dynamic-arrays

PHP - Concatenate / cascade multidimensional array keys

由 女生的网名这么多〃 提交于 2019-12-11 03:21:59
问题 I've realized I need to stop banging my head and ask for help... I have the following array: $permissionTypes = array( 'system' => array( 'view' => 'View system settings.', 'manage' => 'Manage system settings.' ), 'users' => array( 'all' => array( 'view' => 'View all users.', 'manage' => 'Manage all users.' ) ), 'associations' => array( 'generalInformation' => array( 'all' => array( 'view' => 'View general information of all associations.', 'manage' => 'Manage general information of all

No array allocated using new can have an initializer?

由 狂风中的少年 提交于 2019-12-10 01:45:43
问题 In the book I am reading at the moment ( C++ Complete Reference from Herbert Schildt), it says that no array allocated using new can have an initializer. Can't I initialize a dynamically allocated array using new ? If not whats the reason for it? 回答1: That's not quite true (you should almost certainly get yourself an alternative reference), you are allowed an empty initializer ( () ) which will value-initialize the array but yes, you can't initialize array elements individually when using

Create a fixed size std::vector and write to the elements

由 北城余情 提交于 2019-12-10 01:19:21
问题 In C++ I wish to allocate a fixed-size (but size determined at runtime) std::vector then write to the elements in this vector. This is the code I am using: int b = 30; const std::vector<int> test(b); int &a = test[3]; However, this gives me a compiler (MSVC 2010 Pro) error: error C2440: 'initializing' : cannot convert from 'const int' to 'int &'. Conversion loses qualifiers. My understanding of const is that it makes all of the member variables of a class constant. For example, the following

When writing a large array directly to disk in MATLAB, is there any need to preallocate?

由 穿精又带淫゛_ 提交于 2019-12-10 01:16:25
问题 I need to write an array that is too large to fit into memory to a .mat binary file. This can be accomplished with the matfile function, which allows random access to a .mat file on disk. Normally, the accepted advice is to preallocate arrays, because expanding them on every iteration of a loop is slow. However, when I was asking how to do this, it occurred to me that this may not be good advice when writing to disk rather than RAM. Will the same performance hit from growing the array apply ,

Fortran: How do I allocate arrays when reading a file of unknown size?

由 六眼飞鱼酱① 提交于 2019-12-09 03:56:15
问题 My typical use of Fortran begins with reading in a file of unknown size (usually 5-100MB). My current approach to array allocation involves reading the file twice. First to determine the size of the problem (to allocate arrays) and a second time to read the data into those arrays. Are there better approaches to size determination/array allocation? I just read about automatic array allocation (example below) in another post that seemed much easier. array = [array,new_data] What are all the

Can I use the [] operator in C++ to create virtual arrays

由 喜欢而已 提交于 2019-12-08 19:36:01
问题 I have a large code base, originally C ported to C++ many years ago, that is operating on a number of large arrays of spatial data. These arrays contain structs representing point and triangle entities that represent surface models. I need to refactor the code such that the specific way these entities are stored internally varies for specific scenarios. For example if the points lie on a regular flat grid, I don't need to store the X and Y coordinates, as they can be calculated on the fly, as

Compiler bug? g++ allows variable-size static arrays, unless function is templated

由 血红的双手。 提交于 2019-12-08 19:32:15
问题 The code below demonstrates a behavior of gcc 4.6.2 that I can't account for. The first function declares a static array of type vec_t, where vec_t is a typedef'd alias for unsigned char. The second function is identical, except that the type of vect_t is a template parameter. The second function fails to compile with diagnostic "error: storage size of ‘bitVec’ isn’t constant". #include <limits> void bitvec_func() { const std::size_t nbits = 1e7; typedef unsigned char vec_t; const std::size_t

How to generate an array of Multiple recipients using mandrill

由 我们两清 提交于 2019-12-08 19:17:31
I need to send emails to multiple recipients. The number of recipients will vary depending on the data in the db. Mandrill allows me to only add multiple recipients using an array. Below is what works for multiple recipients //email array that needs to be added to the 'to' key $emailArray = ["example@example.com","test@test.com","hello@test.com","world@test.com"]; $mandrill = new Mandrill('xxxxxxxxxxxxxxx'); $message = array( 'subject' => 'Thanks for signing up', 'from_email' => 'support@test.com', 'to' => array( array( 'email' => 'hello@test.com', 'name' => 'Hello Test' ), array( 'email' =>

How to generate an array of Multiple recipients using mandrill

由 别说谁变了你拦得住时间么 提交于 2019-12-08 08:16:40
问题 I need to send emails to multiple recipients. The number of recipients will vary depending on the data in the db. Mandrill allows me to only add multiple recipients using an array. Below is what works for multiple recipients //email array that needs to be added to the 'to' key $emailArray = ["example@example.com","test@test.com","hello@test.com","world@test.com"]; $mandrill = new Mandrill('xxxxxxxxxxxxxxx'); $message = array( 'subject' => 'Thanks for signing up', 'from_email' => 'support@test

VBA Error code “Run Time Error 16, Too Complex”

由 我与影子孤独终老i 提交于 2019-12-08 06:49:13
问题 When running a Dynamic array that is populated I am trying to get the contents of an element and receive the following error Run-Time Error '16': Expression too complex. The expression that is to complex? Impactdays is a long, I populated the spreadsheet by simply stuffing the range into the array ReportArray = Impact_Chart.Range("Data.EventNumber").CurrentRegion.Value For i = LBound(ReportArray) + 1 To UBound(ReportArray) If ReportArray(i, iImpactCol) > 0 Then iImpactDays = ReportArray(i,
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