. All rights reserved .? Commit point reached-logical record count 3 [ora10g @ killdb dul] $? -- Verify the test_clob_1 data www.killdb.com> show userUSER is "ROGER" www.killdb.com> select * from test_clob_1 ;? Id name ---------- ----------------------------------------------------------- 1 br1N-V 2 B ^ rN 3? Www.killdb.com>
We can see that it is almost all garbled.
At first, I opened the lob file generated by unload with UE and compared it to find that it exists in unicode mode. Therefore, we n
command, and Ctrl-T is used for the tn command or Ctrl-C for the tn3270 command. to change the telnet Escape Sequence, set TNESC to the octal value of the expected character. then export TNESC. for example, set TNESC to 35 and change the vertical column of telnet to Ctrl-].
MAP3270 specifies a backup file that contains the user's 3270 keyboard ing. The MAP3270 variable must contain the full path name of the backup file. Create a backup file in the same format as the default file/etc/map3270.
RM
position of the cursor.WriteclipboardWrites data from the Clipboard to the current position of the file or disk fan, without changing the current position of the cursor and overwriting data from the location of the current cursor.Convert Param1 Param2Converts the data in the current active file from one format to another format. Valid parameters are Ansi,ibm,ebcdic,binary,hexascii,intelhex,motorolas, Base64, uucode, lowercase, and uppercase, with the
conversion.In short, still can not and solve garbled problem.3. Later, when learning beautiful soup:Http://www.crummy.com/software/BeautifulSoup/documentation.zh.html#contentsBeautiful Soup will try different encodings sequentially to convert your document to Unicode:
fromEncodinga constructor that can pass the encoding type to soup by parameter
Find the encoding type through the document itself: for example, XML declarations or meta tags for HTML documents http-equiv . If beautifu
Python modules that require research and learning to use python for crawling
1. the built-in urllib and urllib2 library are used to crawl data.
2. Use BeautifulSoup for data cleansing
Http://www.crummy.com/software/BeautifulSoup/
Encoding Rules
Beautiful Soup tries the following encodings, in order of priority, to turn your document into Unicode:
1 An encoding you pass in as the fromEncoding argument to the soup constructor.
2 An encoding discovered in the document itself: for instance, in an XM
science. The most widely used is the transfer of table data between programs, which operate on incompatible formats (usually private and/or non-standard formats ). Because a large number of programs support some CSV variants, at least as an optional input/output format.
"CSV" is not a single, clearly defined format (although RFC 4180 has a commonly used definition ). Therefore, in practice, the term "CSV" generally refers to any file with the following features:
(1) plain text, using a characte
least as an optional input/output format."CSV" refers to any file that has the following characteristics:
Plain text, using a character set such as ASCII, Unicode, EBCDIC, or GB2312;
Consists of records (typically one record per line);
Each record is delimited by a delimiter as a field (a typical delimiter has commas, semicolons, or tabs; sometimes separators can include optional spaces);
Each record has the same field sequence.
]View PlainCopy
/* Enter an integer, Output binary form */
#include
void To_binary (unsigned long n);
int main (void)
{
unsigned long number;
printf ("Enter an integer (Q to quit):/n");
while (scanf ("%ul", number) ==1)
{
printf ("Binary equivalent:");
To_binary (number);
Putchar ('/n ');
printf ("Enter an integer (Q to quit):/n");
}
printf ("done./n");
return 0;
}
void To_binary (unsigned long n)/ * Recursive function * /
{
int R;
r=
operations and Disk Management1. Knowledge points1) The DD command is used to convert and copy files, but its replication differs from CP. As mentioned earlier about Linux, everything is file, on Linux, hardware device drivers (such as hard disk) and special device files (such as/dev/zero and/dev/random) are like ordinary files, as long as the corresponding function in the respective driver, DD You can also read from and/or write to these files. In this way, DD can also be used in tasks such as
differs from cp . Before mentioning a very important point about Linux, everything is files , on Linux, hardware device drivers (such as hard disk) and special device files (such as /dev/zero and /dev/random ) are like ordinary files, as long as the respective drivers to achieve the corresponding function, DD You can also read from and/or write to these files. This dd can also be used in tasks such as backing up the boot sector of the hardware, obtaining a certain amount of random data, or empt
*/2#include 3 voidTo_binary (unsignedLongn);4 5 intMainvoid)6 {7UnsignedLongNumber ;8printf"Enter An integer (Q to quit):/n");9 while(SCANF ("%ul", number) = =1)Ten { Oneprintf"Binary equivalent:"); A to_binary (number); -Putchar ('/ N'); -printf"Enter An integer (Q to quit):/n"); the } -printf"done./n"); - return 0; - + } - voidTo_binary (unsignedLongN/*Recursive Functions*/ + { A intR; atr=n%2;/*computes the value of the n%2 before the recursive call, and then outputs after the r
Menu barMonitor monitors the real-time information of the networkCapture captures the corresponding message according to the conditions that define the "Capture class filter"Display according to the captured message according to the "Display class filter" related conditions for two filter or multiple filterFilter filtersThe filter is divided into three kinds, the filter used for monitoring, the filter used for capturing, filter filter,The Physical address tag is written as a continuous 16-digit
is transmitted through this way, the main is to be received from the lower layer of data segmentation and transmission, to the destination address and then reorganization, often this layer of data called a segment. Session Layer: Establish, manage, and terminate sessions. That is, through the transport Layer (port number: Transport port and receive port) to establish the path of data transmission, mainly between your system to initiate a session or accept a session request (between the device
EBCDIC is ASCII.EBCDIC convert ASCII to EBCDIC.IBM converts ASCII to alternate EBCDIC.Block converts each row to a cbs-length record, and the insufficient portion is padded with spaces.Unblock the length of each line is CBS, and the insufficient portion is padded with spaces.LCase converts uppercase characters to lowercase characters.UCase converts lowercase characters to uppercase characters.Swab swap each byte of the input.NoError does not stop whe
-description ' delimiter= ': ';What if the data is tab-delimited? It's a bit of a hassle, but it's still under control. At this point, a hexadecimal character represents tab, for exampleFor ASCII files, infile ' file-description ' dlm= ' x;For EBCDIC files, infile ' file-description ' dlm= ' x;3. Read in fixed column--mode 1: Column inputMany of the data is stored in a fixed column (columns) in the form of a file. Read into this type of file can be en
be used to authenticate files or messages on the system or between users. HMAC is an example of this function.
CRC (cyclic redundancy check): cyclic redundancy check code. CRC check is widely used in various data verification applications due to its simple implementation and high error checking capability. It occupies less system resources and can be implemented using software and hardware. It is a good method for data transmission error detection (CRC is not a strictly hashed algorithm, howeve
used to convert and copy files, but its replication differs from cp . Before mentioning a very important point about Linux, everything is files , on Linux, hardware device drivers (such as hard disk) and special device files (such as /dev/zero and /dev/random ) are like ordinary files, as long as the respective drivers to achieve the corresponding function, DD You can also read or write to these files. This dd can also be used in tasks such as backing up the boot sector of the hardware, obtaini
process between hosts, which is responsible for establishing, managing, and terminating sessions between processes. The session layer also uses the insertion of checkpoints in the data to synchronize data. Typical protocol representatives: RPC, SQL, NFS, NetBIOS, SCP, ASP, SSH, Winsock, BSD sockets
presentation Layer (Presentation) : Transforms the upper data or information to ensure that one host application layer information can be understood by another host's application. The data transfor
received data again and delivers the received data to the application layer in the correct order. 5. Automatic discard duplication mechanism: Since the IP datagram will repeat, the TCP receiver must discard repeated data. 6. Traffic Control: TCP also provides traffic control. Each side of a TCP connection has a fixed buffer space. The TCP receiving end only allows the other end to send data that can be accepted by the receiving end buffer. This will prevent the buffer overflow of the slow host
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