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2-3-4 trees and red/black trees may look completely different. However, in a sense, the two are exactly the same. There is a data item and two subnodes are called 2-nodes. There are two data items and three sub-nodes called 3-nodes. Three data items and four subnodes ar

as hardware raid, and features are not as good as hardware raid. Next we will introduce various RAID technologies I. RAID 0 The band technology is used to write data in parallel on multiple disks in bytes or bits (the starting offset of each disk is the same, and the subsequent segments of a certain number of bytes, i/O read/write performance can be improved, but it does not have data redundancy like raid1. Once the hard disk fails, it will be done. The structure is as follows. Ii. Raid 1 The

The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address information in the data packet and forward it according to the MAC address, the MAC addresses and corresponding ports are recorded in an internal address table. The specific workflow is as follows: (1) When the switch receives a packet from a port, it first reads the source MAC addres

2-3-4 is a type of B tree with a level of 4. It is a self-balancing data structure that can be searched, inserted, and deleted in O (lgn) time. Here N is the number of elements in the tree. 2-3-

Three: Oc--1. The creation and use of NSString,1, create a constant string, and note the "@" symbol.NSString *astring = @ "This is a string!"; The following is a constant, preceded by a pointer variable2,nsstring *s1 = [NSString new];//no meaningS1 [email protected] "jian le ma";3, the third method of creating a stringFormat creates a string (creates a string in the specified format)NSString *imgname = [NSString stringwithformat:@ "xxxxxx%02d.jpg", I]

bitsDifferenceIf the number is divisible by 11, the number can be divisible by 11. The multiple checksum of 11 can also be handled by the checksum of 7 above! The only difference in the process is that the multiples are not 2 but 1!Number of integers that can be divisible by 12. If an integer can be divisible by 3 and 4, this number can be divisible by 12. Numb

Displays the representation of an expression 1*2+3*4+...+9*10The source program code is as follows:1 /*2 June 7, 2017 22:54:513 function: Implementation of 1*2+3*4+...+9*10 expression o

Displays the representation of the expression 1*2+3*4+...+99*100 (takes the form of an interaction)The program source code is as follows:1 /*2 June 8, 2017 08:03:383 function: Output The following expressions in an interactive form4 */5#include"stdio.h"6#include"string.h"7 8 intMain ()9 {Ten Charseq[ +]; One in

Xception: Here we have a picture of a Scottish barrel, especially my favorite Scotch whisky, Lagavulin. Xception correctly classifies this image as "buckets".The last example is to classify using VGG16: A few months ago, when I finished the game of the Wild Hunt, I took this photo of the monitor. VGG16 's first prediction was "home theater", which was a reasonable prediction because there was a "TV/monitor" in the top-5 forecast.As you can see from the examples in this article, the

-2", subject = subjects [0]}, new book {Title = "C # on Rails", publisher = Publishers [1], authors = new [] {authors [2]}, pagecount = 256, price = 35.5 M, publicationdate = new datetime (2007, 4, 1 ), ISBN = "0-222-77777-2", subject = subjects [0]}, new book {Title = "all your base are belong to us ", publisher = Pub

07. C # Brief description of generic restrictions and empty types (Chapter 3, chapter 2-Chapter 4, Chapter 3.5 ), While writing articles, I am also learning. I don't have a good understanding of many statements in the book. Read a book and digest it !!! The three chapters are about generics. Finally, let's write the limitations on generics. for the end of this ch

Following opium and morphine, a more dangerous drug has come to the human world, and it is heroin. Heroin is a semi-synthetic opium drug and has a history of more than one hundred years. The pure heroin (commonly known as the white powder) mainly comes from the Golden Triangle (borders of Myanmar, Thailand, and Cambodia), some from Lebanon and Syria, and more from Pakistan. The color, precision, and purity of the product depend on the origin. White from Thailand, both pure and white from Leban

C language computing 1/1-1/2 + 1/3-1/4 + 1/5-... + 1/99-1/100Calculate 1/1-1/2 + 1/3-1/4 + 1/5-... + 1/99-1/100. Method 1: Calculate 1/1-1/2 + 1/3