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percentage calculation method in css

CSS supports a variety of unit forms, such as percentage, px, pt, rem, etc. Percent and px are commonly used units. With the popularity of...

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Posted in Programming techniques

Web Developer Learning Roadmap

The following roadmap mainly shows the technical learning route of becoming a front-end developer, back-end developer, or operation and maintenance developer. Front-end learning roadmap The...

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Posted in Programming techniques

Subclass inheritance and call the constructor method of the parent class

Constructor method is used to initialize the object of the class. Unlike other members of the parent class, it cannot be inherited by the child...

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Posted in Programming techniques

C ++ 11 inheritance constructor

I. Problem description In the inheritance system, it is assumed that the derived class wants to use the constructor of the base class, which needs...

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Posted in Programming techniques

8 powerful Awk built-in variables

Awk has several very powerful built-in variables. Generally speaking, there are two types of built-in variables:-The first is that the defined variable can be changed,...

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Detailed Python super

Speaking of super, everyone may think it is very simple, isn't it just to call the parent method. If it were that simple, there wouldn't...

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Posted in Programming techniques

Java protected keywords

Many books that introduce the Java language (including "Java Programming Ideas") are relatively simple introduction to protected, basically a sentence, that is: protected modified members...

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Posted in Programming techniques

The main differences between Java floating point types float and double

To understand the range and precision of float and double, you must first understand how decimals are stored in computers: For example: 78.375, which is...

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Posted in Programming techniques

Find table length in lua

The official documentation describes it like this: The length operator is written as the unary operation #. The length of a string is its number...

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Posted in Programming techniques

Correct definition of macro definition, macro definition of trinocular operation

Abstract: Macros are divided into two categories: 1.Object-like macro is relatively simple for object macro, but it is not so simple.   2. Function-like macro...

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