binary manipulation

1. Definition of a text file and a binary fileAs you know, computer storage is physically binary, so the difference between a text file and a binary file is not physical, but logical. The two are only different at the coding level.In short, text

1. Definition of a text file and a binary fileAs you know, computer storage is physically binary, so the difference between a text file and a binary file is not physical, but logical. The two are only different at the coding level.In short, text

  DML (Data Manipulation Language commands) Data Manipulation Language; DDL (Data Definition Language commands) Data Definition Language; TCC (Transaction Control commands) Transaction Control Language; SCC (System Control commands) system Control

"Here we are going to discuss some advanced bit manipulation techniques that will greatly increase the speed of your program if used properly" We have discussed some simple bit manipulation methods, and if you are not familiar with bit operations

1) String manipulationstrcpy (P, p1) copy stringstrncpy (P, p1, N) copies the specified length stringStrcat (P, p1) Append stringStrncat (P, p1, N) append a specified length stringStrlen (p) Take string lengthstrcmp (P, p1) compare stringsSTRCASECMP

I. Understanding the knowledge reserve before character encoding1, computer running program or read the principle of the fileIn order for the computer to run faster than the I/O operation slows down, the CPU does not read the data directly from the

OR (|) and (&) XOR (^) Left Shift ( Right Shift (>>) Not (~) 1|0=1 1&0=0 1^0=1 0010 1100>>2=0011 ~1=0 And and &Num & 1 can get the last digit of the integer num binary

string Conversion class functionsaddcslashes function: Use backslash to escape characters in a string in C language styleaddslashes function: Using a backslash to reference a stringChop function: Clears contiguous spaces in a

I. OverviewStrings are almost ubiquitous in JavaScript, and when you are working with the user's input data, when you read or set the properties of a DOM object, while manipulating the cookie, there are of course more .... The core part of

File content SubstitutionFor line in Flielinput.input ("filepath", inplace=1):line = Line.repace ("OldText", "NewText")Print line,The operation of files, folders (file manipulation functions) in Python involves both the OS module and the Shutil