circleSquare Markers are solid squaresThe decimal token is a numberDecimal-leading-zero 0 Number marks (01,02,03, etc.)Lower-roman lowercase roman Numerals (i,ii,iii,iv,v, etc.)Upper-roman Capital Roman Numerals (i,ii,iii,iv,v, etc.)Lower-alpha lowercase English Alphabet The marker is lower-alpha (a,b,c,d,e, ET)Upper-alpha Capital English Alphabet The marker is upper-alpha (a,b,c,d,e, ET)Lower-greek lowerc
Introduced
When you use Google or Baidu search, enter the search content, Google can always provide a very good spelling check, such as you enter speling, Google will immediately return to spelling.Here is a simple, but full-featured spell checker implemented with 21 lines of Python code.
Code
Import Re, collectionsdef words (text): Return Re.findall (' [a-z]+ ', Text.lower ()) def Train (features): Model = Collectio Ns.defaultdict (lambda:1) for F in features:model[f] + = 1 return modelnwords =
Although the friendship of the boat can not withstand the wind and waves, said turn over, love of the wheel also escaped the attack of the storm, said Sink sank! But if with the Dragon King has a fixed Poseidon needle, there is a good helmsman, friendship like it can not be overturned! This is the MathType Math formula editor!With MathType, the god-like formula editor, editing formulas doesn't have to be laborious at all. No integral sign? MathType there! No Greek symbols? MathType there! Not co
integrated with 6 lines (26 in the real thing), and the keyboard signals correspond to the different lights on the monitor. As we can see, if the a key is pressed, then light B will light up, which means that a is encrypted as B. Similarly, we see that B is encrypted into a a,c encrypted into a d,d encrypted into a f,e encrypted into a e,f encrypted into C. So if we type Cafe (coffee) on the keyboard, DBCE will be displayed on the monitor in turn. This is one of the simplest encryption methods,
moment.
The keyboard, rotor, and display are connected by wires, and the rotor itself is also integrated with six lines (26 in the real world) to map the keyboard signal to different small lights on the display. We can see that if you press the key, the light B will be on, which means that a is encrypted into B. Similarly, we can see that B is encrypted into A, C is encrypted into D, D is encrypted into F, E is encrypted into E, and F is encrypted into C. Therefore, if we type cafe (coffee) o
("Machine Inactive"):println ("Machine State Unknown")In the above example, machine Inactive will be printed because the value of Machinestate is state.inactiveAn enumeration type can define its own value type, or you can assign other types (including integers, strings, floating-point types, and so on) to enumerated types.To assign other types of values to an enumeration type, you must specify the type of the enumeration and then use the copy operator to assign the value. For example, if you wa
encode to 4 chars. Output is always an even// Multiple of 4 characters.//For (int I = 0, index = 0; I Boolean quad = false;Boolean trip = false;
Int val = (0xFF (int) data [I]);Val If (I + 1) Val | = (0xFF (int) data [I + 1]);Trip = true;}Val If (I + 2) Val | = (0xFF (int) data [I + 2]);Quad = true;}Out [index + 3] = alphabet [(quad? (Val 0x3F): 64)];Val >>=6;Out [index + 2] = alphabet [(trip? (Val 0x
The education website will encounter this problem:How to display a phonetic symbol on a webpage?Why is the phonetic symbol displayed as a random character?? And so on. This problem was also encountered when I made an English page of Hu Jiang network two days ago. So, let's share it here after solving the problem.Can I solve the problem by using the ISO Latin-1 character set?
How to display the English phonetic alphabet on the page
At the beginning, we
At present, primary school English involves mastering the pronunciation rules of vowels and common letter combinations. Students can still grasp this aspect, but most students still rely on rote memorization, in fact, we need to master their pronunciation rules.
English pronunciation rules
Pronunciation of vowels in re-Stressed syllables
A
In the opening syllable
[Ei]
Name plane Jane baby cake
In closed syllables
[?]
Bag Dad hat map black back
E
In the opening syllable
[I:]
He these me Chinese
later, because the lining and no liner body is the development of western fonts, applied in the Chinese style, the song is the lining of the body, the black body is no liner.
There is no liner in the English font
The process of the creation of the western alphabet, through the evolution of Egypt → Phoenician → Greece, finally in the Roman body, by the Western world widely used to now and popular in the world. With the production of movable type,
table instead of a password.For natural language, if you take a non-professional book, a long enough text will find that the frequency of the occurrence of letters (or characters) will reflect the statistical characteristics of the corresponding language. The statistics of a large number of texts will find that each letter in the corresponding language appears in the corresponding language probability.So we get a probability distribution on the alphabet
, delicate feeling, thick bold word to people heavy, stout, the feeling of strength, These glyphs are designed according to different needs. In addition to the two basic glyphs of XXFarEastFont-Arial and blackbody, there are many different kinds of Chinese glyphs, such as
PS: The lining of the word will be mentioned later, because the lining and no liner body is the development of western fonts, applied in the Chinese style, the song is the lining of the body, the black body is no liner.
The
The attributes of the lexical notation, which are used to further differentiate the attributes within the token.
A1 becomes the first dollar, A2 is called Second dollar, analogy .... ;
For example: Position = initial + rate * 60 notation and attributes
After the lexical analysis is complete, the tokens and attributes are returned each time.
Second, string and language
-Alphabet: A limited set of symbols, such as ={0, 1}
-string: A poor sequ
Original paper (Russian) address: Suffix_automata
Automatic suffix machine
Suffix automata (word-to-loop)-is a powerful data structure that allows you to solve many string problems.
For example, you can use a suffix automaton to search for all occurrences of another string in a string, or to calculate the number of different substrings-all in a linear
Time to resolve.
Intuitively, a suffix automaton can be understood as a concise message for all substrings. An important fact is that the suffix
. To implement this tree, we use the most common array to save (static memory) can, of course, also open the dynamic pointer type (dynamic open memory). There are generally three ways to point a knot to a son: 1) An array of alphabet-size is opened for each node, and the corresponding subscript is the letter represented by the son, and the content is the position of the son corresponding to the large array, that is, the label; 2) for each node to hang
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.