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Golang correct posture for error and exception handling
Errors and exceptions are two different concepts that are very easy to confuse. Many programmers are accustomed to seeing all anomalies as errors, without distinguishing between errors and exceptions, and, even if exceptions are thrown in the program, they are caught and converted into errors in a timely manner. On
Introduction JSON format is one of our most commonly used serialization formats, the go language as a Google-developed, known as the Internet language of the C language, and naturally the JSON format support is very good. But the go language is a strong type language, the format requirements are very strict and JSON format, although there are types, but not stable, the go language when parsing the source of non-strongly typed languages such as PHP serialized JSON, often encountered some problems
Golang Install
1. Download go1.8.3
First,download The Go program from the site:
Https://dl.google.com/go/go1.8.3.linux-amd64.tar.gz
2. Install into dir
TAR-XVF go1.8.3.linux-amd64.tar.gz-c/usr/local/
3. Configure the Golang
(1) Add the following lines to profile (/etc/profile)
# vim/etc/profile
# # #GOLANG env###
export goroot=/usr/local/go
export path= $PA
This is the first article in this Golang series.
What is Golang
Golang, also known as Go, is an open-source, compiled, static type of programming language developed by Google.
The primary purpose of Golang is to make it easy to develop high-availability and highly scalable Web applications.
Why Choose
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Article, where the information may have evolved or changed. In the fifth installment of this series, we will discuss cross-platform compilation of Go projects. Before reading this article, make sure you have read [previous] (https://studygolang.com/articles/12615) about "time Package and reload" article, or subscribe to our blog update reminders to get audio from this six-part follow-up article. -[Golang's pros and cons of DevOps development (one of six): Goroutines, Chann
environment layer is delegated for processing.
Environment layer: In action, process a synchronous message or asynchronous message, cast the domain object of the domain layer into the appropriate role, and let role interact to complete the business logic.
Domain layer: Includes not only the modeling of domain objects and their relationships, but also the explicit modeling of role roles of objects.
Basic implementation layer: provides common technical capabilities for other tiers, such
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Golang writing a simple image server
Image Server
The recent development process, encountered a problem, is a large number of fragmented image storage, finally I decided to study a simple image server to solve the image file storage performance problems. Here, write a blog post documenting the process of thought and the pits I've encountered.We know that Linux storage fi
variables to assign values, need two equal signs, such as I=3, j=4, but in go can be directly written:
ij34
Very easy. Suppose you want to exchange the value of a i,j, and you just need to write:
i , j = j, i //这就是go创新的地方
The initialization of variables is similar to the assignment of variables. Just give the assignment directly at the time of the variable declaration, and support three types of initialization in Golang:
var variable variable
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Title:golang Network Programming
Golang Network Programming
Go-shadowsocks is a very good example of learning Golang network programming. In this blog post, the keyThis paper expounds the implementation of service-side and client in several different protocols of Golang network
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Installing GOPROTOBUF
1. from Https://github.com/google/protobuf/releases get Protobuf compiler Protoc (downloadable to windows
wget https:// github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gz tar zxvf protobuf -2.6 . Span style= "Color:rgb (128,0,128)" >1 .tar.gzcd protobuf -2.6 . 1 /configuremakemake installprotoc -H
2. get Goprotobuf protobuf provided compiler plugin Proto
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Installing GOPROTOBUF
1. get protobuf compiler Protoc from https://github.com/google/protobuf/releases( binary version available for download to Windows
wget Https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gztar ZXVF PROTOBUF-2.6.1.TAR.GZCD Protobuf-2.6.1./configuremakemake installprotoc-h
2. get Goprotobuf Protobuf provided compiler plug-in Protoc-gen-go should be added
This is a creation in
Article, where the information may have evolved or changed.
Installing GOPROTOBUF
1. get protobuf compiler Protoc from https://github.com/google/protobuf/releases( binary version available for download to Windows
wget https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gztar ZXVF protobuf-2.6. 1 . TAR.GZCD protobuf-2.6. 1 . /configuremakemake Installprotoc -H
2. obtain the protobuf compiler plug-in protoc-gen-go provided by Goprotobuf(place
This is a creation in
Article, where the information may have evolved or changed.
Installing GOPROTOBUF
1. from Https://github.com/google/protobuf/releases get Protobuf compiler Protoc (downloadable to Windows
wget Https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gztar ZXVF PROTOBUF-2.6.1.TAR.GZCD Protobuf-2.6.1./configuremakemake installprotoc-h
NBSP;
2. get Goprotobuf Protobuf provided plug-in Protoc-gen-go (placed in $GOPATH/bin)
protoc us
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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 Golang Language (2): Variables
Le
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Previously seen in the performance comparison test article, is about node. js and Golang HTTP module, simple HelloWorld function, the original text in this:
http://www.cnblogs.com/QLeelulu/archive/2012/08/12/2635261.html#2447171
After this article, node. js and Golang are upgraded, node. JS is now 0.10, and
Install Golang
The http://golang.org/dl/can be downloaded to Golang. Installation Documentation: Http://golang.org/doc/install.
Hello Go
We first create a file Hello.go:
Copy Code code as follows:
Package Main
Import "FMT"
Func Main () {
Fmt. Printf ("Hello golang\n");
}
Execute this program:
Copy Code code as follow
Recently learning Golang, always want to experience the next concurrency in the end have more, will I big python strong how much. Learned the official tutorial HTTP service, using the Performance test Tool WRK test, found the result is very surprising ~WRK can refer to my blog, there are basic usage notes: http://blog.yuanzhaoyi.cn/2018/01/12/test.htmlTest command: wrk-t10-d1m-c200 http://127.0.0.1:8080Meaning: 10 thread, concurrent 200 link, lasts 1
Download Golang installation package: Http://www.golangtc.com/downloadHttps://code.google.com/p/go/downloads/list
Go1.4.darwin-amd64-osx10.8.pkg
go1.4 Mac OS X (x86 64-bit) PKG Installer
Set environment variable configuration goroot and Gopath:To create a directory under the Go folder: mkdir ~/go The following things put to. BASH_RC (or maybe. bash_profile or. zshrc) export Goroot=/usr/local/go export gopath= $HOME/ Goe
The type is described in the Golang document:
Named types, with type names such as int, int64, float, string, bool. There are also custom named types.Non-named type, no type name []string, map[string]string, [4]int. When comparing two named types, the type name must be the same; when comparing named and unnamed types, the underlying type is the same.
There are several forms of declaring variables:var a int//declaring a variable of type int
var b st
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