"mainfloat64 = 1.2345pointer := reflect.ValueOf(num)value := reflect.ValueOf(num)// 可以理解为“强制转换”,但是需要注意的时候,转换的时候,如果转换的类型不完全符合,则直接panic// Golang 对类型要求非常严格,类型一定要完全符合// 如下两个,一个是*float64,一个是float64,如果弄混,则会panicconvertPointer := pointer.Interface().(*float64)convertValue := value.Interface().(float64)fmt.Println(convertPointer)fmt.Println(convertValue)}运行结果:0xc42000e2381.2345
Description
When converting, if the type of conversion is not fully complian
, is too large, memory consumption is not flattering, made to put on the cloud disk also did not continue to do optimization.
Do not want to talk about technology here today, also did not want to talk about technology, so many programmers were killed in heaven, it is estimated that their technology is too bull X, the indigenous companies in the choice of heaven people when everyone's unanimous opinion is that the day, to sacrifice, but also to find a good programmer sacrifice;
With the
and assignmentCan be initialized directly when creating a map variable,MyMap = map[string] PersonInfo {"1234": personinfo{"1", "Jack", "Box 101, ..."},}or assign a value directly to the key:mymap["1234"] = personinfo{"1", "Jack", "Box 101, ..."}
C. Deletion of elementsDelete the elements within the container directly using the Delete (Map container, key value) function.
For example: Delete (MyMap, "1234");
D. Searching for elementsThe map lookup in Golang
This is a creation in
Article, where the information may have evolved or changed.
Preface: This paper mainly expounds the use of if else, switch statement and for loop in Golang.
One, if Else statement
1.1 Basic syntax
In some cases, the parentheses on either side of the conditional statement can be omitted, and when the conditions are complex, you can use parentheses to make the code more readable. Conditions allowed are eligible, use , | | |
This is a creation in
Article, where the information may have evolved or changed.
go provides sync packet and channel to resolve synchronization and communication. The novice is more likely to create deadlocks for channel channels, and if the buffered channel also takes into account the rate at which the channel is put in and out of the data. Literally can understand, sync. Waitgroup is waiting for a group of threads to end. It implements a similar task queue structure where you can add tasks to
This is a created
article in which the information may have evolved or changed.
Background
Recently in the development of a monitoring data acquisition module, which needs to use the Golang os/exec package to execute the script, considering that the user-written script may cause the program to block, you need to set a time-out for the execution of the program, it was thought that this is a very simple program, But I did not think that the effect of
This is a creation in
Article, where the information may have evolved or changed.
Today began to enter the Golang language learning, Golang language installation and testing is no longer explained here. There is a lot of information on the network to reference.
Learning Golang Language (1): Hello World
Learning Golang
This is a creation in
Article, where the information may have evolved or changed.
Follow the "code technique" to learn Golang language, lazy for many days, today continue to explain the type of Golang. Today, the string is explained.
Learning Golang Language (1): Hello World
Learning
, eliminate big", we are "see Code, copy code, and finally write code." Here are a few entry-level code to see how to learn:
Web.go-quickstart is very simple, is to learn how his routes are implemented, how to write their own routes
Icub3d/home Road GitHub This is a go+ ANGULARJS implementation, see How to Do API application
Finally, I listed you can refer to the implementation of some of the
Learning Golang Language (1): Hello World
Learning Golang Language (2): Variables
Learning Golang Language (3): Type--Boolean and numeric types
Learning Golang Language (4): Type--string
Learning Golang Language (5): Type--array
Learning
This is a creation in
Article, where the information may have evolved or changed.
Http://www.brendaningram.com/blog/4-brendans-blog/19-12-benefits-of-golang-for-enterprise-systems
Benefits of Golang for Enterprise Systems
the Go programming Language (commonly known as Golang, and for the purposes of this article referring to version 1.2 or NE WER) was conce
This is a creation in
Article, where the information may have evolved or changed.
Choose Golang to do game server development
After six months of mobile game operation, maintenance, follow-up development, the next network game server-side development technology selection requirements are as follows: 1. System mature, there are large success stories 2. 3 Higher development efficiency. High performance, it is best to support parallel technology to make
, eliminate big", we are "see Code, copy code, and finally write code." Here are a few entry-level code to see how to learn:
Web.go-quickstart is very simple, is to learn how his routes are implemented, how to write their own routes
Icub3d/home Road GitHub This is a go+ ANGULARJS implementation, see How to Do API application
Finally, I listed you can refer to the implementation of some of the
looked at the third style, indeed some negative. So learn the lesson, write good is the king, my article I am the boss! Thanks again Xiha implanted Yang classmate)
If you don't have a C + + language experience, it's very rare to use pointers, a noun that you'll often hear in your career, but rarely used. Especially when to use *, when to use , only by rote hard to ingenious. In Golang, the use of pointers
This is a creation in
Article, where the information may have evolved or changed.
Learning Golang Language (1): Hello World
Learning Golang Language (2): Variables
Learning Golang Language (3): Type--Boolean and numeric types
Learning Golang Language (4): Type--string
Learning Gol
This is a creation in
Article, where the information may have evolved or changed.
English original
C1. The following actions can cause panic
P1. Closing the nil channel.
Instance:
func C1P1() { var ch chan int close(ch)}
Results
panic: close of nil channelgoroutine 1 [running]:panic(0x458300, 0xc82000a170) /home/wdy/go/src/runtime/panic.go:464 +0x3e6main.main() /home/wdy/learn/program-
, which is very powerful.
Func (poem *poem) recite (v. ... interface{}) {FMT. Println (v)}
where v ... interface{} indicates the indefinite meaning of the parameter, where V is the slice type, FMT. The Println method is also defined in this way. If you want to implement different functions according to different parameters, you need to detect the passed parameters within the method.
Interface
An important thing about object-oriented is the interface, and the interface in
Reply content:Basic syntax
Coding techniques, coding specifications
Various functions
Various PHP modules
Learn a CMS or two-time development
Learn about Pdo,ado, data-driven layers, and learn MySQL on the go
Error mechanism
Object oriented
Use a framework to help develop
Magic method
Design Patterns
Reflection
Write all kinds of tools, drivers.
Write a small fra
accessible, the project must be placed in the working directory of Go, and more specifically in the working directory src .
For example, my project can be placed in go_workspace\src\yitian\golang-study\golang-programming . Here, in order to differentiate between different third-party packages, a different directory hierarchy is required, such as the third-party library on most GitHub, at the directory leve
How does PHP communicate with Golang?
Recently encountered a scene: PHP project needs to use a third-party function (stuttering participle), and on GitHub there is a class library written in Golang. So the question is, how do you achieve communication between different languages?The general scenario:
Write a http/tcp service with Golang, PHP communic
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.