大约有 5,891 项符合查询结果（耗时：0.0129秒） [XML]
What are the advantages of using a schema-free database like MongoDB compared to a relational databa
... often represent in a single entity a construct that would require several tables to properly represent in a relational db. This is especially useful if your data is immutable.
Deep query-ability. MongoDB supports dynamic queries on documents using a document-based query language that's nearly as po...
How do I create a random alpha-numeric string in C++?
... the trick, but I found it a bit too verbose for this simple task. Look-up tables can sometimes do wonders:
#include <iostream>
#include <ctime>
#include <unistd.h>
using namespace std;
string gen_random(const int len) {
string tmp_s;
static const char alphanum[] =
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How do I represent a hextile/hex grid in memory?
...u/~amitp/game-programming/grids (the diagrams are for square grids but the table includes the formulas for axial hex grids also)
– amitp
Jun 7 '13 at 0:58
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Exotic architectures the standards committees care about
...rfaced:
Unisys C Compiler Programming Reference Manual
Section 4.5 has a table of data types with 9, 18, 36, and 72 bits.
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How Scalable is SQLite? [closed]
...g edits and realize that there are ways of speeding up SQLite to have acceptable performance.
– Kyle Cronin
Jul 23 '09 at 17:03
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What is better, adjacency lists or adjacency matrices for graph problems in C++?
...e can improve the space-efficiency of the adjacency matrix by using a hash table where the keys are pairs of vertices (undirected only).
Iteration and lookup
Adjacency lists are a compact way of representing only existing edges. However, this comes at the cost of possibly slow lookup of specific e...
Detecting when the 'back' button is pressed on a navbar
...s run through an example. Say you have three view controllers:
ListVC: A table view of things
DetailVC: Details about a thing
SettingsVC: Some options for a thing
Lets follow the calls on the detailVC as you go from the listVC to settingsVC and back to listVC
List > Detail (push detailVC) De...
What is a servicebus and when do I need one?
...its use of queuing technology - your choice of RabbitMQ, MSMQ, Regular SQL Tables, Amazon SQS, Azure Storage Queues, and Azure Service Bus.
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Returning 'IList' vs 'ICollection' vs 'Collection'
...of the items and this order could change at any time, if the internal hash table is re-organized.
– Olivier Jacot-Descombes
Jan 2 '15 at 17:07
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What's the difference between IQueryable and IEnumerable
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IEnumerable
IEnumerable is best suitable for working with in-memory collection.
IEnumerable doesn’t move between items, it is forward only collection.
IQueryable
IQueryable best suits for remote data source, like a database or web service.
IQueryable is a v...