reference

问题 I need help on how to correctly add assembly in C# code. I start a blank project and trying to run the simple code below. but has referencing errors. I know by default system.dll is included under the references folder. so why is it still complain that "'System.Configuration is not been referenced"? Am I missing some manual steps? If so how do I do it? using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Net

问题 For those experienced with C, this will be a simple memory allocation/referencing problem: Here are my data structures: struct configsection { char *name; unsigned int numopts; configoption *options; }; typedef struct configsection configsection; struct configfile { unsigned int numsections; configsection *sections; }; typedef struct configfile configfile; Here are my routines for initializing a configsection or configfile, and for adding a configsection to a configfile: // Initialize a

问题 So I am having a discussion with a friend about reference and pointers. What we got talking about is "you can take an address of a pointer but you cant take an address of a reference" And I disagree on that point. lets take an example: int x = 0; int &xRef = x; cout << &xRef << &x <<endl; this example shows the same address, but never the less ain't I taking the address of xRef by doing &xRef . Couldn't you argue that we have 2 variables with the same address, so even though I am taking the

问题 Will "form" and "form.errorProcessor" just hold single references to each other and have only 2 objects in memory, or is this a leak / problem situation? var ErrorProcessor = function(form){ this.form = form; // Problem Line } var form = $("form"); form.errorProcessor = new ErrorProcessor(form); // Some element assignment Post the problem line, I have an object hierarchy as below [checked by console.log(form)] form: {errorProcessor: {form: {errorProcessor: {form: {errorProcessor: {...}}}}}}

问题 A question about python deepcopy and shallow copy. the post at What is the difference between a deep copy and a shallow copy? cannot help me. why e.g. 1 's sum is 6 not 10 ? e.g.1 : kvps = { '1' : 1, '2' : 2 } theCopy = kvps.copy() # both point to the same mem location ? kvps['1'] = 5 sum = kvps['1'] + theCopy['1'] print sum output sum is 6 e.g.2 : aList = [1,2] bList = [3,4] kvps = { '1' : aList, '2' : bList } theCopy = kvps.copy() # both point to the same mem location ? kvps['1'][0] = 5 sum

问题 Take a look to this code, and help me to understand the result $x = array('hello', 'beautiful', 'world'); $y = array('bye bye','world', 'harsh'); foreach ($x as $n => &$v) { } $v = "DONT CHANGE!"; foreach ($y as $n => $v){ } print_r($x); die; It prints: Array ( [0] => hello [1] => beautiful [2] => harsh ) Why it changes the LAST element of the $x? it just dont follow any logic! 回答1: After this loop is executed: foreach ($x as $n => &$v) { } $v ends up as a reference to $x[2] . Whatever you

问题 I'd really like to know if there is a possibility to pass a reference of a python list to a boost::python c++ dll. What I want to achieve is that I have a list in python which can be read in c++ at any time. Let's say you'd have a variable in C++ that holds the reference to the list. Is there any way to do this? So far I only found the ctypes in python where I can make references of primitive c types, which in this case, doesn't help. I am happy for any suggestions or workarounds (a simple

问题 In C#, I have noticed that if I am running a foreach loop on a LINQ generated IEnumerable<T> collection and try to modify the contents of each T element, my modifications are not persistent. On the other hand, if I apply the ToArray() or ToList() method when creating my collection, modification of the individual elements in the foreach loop are persistent. I suspect that this is in some way related to deferred execution, but exactly how is not entirely obvious to me. I would really appreciate

问题 I have two rails active record classes, School and Instructor linked by a has_and_belongs_to_many relationship. I need to query my instructors_controller for instructors for a particular school and return an xml format response. Therefore, in the index method I have this code fragment: school = School.find(params[:school_id]) @instructors = school.instructors and later: respond_to do |format| format.html # index.html.erb format.xml { render :xml => @instructors } format.json { render :json =>

问题 How can I forbid dll class library to be referenced in other solutions? 回答1: You could look into adding a StrongNameIdentityPermission to your class library that matches the strong name of the program you do want to be able to use it with. Alternatively, you could explore using InternalsVisibleToAttribute, although it may require some design changes in your library code. This should work as long as neither assembly is signed, or both are signed with a strong name. The argument specified on