why is this code returning "false" instead of "true": package com.company; public class Main { public static void main(String[] args) { String fullName = "Name Lastname"; String name = "Name "; String lastName = "Lastname"; String firstNamePlusLastName = name + lastName; System.out.println(fullName == firstNamePlusLastName); } } If I remember correctly: String firstNamePlusLastName = name + lastName; Should create a String that points to an existing address in memory (String pool) because we

问题 i have three VS solutions : Human-resource Solution Payroll Solution And a Main web site (Shell); Human-resource is a solution which is also a team project. Payroll is the same, and so do the Main web Site(Shell). what i need is to reference the (Shell) in Human-resource solution and also in Payroll. is that possible in TFS ? and if so, if i modified the Shell in Human-Resource solution, is the modifications transferred automatically to the Payroll Solution ? 回答1: Yep, go to File->Source

问题 After reading this answer from ildjarn, I wrote the following example, and it looks like an unnamed temporary object has the same life time as its reference! How come this is possible? Is it specified in the C++ standard? Which version? Source code: #include <iostream> //cout #include <sstream> //ostringstream int main () { std::ostringstream oss; oss << 1234; std::string const& str = oss.str(); char const* ptr = str.c_str(); // Change the stream content oss << "_more_stuff_"; oss.str(""); /

问题 i have been trying to implement SSO using SAML in Java. for quite some time i have been referring to blogs by experts and some of the answers on your site. I wanted to know if there is a standard reference document which defines all the protocol elements and attributes of SAML request/response and guidance for their use. I have been using it according to my own convenience without following any standards simply exchanging XML messages between web applications. Thank you. 回答1: The SAML

问题 I am confused with Python referencing. Consider the following example: My task : To edit each element in the list d = { 'm': [1,2,3] } m = d['m'] m = m[1:] # m changes its reference to the new sliced list, edits m but not d (I wanted to change d) Similarly: d = { 'm': [1,2,3] } m = d['m'] m = m[0] # As per python referencing, m should be pointing to d['m'] and should have edited d In python everything goes by reference, then when is a new object created? Do we always need copy and deepcopy

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . this is really about a bad idea of swapping two references. The references are not supposed to be resetable so it is not supposed to

问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . this is really about a bad idea of swapping two references. The references are not supposed to be resetable so it is not supposed to

问题 I am unable to understand the logic behind List<int> as it breaks some of the basic rules. List<int> is supposed to be of value type and not reference type. List<int> has to be passed by ref keyword if its value has to be persisted between function calls. So this means it is displaying a value type behavior similar to int. But List<int> has to be initialized by a new operator. Also List<int> could be null as well. This implies a reference type behavior. A nullable type is different as in it

问题 Why ternary operator doesn't work with assignment by reference? $obj = new stdClass(); // Object to add $result = true; // Op result $success = array(); // Destination array for success $errors = array(); // Destination array for errors // Working $target = &$success; if(!$result) $target = &errors; array_push($target, $obj); // Not working $target = $result ? &$success : &$errors; array_push($target, $obj); 回答1: Here you go $target = ($result ? &$success : &$errors); Also your example has

问题 In my Java project, I have a vector of various types of Traders. These different types of traders are subclasses of the Trader class. Right now, I have a method that takes a Trader as an argument and stores it 50 or so times in the vector. I am having problems because storing the same object 50 times is just storing 50 references of the same object. I need to store 50 copies of the object. I've researched about implementing Clone, but I don't want the programmers defining a type of Trader to