structure

问题 I use a structure called test with the following "layout" (result of whos test, test ) Name Size Bytes Class Attributes test 1x1 8449048 struct test = timestamp: {[7.3525e+05] [7.3525e+05] [7.3525e+05]} timeseries: {[44000x8 double] [44000x8 double] [44000x8 double]} For speed issues, I want to preallocate that with zeros. I found some ways, which result in other "layouts": test2=struct('timestamp',cell(1,3),'timeseries',cell(1,3)); test3=struct('timestamp',{0,0,0},'timeseries',{zeros(44000,8

问题 Is there any way to emulate a structure class in PHP? ie a class which passes by value and not by reference, so it can still be type hinted... And if so, what different techniques could be used? What's the best technique? If this is possible you could obviously create a fully type safe layer for PHP, are there such layers? Has anyone had any experience with this? 回答1: Objects are always passed by reference. The only way to make them pass as a copy is to explicitly use the clone keyword (yes,

问题 How are arrays of structures accessed using pointer arithmetic? suppose I have a struct struct point{ int x; int y; }collection[100]; Suppose I have a function int func(struct point *collection,int size) Inside this function I access the element as shown below. collection[0].x Is this the same as *(collection + 0).x ? Since the . operator has higher precedence than the * operator, first the collection pointer is incremented by 0, and the the dot operator is applied, and then the pointer

问题 Currently I'm running webprojects with the following directory structure (simplified): project_folder/ public/ root/ index.php What I want to do is set the root in the server block to: root /project_folder/root/; But when a request location does not exists I want it to forward the request to project_folder/index.php. I tried the following: try_files $uri ../index.php?$query_string; But this doesn't seem to work. The same goes for a request that starts with $document_root/public/* which need

问题 applications coupled with the realization ZendFramework + Doctrine 1.2 for some time, but now they have their first experience with the use of more modules. I requested a default module is visible to everyone with a certain layout and an admin module with a different layout. So far in my applications I have always used the following structure: /app /application /acls /configs /controllers /forms /layouts /models --> models by doctrine /generated --> base models by doctrine /plugins /views

问题 Since I discovered Python, I've created four little applications with Glade + Python + Gtk. For each of them, the structure is a folder, with the name of the app, containing : an "images" folder a main .py file which contains all classes that handle all project windows a .glade file which contains all windows (main app window, about dialog, config dialog, etc.) a style.css file (other files as sqlite file and/or json file if neccessary) Now I'm wondering if this organization is a good

问题 Is there any way to set global memory byte alignment for all data structures in JNA library (*.dll Java wrapper)? Sometimes I have to determine correct alignment by trial and error during implementation and currently I'm doing this in very clumsy way - I'm setting data alignment (super(ALIGN_NONE)) in each and every structure (a lot of structures in separate files). edit: The best way to solve my problem was to extend Structure: public abstract class StructureAligned extends Structure {

问题 I have a delete function on array of structures books . I'm passing it an array of records, author of book and name of book and size of the list . Now here given that list[0].author and list[5].author and author all are equal to "Dan Brown" (same string) void delete(struct books *list,char author[],char name[],int n) { int i,a; a=strcmp(list[0].author,list[5].author); printf("%d\n",a); // prints 0 a=strcmp(list[0].author,author); printf("%d\n",a); // prints other than 0 } Why is it happening?

问题 I am new to MySQL. I am creating some web services using MySQL but I am not sure what is the best way to use the database. One is the one database that has a lot of items and continually make row following query. Another one is making db database dynamically. Database database is consist of some questions for each user and the number of questions is not fixed. 回答1: Dynamically creating new tables in database is a well known antipattern. For one, it actually makes it more difficult to code,

问题 How can i access the following structure path with dynamic fieldnames: var = 'refxtree.CaseDefinition.FlowSheetObjects.MaterialStreamObjects{8}.MaterialStreamObjectParams.Pressure.Value.Text'; fields = textscan(var,'%s','Delimiter','.'); refxtree.(fields{:}) does not work because MaterialStreamObjects contains a cell array of which I want to access the 8th cell and then continue down the structure path. In the end I want to get and set the fieldvalues. 回答1: You need to build the appropriate