Arithmetic CodingIt is a lossless data compression method and an entropy encoding method. Unlike other entropy coding methods, other entropy coding methods usually divide input messages into symbols and encode each symbol, the arithmetic encoding

Algorithms and examples for parsing four arithmetic expressions in javascript, and four arithmetic operations in javascript
When writing code, we sometimes encounter the need to parse four arithmetic expressions by ourselves. This article briefly

First, the arithmetic coding definition
It is a non-grouping coding algorithm. It is based on the whole sequence, using recursive form of continuous coding. Instead of mapping a single source symbol into a code word, the symbol for the

1. Arithmetic left shift logic left
The arithmetic left shift and the logical left shift are the right 0:
Like 00101011.
Shift arithmetic left one: 01010110
Shift logic left one: 01010110
For binary values, the left-shift n-bit equals the

It 's written in front .
Just learn the description of the stack seems very boring, so I deliberately find a few more interesting examples, a deepening of the stack of understanding and use, two, can also open up the idea, this is the case of

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

When writing code we sometimes encounter situations where we need to parse the arithmetic expression ourselves, this article simply describes using JavaScript to implement the parsing of simple arithmetic expressions.
First, familiar with the

The content of this section is a bit dull, but very simple, remember, just like in elementary school we just learned subtraction mixed operation. Remember the priority of the operation. (Of course, if you have a C language or other basis, you can

The variables in the shell are stored as strings, even if you assign values to the value of the shape unless you declare the variable by declare-i.
In the case of numerical/arithmetic operations, you may find the following
$ x=121$ echo $x

An operator is a symbol that is often used when operations are performed with variables or constants, and there are 10 commonly used methods: arithmetic operators, relational operators, logical operators, bitwise operators, shift operators,

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