structure

How do I dump the struct into the byte array without reflection?

由 一个人想着一个人 提交于 2019-12-29 03:27:28
问题 I already found encoding/binary package to deal with it, but it depended on reflect package so it didn't work with uncapitalized(that is, unexported) struct fields. However I spent a week to find that problem out, I still have a question: if struct fields should not be exported, how do I dump them easily into binary data? EDIT: Here's the example. If you capitalize the name of fields of Data struct, that works properly. But Data struct was intended to be an abstract type, so I don't want to

Solr documents with child elements?

由 隐身守侯 提交于 2019-12-28 03:04:35
问题 Is it somehow possible to create a solr document that contains sub-elements? For example, how would I represent something like this: <person first="Bob" last="Smith"> <children> <child first="Little" last="Smith" /> <child first="Junior" last="Smith" /> </children> </person> What is the usual way to solve this problem? 回答1: You can model this in different ways, depending on your searching/faceting needs. Usually you'll use multivalued or dynamic fields. In the next examples I'll omit the

PHP - How to build tree structure list?

由 ☆樱花仙子☆ 提交于 2019-12-28 02:39:10
问题 So, my problem is, that I want to build a tree of these 2 tables: Parent table: +-------+---------------+ | pr_id | parent_name | +-------+---------------+ | 1 | p | | 2 | p_0 | | 3 | p_0_1 | | 4 | q | +-------+---------------+ Child table: +-------+---------------+---------------------------+ | ch_id | pr_id | child_name | +-------+---------------+---------------------------+ | 1 | 1 | p_0 | | 2 | 1 | p_1 | | 3 | 2 | p_0_0 | | 4 | 2 | p_0_1 | | 5 | 3 | p_0_1_0 | | 6 | 3 | p_0_1_1 | | 7 | 4 |

inserting many ArrayList inside a single structure

由 ≡放荡痞女 提交于 2019-12-25 12:16:44
问题 as title says i want to know if exist any structure that can allows something like this: key = 1 -> arrayList1 , arrayList2 , arrayList3... someStructure.add(1,arrayList<1>); someStructure.add(1,arrayList<2>); someStructure.add(1,arrayList<3>); IMPORTANT the key has to remain the same for each list. 回答1: You can roll your own by using a Map Map<YourKeyClass, List<Data>> someStructure = new HashMap<YourKeyClass, List<Data>>(); To your desired situation, looks like you need: Map<YourKeyClass,

Is it legal to wrap li in a?

由 你说的曾经没有我的故事 提交于 2019-12-25 09:15:23
问题 I struggle a bit to understand the documentation here: http://w3c.github.io/html-reference/terminology.html#transparent which is linked to from here: http://w3c.github.io/html-reference/a.html#a-changes As far as I understand it the following code should be ok: <!doctype html> <head><title>Yo!</title> <body> <ul> <a> <li>My list item is wrapped in an anchor. </a> </ul> But when I paste this code in different validators, they all agree that the li element can not be wrapped in an a element

Accesing shm structure using pointer

由 梦想与她 提交于 2019-12-25 08:03:14
问题 I have a c structure like this : struc str{ int values[10]; }str In a posix so like fedora i copied this structure to a part of shared memory ( shm_open , ftruncate , mmap and memcpy ) and I got a pointer to structure from shm. Now how do I change a value in the values array by using this pointer (*ptr). Imagine i want to do str->values[5] = 10; how to I do that using the pointer. 回答1: Just use the pointer: struct str *p = ptr; p->values[5] = 10; 来源： https://stackoverflow.com/questions

What are the total number of possible ordered trees with N nodes?

由 强颜欢笑 提交于 2019-12-25 05:27:05
问题 For example for N=3, we can find easily by listing them all, but when asked for any arbitrary N value I am facing problem. 回答1: If you are looking at binary trees then, as mcdowella said, Choose(2n,n)/(n+1) (Catalan number) is the answer. If you are looking at arbitrary trees then it is probably n. n^(n-2) = n^(n-1), but I am not totally sure. Prufer's algo tells us that there are n^(n-2) labeled trees and any of the nodes can be made a root, thus we get the number n^(n-1). 回答2: This is

Error C2440 initializing cannot convert void to typ

由 依然范特西╮ 提交于 2019-12-25 05:13:16
问题 #include <stdlib.h> #include <stdio.h> // self - referential structure struct listNode { char data; // each listNode contains a character struct listNode *nextPtr; //pointer to next node }; typedef struct listNode ListNode; // synonym for struct listNode typedef ListNode *ListNodePtr; // synonym for struct listnode* void insert(ListNodePtr *sPtr, char value) { ListNodePtr newPtr = malloc(sizeof(ListNode)); // create node if (newPtr != NULL) // is space availale? { newPtr->data = value; //

Pointer of structure initialization to NULL

由 China☆狼群 提交于 2019-12-25 02:49:16
问题 I'm having a problem with a structure within a structure: typedef struct BrickStruct { int type; SDL_Rect Brick_Coordinates; SDL_Surface *Brick_Surface = NULL; }BrickStruct; my compiler says that about the line with the SDL_Surface structure: error: expected ':', ',', ';', '}' or '__attribute__' before '=' token But I don't really understand because I got in front of me my teacher's lesson about pointer of structure saying that: Coordinate *point = NULL; Coordinate being a structure with two

How to allocate memory for an array of structure in C#

由 筅森魡賤 提交于 2019-12-25 02:49:09
问题 Structure 1: typedef struct _wfs_cdm_cu_info { USHORT usTellerID; USHORT usCount; LPWFSCDMCASHUNIT * lppList; } WFSCDMCUINFO, * LPWFSCDMCUINFO; Structure 2: typedef struct _wfs_cdm_cashunit { USHORT usNumber; USHORT usType; LPSTR lpszCashUnitName; CHAR cUnitID[5]; CHAR cCurrencyID[3]; ULONG ulValues; ULONG ulInitialCount; ULONG ulCount; ULONG ulRejectCount; ULONG ulMinimum; ULONG ulMaximum; BOOL bAppLock; USHORT usStatus; USHORT usNumPhysicalCUs; LPWFSCDMPHCU * lppPhysical; } WFSCDMCASHUNIT,
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