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Chapter 3 Naming rules Naming rules should be naming rules for variables, functions, and classes. I have heard of the "Hungary" Naming rules. The main idea is to add a prefix to the variable and function name to improve people's understanding of the program. For example, all character variables are prefixed with 'ch. If a variable starts with PPCH, it indicates that it is a pointer to a character pointer. The biggest disadvantage of the "Hungary" meth

Let's take a look at the differences between Layer 2 switches, Layer 3 switches, and Layer 4 switches. (1) Differences Between Layer 2 switches, Layer 3 switches, and Layer 4 switches The layer-2 switching technology is mature. The layer-2 switch is a data link layer device that can identify the MAC address informati

From: http://www.juniperbbs.net/viewthread.php? Tid = 5859 extra = Page % 3d1% 26amp % 3 bfilter % 3 ddigest 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

Layer-2, layer-3, and layer-4 switches have different characteristics. layer-2 switching is a mature technology. A layer-2 switch is a data link layer device that can identify MAC address information in data packets, forward based on the MAC address, and record these MAC addresses and corresponding ports in an internal address table. The specific workflow is as follows: (1) When the switch receives a packet

by element id, class, and tagName. 1. $ ("# id"): id selector, document. getElementById ("id "); 2. $ ("div"): Element selector document. getElementsByTagName ("div "); 3. $ (". myClass"): class selector, which returns all elements of class = "myClass" 4. $ ("*"): returns all elements, mostly used for context search. 5. $ ("div, span, p. myClass"): A Multi-condition selector that returns all elements found

1) layer-2 Exchange Technology The layer-2 switching technology is relatively mature. The layer-2 switch is a data link layer device that can identify MAC locations in data packets.Address information, which is forwarded based on the MAC address, and the corresponding MAC addresses and ports are recorded in a local location.Address Table. The specific workflow is as follows: 1) when the switch receives a packet from a port, it first reads the source MAC address from the packet header so that it

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 address from the packet header, so that it knows the port on which the machine with the source M

In the PHP language, for digital characters and numbers how to participate in the operation, in specific cases will be determined, for example: echo "3+4+5"; Results: 3+4+5. Because it is treated as a string. When echo1+2+ "3+4+5"

As can be seen from the analysis of the 4th section, binary search tree is a very good data structure, can quickly find a given keyword data items, and can quickly insert and delete data items. But binary search tree has a very troublesome problem, if the tree is inserted in random data, then the performance is good, but if the insertion is ordered or reverse-order data, then the two-fork search tree execution speed becomes very slow. Because the binary tree is unbalanced when inserting values i

BH (0x20fe6d64) file #: 7 rdba: 0x01c00082 (7/130) class: 4 ba: 0x20cb6000 Set: 3 pool: 3 bsz: 8192 bsi: 0 sflg: 1 pwc: 0, 0 Dbwrid: 0 obj: 23199 objn: 23199 tsn: 7 afn: 7 hint: f Hash: [0x2a39d804, 0x2a39d804] lru: [0x217f7ccc, 0x21befb08] Lru-flags: on_auxiliary_list Ckptq: [NULL] fileq: [NULL] objq: [0x21befb20, 0x22beab34] objaq: [0x2443a408, 0x2 1befb28] St

The development of switch technology is very rapid. From the third-layer switch technology to the fourth-layer switch technology, the experience is very short, meeting more needs of users. When I first heard the word "Layer 3", I had some puzzles. The subsequent concepts of Layer 4 switching and Layer 7 switching are even more confusing. In fact, in strict terms, exchange means the connection between the so

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. 2-3-4 trees are equivalent to the red-black tree, that is, each red-black tree can be

This is seen in the geeksforgeeks when a problem, very good, the topic isGiven a number system with only 3 and 4. Find the nth number in the number system.First few numbers in the number system Are:3, 4, 33, 34, 43, 44, 333, 334, 343, 344,433, 434, 443, 444, 3333, 3334, 3343, 3344, 3433, 3434, 3443, 3444, ...(Topic lin

Document directory 1. Used to disable CSS of controls 2. Used to verify the CSS of the control 3. used to hide the css of the field Div Element 4. CSS for the Table, Image, and ImageButton controls 5. CSS for UpdatePanel and UpdateProgress controls 6. eliminate unnecessary External tables 7. layout template of the wizard Control 8. Added HTML format setting options for the CheckBoxList and RadioBu

The previous section said 16-bit Timer 1, this section is about 8-bit timer 3 and timer 4!1. OverviewTimer 3 and Timer 4 are two 8-bit timers (8-bit timers). Each timer has a dual independent capture/compare channels (separate capture/compare channel), each using one I/O pin per channel.　　Features:· Capture/compare Cha

Top one According to foreign media reports, Mozilla has finally released the long-awaited Firefox 4 beta 3 Web browser. According to reports, in terms of functionality, the Firefox 4 beta 3 browser is first available to MicrosoftWindows 7 users have a big surprise, because the browser has finally made full use of th

two number and stored in the array B, to sort a (the original array) and B array, to determine a[i=0]+b[j= (n (n-1))]=0?, if three number 22 and equal to 0, then to the result array, (guaranteed output results are not duplicated), The final output result set. See the code, write a bit messy, hope forgive me!AC Code:Four-digit and whether 0http://www.51nod.com/onlineJudge/questionCode.html#!problemId=1267given n integers, you can determine if you can choose