1. arithmetic operation points
(1) shift operation
① Original code shift: the original code does not change the form of the original code when performing arithmetic shift left or arithmetic shift right. Shifts one digit to the left is equal to
5.1.2 function call mechanismIn the previous study, we mentioned the concept of "call function" many times. The so-called function, that is, the execution of control of the program from the caller (a function) to the called function, while passing
The relational model has three important components:
Data. All the data in the database and its interlinkages are organized into "relationships" (two-dimensional forms).
Data manipulation. The relational model provides a complete set
&, ^ ,! And | operators are called logical operators. Operators are used to connect computing objects with C # syntax. Operators are called logical expressions. Logical operator "!" And "^" only act on the subsequent operands, so it is called The
Js floating-point operations and js floating-point operations
Problem Introduction: today, when processing the phase multiplication of two numbers in front-end js, there is a precision deviation: 1.2*3 = 3.9999999995, which should have been 3.6.
directory of this document
First, arithmetic operators
Second, assignment operator
The increment operator and the self-decrement operator
Iv. sizeof
Five, comma operator
Vi. Relational operators
Seven, logical
One, Java bit operation1. Presentation method:In the Java language, the binary number is represented by a complement, the highest bit is the sign bit, the sign bit for positive numbers is 0, and the negative is 1. The complement representation needs
Turn... Bit operations in C #, non-logical ~, Logical and &, logical or |, logical XOR or ^, logical left shift
In C #, we will use in-place operations. For example, to determine whether a number is the power of 2, how to determine whether a
in C #, you can perform a bitwise logical operation on an integer operand. The meaning of the bitwise logical operation is that each bit of the operand is taken sequentially, and the logical operation of each bit is the result of each bit of the
numpy common function Records
Arange ([Start,] stop[, SETP,], Dtype = None):
The function returns a ndarray type of data, rather than a list type data, in which the start parameter specifies the starting position of the array to be created, the
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