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  • Convert an array of primitive longs into a List of Longs

    - by CaptainAwesomePants
    This may be a bit of an easy, headesk sort of question, but my first attempt surprisingly completely failed to work. I wanted to take an array of primitive longs and turn it into a list, which I attempted to do like this: long[] input = someAPI.getSomeLongs(); List<Long> = Arrays.asList(input); //Total failure to even compile! What's the right way to do this?

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  • Why does this C++ code result in a segmentation fault?

    - by user69514
    I keep getting a segmentation fault when the readAuthor() method is called. Does anybody know why this happens? I am supposed to use dynamic arrays, I know this would be so easy if I was using static array. #include <iostream> #include <string> #include <cstring> #include <cstdlib> using namespace std; /** declare arrays **/ int* isbnArr = new int[25]; char* authorArr = new char[25]; char* publisherArr = new char[25]; char* titleArr = new char[25]; int* editionArr = new int[25]; int* yearArr = new int[25]; int* pagesArr = new int[25]; float* retailPriceArr = new float[25]; float* discountedPriceArr = new float[25]; int* stockArr = new int[25]; /** function prototypes **/ int readIsbn(); char* readAuthor(); char* readPublisher(); char* readTitle(); int readEdition(); int readYear(); int readPages(); float readMsrp(); float readDiscountedPrice(); int readStockAmount(); void readonebook(int* isbn, char* author, char* title, char* publisher, int* edition, int* year, int* pages, float* msrp, float* discounted, int* inventory); int main() { bool stop = false; //flag when to stop loop int ind = 0; //index for current book while( !stop ){ cout << "Add book: press A: "; cout << "another thing here "; char choice; cin >> choice; if( choice == 'a' || choice == 'A' ){ readonebook(&isbnArr[ind], &authorArr[ind], &titleArr[ind], &publisherArr[ind], &editionArr[ind], &yearArr[ind], &pagesArr[ind], &retailPriceArr[ind], &discountedPriceArr[ind], &stockArr[ind]); test(&authorArr[ind]); ind++; } } return 0; } /** define functions **/ int readIsbn(){ int isbn; cout << "ISBN: "; cin >> isbn; return isbn; } char* readAuthor(){ char* author; cout << "Author: "; cin >> author; return author; } char* readPublisher(){ char* publisher = NULL; cout << "Publisher: "; cin >> publisher; return publisher; } char* readTitle(){ char* title = NULL; cout << "Title: "; cin >> title; return title; } int readEdition(){ int edition; cout << "Edition: "; cin >> edition; return edition; } int readYear(){ int year; cout << "Year: "; cin >> year; return year; } int readPages(){ int pages; cout << "Pages: "; cin >> pages; return pages; } float readMsrp(){ float price; cout << "Retail Price: "; cin >> price; return price; } float readDiscountedPrice(){ float price; cout << "Discounted Price: "; cin >> price; return price; } int readStockAmount(){ int amount; cout << "Stock Amount: "; cin >> amount; return amount; } void readonebook(int* isbn, char* author, char* title, char* publisher, int* edition, int* year, int* pages, float* msrp, float* discounted, int* inventory){ *isbn = readIsbn(); author = readAuthor(); title = readTitle(); publisher = readPublisher(); *edition = readEdition(); *year = readYear(); *pages = readPages(); *msrp = readMsrp(); *discounted = readDiscountedPrice(); *inventory = readStockAmount(); }

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  • C++: Pass array created in the function call line

    - by Jarx
    How can I achieve a result like somebody would expect it according to the following code example: // assuming: void myFunction( int* arr ); myFunction( [ 123, 456, 789 ] ); // as syntactical sugar for... int values[] = { 123, 456, 789 }; myFunction( values ); The syntax I thought would work spit out a compile error. How can I define an argument array directly in the line where the function is called?

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  • Loop over array and set all vars to false or true in javascript

    - by Sixfoot Studio
    Hi All, I need to loop over my array and set all the vars to false or true. I have tried numerous options, none of which are working and it's clearly my lack of javascript syntax knowledge..Please take a look at this: var closeAllCells = [IncomeOpen = "false", RehabOpen = "false", AttendantCareOpen = "false", HomeMaintenanceOpen = "false", DependantCareOpen = "false", IndexationOpen = "false", DeathFuneralOpen = "false", ComprehensiveOpen = "false", CollisionOpen = "false", LiabilityOpen = "false", DCPDOpen = "false"]; So my thinking is that I can just loop over this as follows for (var i=0;i<closeAllCells.length;i++) { closeAllCells[i] = true; // or false if I wished }

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  • MIN array function non zeros only

    - by user1717622
    I have been trying to get this array function to output (non-zero) minimum values in the 'FINAL DATA' AE column. Can you see a structural error in this formula? =IF($C$4="All EMEA", MIN(IF('FINAL DATA'!$2:$AE$250000<>0, ('FINAL DATA'!$J$2:$J$250000=$C$4)*('FINAL DATA'!$E$2:$E$250000=$E$4)*( 'FINAL DATA'!$AE$2:$AE$250000))), MIN(IF('FINAL DATA'!$AE$2:$AE$250000<>0, ('FINAL DATA'!$K$2:$K$250000=$C$4)*('FINAL DATA'!$E$2:$E$250000=$E$4)*( 'FINAL DATA'!$AE$2:$AE$250000))) )

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  • convert a class to byte array + C#

    - by Newbie
    How can I convert a Class to byte array in C#. This is a managed one so the following code is failing int objsize = System.Runtime.InteropServices.Marshal.SizeOf(objTimeSeries3D); byte[] arr = new byte[objsize]; IntPtr buff = System.Runtime.InteropServices.Marshal.AllocHGlobal(objsize); System.Runtime.InteropServices.Marshal.StructureToPtr(objTimeSeries3D, buff, true); System.Runtime.InteropServices.Marshal.Copy(buff, arr, 0, objsize); System.Runtime.InteropServices.Marshal.FreeHGlobal(buff); Thanks

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  • List<MyClass*> & array question

    - by Nano HE
    Hi, Assuming a definition like this, list<MyCommand*> subList ... MyCommand* pCmd = (MyCommand*)(m_treeSM.GetItemData(node)); I tried these statements below, but failed. pCmd->subList[2] (pCmd->subList)[2] How can I get the array member values(such as subList[2]). I want to replace the value of subList[2] with other same type value. Thank you.

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  • how to loop through an array of vectors in C#

    - by Robert
    Hello everyone,I now have an array of vectors: static Vector3[] axes = new Vector3[] { Vector3.UnitX, Vector3.UnitY, Vector3.UnitZ }; and I want to loop through it,the code I write is: for(int i=0;i<axes.Length;i++) { do sth. about axes[i]; } However,it doesnt work and gets into infinite loop,could anyone help? thx.

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  • String array definition in JAVA

    - by Mohamed KALLEL
    Is it possible to define array in this way in JAVA, otherwise are there an alternative close this definition? private final int CONST_0= 0; private final int CONST_1= 1; private final int CONST_2= 2; private final int CONST_3= 3; private final String[] CONST_TXTRECORDS = new String[] {[CONST_0] = "test0", {[CONST_1] = "test1", {[CONST_2] = "test2", {[CONST_3] = "test3"};

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  • Flip Vertices Array

    - by James
    Hi, I have an array of position vertices that make up a 2D polygon. Vector2[] _chassisConcaveVertices = { new Vector2(5.122f, 0.572f), new Vector2(3.518f, 0.572f), new Vector2(3.458f, 0.169f), new Vector2(2.553f, 0.169f), new Vector2(2.013f, 0.414f), new Vector2(0.992f, 0.769f), new Vector2(0.992f, 1.363f), new Vector2(5.122f, 1.363f), }; What algorithm can I use to modify the positions so the resultant polygon is flipped? I need to flip the polygon both horizontally and vertically.

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  • Bit convector : Get byte array from string

    - by nCdy
    When I have a string like "0xd8 0xff 0xe0" I do Text.Split(' ').Select(part => byte.Parse(part, System.Globalization.NumberStyles.HexNumber)).ToArray(); But if I got string like "0xd8ffe0" I don't know what to do ? also I'm able for recommendations how to write byte array as one string.

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  • Serialize an object using DataContractJsonSerializer as a json array

    - by rekna
    I have a class which contains a list of items. I want to serialize an instance of this class to json using the DataContractJsonSerializer as a json array. eg. class MyClass { List<MyItem> _items; } class MyItem { public string Name {get;set;} public string Description {get;set;} } When serialized to json it should be like this : [{"Name":"one","Description":"desc1"},{"Name":"two","Description":"desc2"}]

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  • Error-invalid length for a base-64 char array

    - by dmenaria
    Hi , I have silverlight app that post some data to another web application ,the data to post is converted to base 64 using code byte[] byteArray = Encoding.UTF8.GetBytes(sDataToPost); sDataToPost = Convert.ToBase64String(byteArray); Another webapplication get the data using the code strText = System.Text.Encoding.ASCII.GetString(System.Convert.FromBase64String(postedData)); But it gives the exception invalid length for a base-64 char array Thanks in Advance DNM

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  • efficiently convert string (or tuple) to ctypes array

    - by Mu Mind
    I've got code that takes a PIL image and converts it to a ctypes array to pass out to a C function: w_px, h_px = img.size pixels = struct.unpack('%dI'%(w_px*h_px), img.convert('RGBA').tostring()) pixels_array = (ctypes.c_int * len(pixels))(*pixels) But I'm dealing with big images, and unpacking that many items into function arguments seems to be noticeably slow. What's the simplest thing I can do to get a reasonable speedup? I'm only converting to a tuple as an intermediate step, so if it's unnecessary, all the better.

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