Home  >  Article  >  Web Front-end  >  How to use implicit types? Summary of implicit type instance usage

How to use implicit types? Summary of implicit type instance usage

巴扎黑
巴扎黑Original
2017-06-12 14:08:511801browse

JavaScript data types are divided into six types, namely null, undefined, boolean, string, number, and object. object is a reference type, and the other five are basic types or primitive types. We can use the typeof method to print out which type something belongs to. To compare variables of different types, you must first convert the type, which is called type conversion. Type conversion is also called implicit conversion. Implicit conversions usually occur with the operators addition, subtraction, multiplication, division, equals, and less than, greater than, etc. . typeof '11' //string typeof(11) //number '11' < 4 //falseConversion of basic types Let's talk about addition, subtraction, multiplication and division first: 1. Add numbers to strings, and the numbers will be converted into words

1. A brief discussion of JavaScript Implicit type conversion

How to use implicit types? Summary of implicit type instance usage

Introduction: JavaScript data types are divided into six types, namely null, undefined,boolean,string,number,object. object is a reference type, and the other five are basic types or primitive types. We can use the typeof method to print out which type something belongs to. To compare variables of different types, you must first convert the type, which is called type conversion. Type conversion is also called implicit conversion. Implicit conversions usually occur with the operators addition, subtraction, multiplication, division, equals, and less than, greater than, etc. . typeof '11' //string ty..

2. C# Learning Diary 17---Display specific use cases for type conversion

How to use implicit types? Summary of implicit type instance usage

Introduction: In the type conversion of C#, in addition to the implicit type conversion introduced in the previous article, there is also a type conversion that needs to be declared by us. -----Display type conversion.

3. MySQL implicit type conversion traps and rules_MySQL

Introduction: This article first tells you about the traps encountered when converting MySQL implicit types through an example, and then introduces the rules of MySQL implicit types to you, which has certain advantages for you when operating mysql implicit types. Let’s take a look at the reference value.

4. You should know PHP floating point number knowledge, PHP floating point number knowledge_PHP tutorial

Introduction: You You should know PHP floating point number knowledge, PHP floating point number knowledge. You should know PHP floating point number knowledge. PHP floating point number knowledge. PHP is a weakly typed language. Such features inevitably require seamless and transparent implicit type conversion. PHP internally uses zval to save any

5. A common problem with PHP floating point numbers, a common problem with PHP floating point numbers_PHP tutorial

Introduction: A common problem with PHP floating point numbers , PHP floating point FAQ. A common problem with PHP floating point numbers. Common problems with PHP floating point numbers. PHP is a weakly typed language. Such features inevitably require seamless and transparent implicit type conversion. PHP uses zval internally to ensure

6. You should know PHP floating point number knowledge, PHP floating point number knowledge

Introduction: You should know PHP floating point number knowledge, PHP floating point number Knowledge. You should know PHP floating point number knowledge. PHP floating point number knowledge. PHP is a weakly typed language. Such features inevitably require seamless and transparent implicit type conversion. PHP internally uses zval to save any

7. A common problem with PHP floating point numbers, a common problem with PHP floating point numbers

Introduction: A common problem with PHP floating point numbers, PHP floating point numbers Points FAQ. A common problem with PHP floating point numbers. Common problems with PHP floating point numbers. PHP is a weakly typed language. Such features inevitably require seamless and transparent implicit type conversion. PHP uses zval internally to ensure

8. Performance issues caused by implicit conversion of clob plus ||

Introduction: CLOB will consume so much current mode read and consistent read during implicit type conversion (it will also cause a spike in db block changes and db block gets), which means the CPU will spike. SQL drop table t_clob; SQL create table t_clob(id number,cb clob); SQL insert into t_clob values

9. A brief analysis of implicit type conversion in JavaScript_javascript Tips

Introduction: This article mainly provides a detailed analysis and introduction to implicit type conversion in JavaScript. Friends who need it can come and refer to it. I hope it will be helpful to everyone. Help

10. A brief introduction to implicit type conversion of JavaScript data types_javascript skills

Introduction: This article The article mainly introduces relevant information that briefly introduces implicit type conversion of JavaScript data types. Friends who need it can refer to

##[Related Q&A Recommendations]:

javascript - Implicit type conversion in js

The above is the detailed content of How to use implicit types? Summary of implicit type instance usage. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn