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Thoughts on C

EdBrian W Kernighan and Dennis M Ritchie, Prentice Hall, 1988, ISBN 0-13-110362-8.[2]C UnleashedRichard Heathfield, Lawrence Kirby Etc.[3]Applied C: An Introduction and MoreAlice E. Fischer and David W. Eggert, McGraw Hill, ISBN 7-5053-6931-8.[4]ISO 1999 Programming languages ages-C[5]Expert C ProgrammingPeter van der Liden, Prentice Hall, ISBN 0-13-177429-8.[6]Strlcpy and strlcat-consistent, safe, string copy and concatenationTodd C. Miller and Theo de Raadt, 1999

Rfc1928-SOCKS Protocol version 5

carrying a FRAG field whose value is less than the highest FRAG value processed for this fragment sequence. The reassembly timer MUST be no less than 5 seconds. It is recommended that fragmentation be avoided by applications wherever possible. Implementation of fragmentation is optional; an implementation that does not support fragmentation MUST drop any datagram whose FRAG field is other than X'00'. The programming interface for a SOCKS-aware UDP MUST report an available buf

[Summ] coupled Congestion Control for Multipath transport protocols [draft-ietf-mptcp-congestion-07]

Coupled Congestion Control for Multipath transport protocols [draft-ietf-mptcp-congestion-07] Link: http://tools.ietf.org/html/draft-ietf-mptcp-congestion-07 Important documents: [1] wischik, D ., raiciu, C ., greenhalgh, ., and M. handley, "design, implementation and evaluation of congestion control for Multipath TCP", usenix NSDI, March 2011. [2] Damon's NSDI conference video: http://www.youtube.com/watch? V = iqx1cshqh6i Design goals: 1) Each sub

Php-perl hash Algorithm implementation (TIMES33 hash algorithm) _php techniques

Copy Code code as follows: APR_DECLARE_NONSTD (unsigned int) apr_hashfunc_default (const char *char_key, apr_ssize_t *klen) { unsigned int hash = 0; Const unsigned char *key = (const unsigned char *) Char_key; const unsigned char *p; apr_ssize_t i; /* * This is the popular ' Times ' hash algorithm which be used by * Perl and also appears in Berkeley DB. This is one of the best * Known hash functions for strings because it is both computed * Very fast and distributes very. * *

Briefly describe the concept of object-oriented programming in Python.

the Method of the object ). The object-oriented program is written like this: bart = Student('Bart Simpson', 59)lisa = Student('Lisa Simpson', 87)bart.print_score()lisa.print_score() Object-Oriented Design comes from nature, because in nature, the concepts of classes and instances are natural. Class is an abstract concept. For example, Student, the Class we define, refers to the Student concept, and Instan

Python enumerate index iteration code parsing, pythonenumerate

Python enumerate index iteration code parsing, pythonenumerate This article focuses on Python enumerate index iteration. Index Iteration In Python, iterations always extract the element itself, not the element index. For ordered sets, the elements are indeed indexed. Sometimes, we really want to get the index in the for loop. What should we do? The method is to use the enumerate () function: >>> L = ['Adam', 'Lisa', 'Bart', 'Paul']>>> for index, name

72 change of a label to create a library of pure CSS icons

Height:40px;8 Border-top-width:0;9 Border-right-width:0;Ten Border:4px Solid; One Border-color:Transparent; A Box-shadow:-4px 5px; - Overflow:Hidden; -} the - . Icon-test:before,.icon-test:after{ - content:"'; - pointer-events:None; + position:Absolute; -} + A . Icon-test:before{ at Left:0; - Bottom:8px; - Border:14px Solid Transparent; - Border-bottom-color:CurrentColor; - Box-shadow:0 16px; -} in - . Icon-test:after{ to Left:28px; + Bottom:9px; - Border-width:0 9px 21px; the Border-style

Andorid traffic Test Method

In the context of the mobile Internet, traffic testing is a very necessary Terminal Test in the Age of waste of money. Lisa recently used the blank time to conduct research on Android traffic testing. There are many methods to do this, and the methods are constantly updated. For example, andorid4.0 comes with a "traffic usage ", some tools also carry the traffic statistics function, but Lisa seems unreliabl

Types and values in Lua

--There is no reference to table now The output is as follows: Hihellohello when the reference to a table is 0 o'clock, the LUA garbage collector eventually deletes the table and frees the memory space it occupies. When an element of table is not initialized, its content is nil, and as with global variables, nil is given to an element of table to delete the element. In Lua, this form of a["name" provides a simpler way to write, and you can enter a.name directly. We need to understand the differe

A detailed description of the MapReduce process (using WordCount as an example)

they have to be sorted? Perhaps it was written in MapReduce that "most of the reduce programs should want to enter the data that has been sorted by key, and if so, then we can simply help you out, please call me Lei Feng!" ” ...... All right, you are Lei Feng.So let's assume that the previous data is sorted again, and the results are as follows:Split 0Partition 1:Company 1is 1is 1Partition 2:My 1My 1Name 1Pivotal 1Tony 1Split 1Partition 1:Company 1EMC 1is 1is 1Partition 2:

How do girls select a nice and suitable English name?

. People say that Laura is a beautiful blonde blue-eyed woman with a classic temperament and a sweet character. Lena (Latin); "Leen", "" Lena, "" Lina, "" line ". Lena has two different images: petite, lively, or stubborn, older Norwegian women. Lydia was originally a place name in the Asia Pacific region. In ancient times, there was a king named Croesus, making this place a prosperous region. Later, his kingdom collapsed in 546 BC. Lydia, after becoming a people, is righteous as a girl in the L

Common applications and parameters of the $ http service in AngularJS, and angularjs Parameters

Common applications and parameters of the $ http service in AngularJS, and angularjs Parameters Preface $ Http service: it simply encapsulates the nativeXMLHttpRequestAn object that contains the configuration content used to generate an HTTP request. This function returnspromiseObjectsuccessAnderrorMethod. $ Http service scenarios: Var promise = $ http ({method: "post", // It can be get, post, put, delete, head, jsonp; get, posturl :". /data. json ", // Request Path params: {'name': '

Study on Python crawler learning

list or tuple, we can traverse the list or tuple through a for loop, which iterates over us as an iteration (iteration).2. The iterative operation is for a collection, regardless of whether the collection is ordered or unordered, we can always use the for loop to sequentially remove each element of the collection.3. A collection is a data structure that contains a set of elements that we have covered:1. Ordered set: List,tuple,str and Unicode;2. Unordered collection: Set3. Unordered collection

MySQL terminal (Terminal) Management database, data table, data basic operation (GO)

| Age | BIRTHDAY | +----+--------+-----+---------------------+ | 1 | Anny | 22 | 1992-05-22 00:00:00 | | 2 | Garvey | 23 | 1991-05-22 00:00:00 | | 3 | Lisa | 25 | 1989-05-22 00:00:00 | | 4 | Nick | 24 | 1990-05-22 00:00:00 | | 5 | Rick | 24 | 1991-05-22 00:00:00 | +----+--------+-----+---------------------+ 5 rows in Set (0.00 sec) 3.2 Deleting data (delete)The delete command deletes the data: Mysql> Dele

Python High-order function--Sorted

For details, please refer to the official website of Liao Xuefeng, here are just a few excerpts, experience and practice of coding. Python's built-in sorted() functions can sort the list:>>> sorted ([5, -12, 9, -21]) [-21,-12, 5, 9, 36] sorted()A function is also a higher-order function, and it can also receive a key function to implement a custom sort, for example, by absolute size:>>> sorted ([5, -12, 9, -21], key=ABS) [5, 9,-12,-21, 36] It is important to emphasize that sorted will on

Adding new elements to Python

Adding new elements to PythonNow, there are 3 students in the class:>>> L = [' Adam ', ' Lisa ', ' Bart ']Today, the class transferred to a new classmate Paul, how to add new students to the existing list?The first option is to append the append() new classmate to the end of the list by using the list method:l.append (' Paul ')>>> print l[' Adam ', ' Lisa ', ' Bart ', ' Paul ']Append () always adds a new el

Python common functions

, as long as the incoming function f can handle the data type.TaskAssuming that the user entered the English name is not standard, not according to the first letter capitalization, subsequent letter lowercase rules, please use the map () function, a list (including a number of nonstandard English names) into a list containing the canonical English name:Input: [' Adam ', ' LISA ', ' BarT ']Output: [' Adam ', ' Lisa

Python Update Dict

Update DictDirect assignment of key-value that need to be updatedDict is mutable, meaning that we can add new Key-value to dict at any time. For example, there are dict:D = {' Adam ': 95,' Lisa ': 85,' Bart ': 59}To add a new classmate ' Paul ' score 72, use the assignment statement:>>> d[' Paul '] = 72Then look at the contents of Dict:>>> Print D{' Lisa ': $, ' Paul ': $, ' Adam ': Up, ' Bart ': 59}If the

Python Flashback Slice

Reverse sectioningFor list, since Python supports l[-1] to take the first element of the countdown, it also supports the inverse slice, try it:>>> L = [' Adam ', ' Lisa ', ' Bart ', ' Paul ']>>> l[-2:][' Bart ', ' Paul ']>>> l[:-2][' Adam ', ' Lisa '] gt;>> l[-3:-1][' Lisa ', ' Bart ']>>> l[-4:-1:2][' Adam ', ' Bart 'Remember that the index of the first element o

Python High-order function "Go"

def char2num(s): return {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}[s] return reduce(fn, map(char2num, s))You can also use lambda functions to further simplify:def char2num(s): return {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}[s]def str2int(s): return reduce(lambda x,y: x*10+y, map(char2num, s))That is, assuming that Python does not provide a int() function, you can write a function that converts the s

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