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  • Building big, immutable objects without constructors having long parameter lists

    - by Malax
    Hi StackOverflow! I have some big (more than 3 fields) Objects which can and should be immutable. Every time I run into that case i tend to create constructor abominations with long parameter lists. It doesn't feel right, is hard to use and readability suffers. It is even worse if the fields are some sort of collection type like lists. A simple addSibling(S s) would ease the object creation so much but renders the object mutable. What do you guys use in such cases? I'm on Scala and Java, but i think the problem is language agnostic as long as the language is object oriented. Solutions I can think of: "Constructor abominations with long parameter lists" The Builder Pattern Thanks for your input!

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  • Building big, immutable objects without using constructors having long parameter lists

    - by Malax
    Hi StackOverflow! I have some big (more than 3 fields) Objects which can and should be immutable. Every time I run into that case i tend to create constructor abominations with long parameter lists. It doesn't feel right, is hard to use and readability suffers. It is even worse if the fields are some sort of collection type like lists. A simple addSibling(S s) would ease the object creation so much but renders the object mutable. What do you guys use in such cases? I'm on Scala and Java, but i think the problem is language agnostic as long as the language is object oriented. Solutions I can think of: "Constructor abominations with long parameter lists" The Builder Pattern Thanks for your input!

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  • How to solve this problem with lists?

    - by osabri
    what i don't understand in my task here what kind of list i can use, and if it should have 2 attributes key and value ? or only value? with pointers to another node ofc the task: "design a function which create a list using input from the keyboard _ the prefered solution. Assume that some magic stops the input; so the length of a list is not known in advance.(alternative solution: a function which creates explicitly a fixed list. However, all other function can not assume any knowledge about the length of lists). Necessary utilities( additional functions to be created): a function which deallocates the memory used for lists and a function which prints the content of the list. let the element of lists contain a letter. Design a function which create a copy of such list. can't also understand the list line !!!!!???

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  • Where are graphically pleasing examples of Lists

    - by slim
    Anyone know of good code examples of how to make lists look different than your everyday average black list or more graphically pleasing than you usually see in android apps. I've looked through google code but haven't found too many. I'm looking for different and eye catching lists. I hope this question isn't too generic. Also i'm open to anything, code, examples, blog posts, etc, you name it. I've really struggled with lists and making them look more snazzy. I'm talking more the code level not the graphics or icons used.

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  • How should I synchronize lists in WCF?

    - by mafutrct
    I've got a WCF service that offers multiple lists of items of different types. The lists can be changed on the server. Every change has to be published to all clients to make sure every client has an up-to-date copy of each server list. Currently I'm using this strategy: On login, every client receives the current status of every list. On every change, the added or removed item is sent to all clients. The drawback is that I have to create a callback for every list, since the items are of different types. Is there a pattern I could apply? Or do I really have to duplicate code for each of the lists?

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  • Join data from two Lists into one object

    - by Petr Mensik
    I ran into following situation and I am wondering about best solution. Let's say I have List<Object1> and List<Object2>, these lists are result of two separated queries. Both of them have the same size and there is relationship 1:1 between elements in the lists based on ID. I know that best solution would be fetching data in one DB query but that's possible right now. So my question is, what is the best way to join these lists into let's say List<Object3>?

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  • Linq: the linked objects are null, why?

    - by user46503
    Hello, I have several linked tables (entities). I'm trying to get the entities using the following linq: ObjectQuery<Location> locations = context.Location; ObjectQuery<ProductPrice> productPrice = context.ProductPrice; ObjectQuery<Product> products = context.Product; IQueryable<ProductPrice> res1 = from pp in productPrice join loc in locations on pp.Location equals loc join prod in products on pp.Product equals prod where prod.Title.ToLower().IndexOf(Word.ToLower()) > -1 select pp; This query returns 2 records, ProductPrice objects that have linked object Location and Product but they are null and I cannot understand why. If I try to fill them in the linq as below: res = from pp in productPrice join loc in locations on pp.Location equals loc join prod in products on pp.Product equals prod where prod.Title.ToLower().IndexOf(Word.ToLower()) > -1 select new ProductPrice { ProductPriceId = pp.ProductPriceId, Product = prod }; I have the exception "The entity or complex type 'PBExplorerData.ProductPrice' cannot be constructed in a LINQ to Entities query" Could someone please explain me what happens and what I need to do? Thanks

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  • Remove duplicates in a linked list before adding - C

    - by DesperateCoders
    Hi, My question is about removing duplicates from a linked list. But i want to do it before adding to linked list. struct myStr{int number; mystr *next;} void append(mystr **q,int item) { myStr *temp; temp = *q; myStr *newone; if(*q==NULL)// There should be control of previous elements. Call of keysearch function. { temp = (myStr *)malloc(sizeof(myStr)); temp->number =size; temp->next=NULL; *q=temp; } else //And also here { temp = *q; while(temp->next !=NULL) { temp=temp->next; } newone = (myStr *)malloc(sizeof(myStr)); newone->count = size; newone->next=NULL; temp->next=newone; } } int keysearch (myStr *p) { struct myStr *temp = p; int found = 0; int key= p->number; while (temp->number != NULL) { if(temp->number == key) { found = 1; } temp = temp->next; } return found; } My problem is in keySearch. I don't know what is wrong? Or is there another way for doing this.

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  • Setting up dynamic DNS for linked router

    - by cherrun
    I have a 'main' router that receives the internet signal from the ISP and another one in my room, connected with a cable. The main router is running its original firmware and is very limited in its features, unfortunately I can not change this router, since my phone company has some hardcoded stuff in there and the internet will only work with this router. My second router is running DD-WRT firmware. Now I need to set up dynamic DNS, so I can access my NAS machine remotely, which is connected to the second router. As mentioned, this can't be done with the main router, due to its limited features. DHCP is turned off on the second router, since it gets its IP from the main one. Is there a possibility to set up dynamic DNS on the second router, without changing any (or much) on the main router? Maybe as a side note: I live in Germany, don't know if the set up of the routers are different in other countries.

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  • Setting up dynamic DNS for linked router

    - by cherrun
    I have a 'main' router that receives the internet signal from the ISP and another one in my room, connected with a cable. The main router is running its original firmware and is very limited in its features, unfortunately I can not change this router, since my phone company has some hardcoded stuff in there and the internet will only work with this router. My second router is running DD-WRT firmware. Now I need to set up dynamic DNS, so I can access my NAS machine remotely, which is connected to the second router. As mentioned, this can't be done with the main router, due to its limited features. DHCP is turned off on the second router, since it gets its IP from the main one. Is there a possibility to set up dynamic DNS on the second router, without changing any (or much) on the main router? Maybe as a side note: I live in Germany, don't know if the set up of the routers are different in other countries.

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  • Linked vSphere servers preventing cloning?

    - by brian
    I've currently got a pair of vSphere5 standard servers (physical, not VAs) managing about a hundred ESX 4.1 and 5 hosts in two different physical and logical datacenters. With our last purchase, we bought another vSphere license for the new vS server. I unmanaged all the ESX servers in one datacenter and added them to new vSphere server. Our previous single-vS-server layout used to be: -vSphere1 --Datacenter1 (where the physical ESX host was located) ---Folder ----ESX server1 --Datacenter2 ---Folder ----ESX server2 Now it looks like -vSphere1 --Datacenter1 ---Folder ----ESX server1 -vSphere2 (new vSphere server) --Datacenter2 ---Folder ----ESX server2 ESX server2 was removed from vSphere1's inventory and added to vSphere2's, so it is now managed by vSphere2. This is nice and all, as no vSphere <-- ESX management traffic leaves the physical datacenter, except for one huge oversight: when I go to clone a VM, the opposite vSphere server (and thus other datacenter) does not show up in the list on the first page of the wizard. Is this a bug, a license limitation, or is it just simply not possible to clone a VM from an ESX box managed by one vS server to another ESX box managed by a /different/ vS server?

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  • IE won't load directly-linked PNGs

    - by Johannes Rössel
    I remember having this issue in the past with previous versions as well but recently it started here again. Whenever I click a link that links directly to a PNG image I get a download dialog; the browser won't display it on its own. Inline PNGs are fine, though. Any ideas what causes this? It did work in the past. Preemptive warning: I'm not looking for advice to change my browser; I'm looking for a solution to a specific problem with one piece of software. Just ignore the fact that it may have religious importance.

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  • MySQL fault linked to windows shutdown failure?

    - by Roy
    As far as i understand my computer is experiencing a strange coincidence (hopefully it isn't and somebody can enlighten me). Basically i shut down my laptop (Windows 7) (at 17.20, today, to be precise) successfully (and so also did XAMPP and its included components). However upon starting my laptop up again in the last hour i noticed that the MySQL module service in my xampp control panel was not coming on (just a big red tick; incidentally everything else was working fine). Now, i had the exact same problem about two weeks ago, whereby i just reinstalled xampp and got it working again. But rather than doing this straight away i thought i would just restart my laptop first. However it won't restart (or shut down first) to be precise now. I can remember Windows wasn't shutting down properly the last time it happened (about two weeks ago). Just wondered if this coincidence pointed to any specific diagnostic as regards the problem with MYSQL? If so i would appreciate greatly any help. Otherwise sorry for wasting your time.

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  • File descriptor linked to socket or pipe in proc

    - by primero
    i have a question regarding the file descriptors and their linkage in the proc file system. I've observed that if i list the file descriptors of a certain process from proc ls -la /proc/1234/fd i get the following output: lr-x------ 1 root root 64 Sep 13 07:12 0 -> /dev/null l-wx------ 1 root root 64 Sep 13 07:12 1 -> /dev/null l-wx------ 1 root root 64 Sep 13 07:12 2 -> /dev/null lr-x------ 1 root root 64 Sep 13 07:12 3 -> pipe:[2744159739] l-wx------ 1 root root 64 Sep 13 07:12 4 -> pipe:[2744159739] lrwx------ 1 root root 64 Sep 13 07:12 5 -> socket:[2744160313] lrwx------ 1 root root 64 Sep 13 07:12 6 -> /var/lib/log/some.log I get the meaning of a file descriptor and i understand from my example the file descriptors 0 1 2 and 6, they are tied to physical resources on my computer, and also i guess 5 is connected to some resource on the network(because of the socket), but what i don't understand is the meaning of the numbers in the brackets. Do the point to some property of the resource? Also why are some of the links broken? And lastly as long as I asked a question already :) what is pipe?

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  • How do I extract data from a FoxPro memo field using .NET?

    - by Madhu kiran
    Hi, I'm writing a C# program to get FoxPro database into datatable everything works except the memo field is blank or some strange character. I'm using C# .Net 2.0. I tried the code posted by Jonathan Demarks dated Jan 12. I am able to get the index but i don't know how to use this index to fetch the data from memo file. Pleaese help me. Thanks Madhu

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  • How to get Value of dropdown to other page populated using ajax?

    - by Chintan
    Hello Programming Experts, To Nik, I am facing same problem.I am generating two dropdown using ajax. But I can't access value of those dropdowns to another page. i cannot understand this code..what should i do to get value from those dropdowns....Where should i put this function? Plz reply me at [email protected] php page is like this $result = mysql_query($sql); echo''; while($row = mysql_fetch_array($result)) { echo ''.$row['lname'].' '; } echo''; Thanks Chintan

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  • Word 2010 Style Sets and Multilevel Lists

    - by Stevia
    In Word 2010, how can you create quick style sets that include multilevel lists (include being the operative word)? As background, I have created a set of styles for a long agreement form and assigned them to levels in a certain custom multilevel list. I then also saved those styles as a quick style set called Long Agreement. I have saved those styles in my normal template. That all works fine for assigning styles to a Long Agreement. What I'd like to do next is create a second style set called Short Agreement. I will assign certain styles to that style set. The issue is that I don't see how to tie a different custom multilevel list to those Short Agreement styles. When I click on Change Styles, Short Agreement [style set], and I apply those styles, how can I get it to automatically use the multilevel list that I assign to short agreements?

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  • Word 2010 Style Sets and Multilevel Lists

    - by Stevia
    In Word 2010, how can you create quick style sets that include multilevel lists (include being the operative word)? As background, I have created a set of styles for a long agreement form and assigned them to levels in a certain custom multilevel list. I then also saved those styles as a quick style set called Long Agreement. I have saved those styles in my normal template. That all works fine for assigning styles to a Long Agreement. What I'd like to do next is create a second style set called Short Agreement. I will assign certain styles to that style set. The issue is that I don't see how to tie a different custom multilevel list to those Short Agreement styles. When I click on Change Styles, Short Agreement [style set], and I apply those styles, how can I get it to automatically use the multilevel list that I assign to short agreements?

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  • problem with linked libraries or classes??

    - by hemant
    i recently finished one project..now when i create a new navigation project in xcode and try to run it in simulator the application crashes and error in debugger window shows that i am missing some classes which i had used in my previous project(not in this one) and in some cases it gives Couldn't register com.yourcompany.GuessGame with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger. is this some problem related to linked libraries??

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