How can I modify the classic Cartesian product code? Cartesian product code: lt ;? PHPfunctionDescartes () { nbsp; $ t = func_get_args (); nbsp; if (func_num_args () = classic Cartesian product code, how can I modify it?
Cartesian product code:
Function Descartes (){
$ T = func_get_args ();
If (func_num_args () = 1) return call_user_func_array (_ FUNCTION __, $ t [0]);
$ A = array_shift ($ t );
If (! Is_array ($ a) $ a = array ($ );
$ A = array_chunk ($ a, 1 );
Do {
$ R = array ();
$ B = ar
verified. The verification relationships of each horizontal bar are as follows:
D1 + D2 + D3 +... + Dn-1 = P1
Dx = P1-D1-D2-D3-...-Dn-1 (D sequence exclusive Dx)
That is: Dx = P1 + D1 + D2 + D3 +... + Dn-1 (D sequence excludes Dx)
Multiple redundancy Models]
The preceding single redundancy only supports the absence of one storage member. In practice, higher red
programmers have strong or weak points.
Putting aside impetuousness, it is right to sink your mind to do things.
Source code of the appendix Program (I do not know it was written by the Senior Engineer ):
E100 33 F6 BF 0 20 B5 10 F3 A5 8C C8 5 0 2 50 68 13 1 CB e 1f be A1 1 BF 0 1E11b 6 57 B8 11 1 BB 21 13 89 7 4B 4B 48 79 F9 ad 86 E0 8B C8 bd ff E8 20E134 0 3D 0 1 74 1A 7f 3 aa eb F3 2D FF 0 50 E8 F 0 5A F7 D8 8B D8 26 8A 1 aaE14f 4A 75 F9 EB de CB 57 BB 21 13 8B C1 40 F7 27 F7 F5 8B FB Ba 11
Copy the following code and save it as a text document. Name it 1.
Use DEBUG
Generate an executable program.
It's a 3D Game rotation interface, and there's a wonderful piece of music !!!Go and have a look
E100 33 F6 BF 0 20 B5 10 F3 A5 8C C8 5 0 2 50 68 13 1 CB e 1f be A1 1 BF 0 1E11b 6 57 B8 11 1 BB 21 13 89 7 4B 4B 48 79 F9 ad 86 E0 8B C8 bd ff E8 20E134 0 3D 0 1 74 1A 7f 3 aa eb F3 2D FF 0 50 E8 F 0 5A F7 D8 8B D8 26 8A 1 aaE14f 4A 75 F9 EB de CB 57 BB 21 13 8B C1 40 F7 27 F7 F5 8B FB Ba 11
This is the world Hacker Programming competition first work (97 Mekka ' 4K intro competition), written in assembly language. The entire program is 4095 bytes long and generates a. com program with only 4 K, but it achieves the effect of 3D animation and a background music. The picture is a scene of the game spinning. Absolute cow.
1 Paste the following code into Notepad, save as a 1.txt document.
2 in the Command Line window (at the beginning → run →cmd), enter the document, enter the Debug
E10
Failure phenomena:Data Guard archive Gap, the tragedy is that the lost archive on the Main library was deleted by Rman Backup, the lost archive about 20, the database size of about 2T, if the Rebuild DG will be very time-consuming, so decided to use incremental backup to recover the DG, the main steps are as follows:1. Backup Repository spfile filesql> create pfile= '/home/ora/pfilerdg.ora ' from SPFile;2. View current standby SCNSql> Select To_char (CURRENT_SCN) from V$database;To_char (CURRENT
We know that the general routine of D3 is D3.selectall (' Path.mypath '). Data (Yourdataset). Enter (). Append (' path '). attr (' class ', ' MyPath '). attr ( ' d ', thepathstring)The acquisition of Thepathstring is usually generated based on the binding yourdataset. The specific generation methods are:1. Through the program itself section to piece together the D property of path, for example in D3V4 becau
principle:Several check codes are added to the data, and each bits of the data is assigned to several parity groups.Set: The number of check bits is R, can represent 2^r information, one means "no error", 2^r-1 to indicate the error occurred in which one.k= 2^r–1-r information can be used to correct a data bit.2^r≥k+r+1To detect and correct a single error, while discovering two errors, the R,k should meet the following relationships: 2^r-1≥k+r (see table 3.8)How the check bit and data bits are a
, the composition of the code is: the data bits inserted between the K check digit, by expanding the distance to the time to check and error correction. For example: for 8-bit data, 4 check bits are required for verification. For example, make data bits: D7, D6, D5, D4, D3, D2, D1, D0, and check bit: P4, P3, P2, P1. Then encode the location:H12 H11 H10 H9 H8 H7 H6 H5 H4 H3 H2 H1D7 D6 D5 D4 P4 D3 D2 D1 P3 D0
55 open-source data visualization tools and 55 open-source tools
To do a good job, you must first sharpen the tool. This article briefly introduces 55 popular open-source data visualization tools, such as open-source protocols, home pages, documents, and cases, including the famous D3.js, R, Gephi, rapha CMDL, Processing. js, Tableau Public, Google Chart Tools, Arbor. js, data sources http://selection.datavisualization.ch/
1 Arbor. js
Type: Library
Te
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