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  Communicating Between Widgets in a Rich Internet Application

As a part of our October Free Dojo Support initiative, we received the following question from Manu Subramanian about how to manage communication between distinct components in a rich internet application: We are building an application with dojo. It does have many inter connected interface parts. For example it does have a top bar with drop down buttons. The menu items opens tabs in a tab controller. In general we need to call functions from different widgets or there are many interconne...

   Internet application,Rick internet,Widget,comminucation     2012-03-16 10:49:36

  New function signal.NotifyContext in GoLang 1.16

os/signal package in GoLang may not be frequently used but it provides some good features like Shutdown() which can be used to gracefully shutdown a running HTTP server. func (srv *Server) Shutdown(ctx context.Context) error With this function, there is no need to use third party library to gracefully shutdown HTTP server. How is it being used? package main import ( "context" "fmt" "net/http" "os" "os/signal" "time" ) func main() { server := http.Server{ Addr: ":8080", } http.Handl...

   GOLANG,NOTIFYCONTEXT,GRACEFUL SHUTDOWN     2021-06-19 01:07:10

  How to Understand and Use nil in Golang Correctly?

In Golang, nil is a predefined identifier that carries different meanings in various contexts, but typically represents "none", "empty" or "zero value". It can be assigned to variables of pointer, slice, map, channel, function, and interface types. Understanding the significance of nil is crucial for writing robust Go programs, as mishandling nil can lead to unexpected issues. nil in Pointers In Go, pointers are a fundamental type that stores the memory address of a variable. When a pointer is d...

   FUNCTION,SLICE,MAP,CHANNEL,GOLANG,NIL     2024-01-05 05:19:40

  What is the use of empty struct in GoLang

In Go, an empty struct struct{} is a struct with no fields that may appear to be of little use, but in reality, it can be useful in certain situations and become a simple and efficient solution in code. As a semaphore or lock Because the empty struct has no fields, it can be conveniently used to implement some concurrency control functions, such as mutex locks, read-write locks. We can use chan struct{} to implement an unbuffered channel for controlling concurrent access. package main import ( ...

   GOLANG,EMPTY STRUCT     2024-04-05 23:54:03

  Why init() is not recommended in Go

golangci lint Currently, the unified CI's .golangci.yml includes the gochecknoinits checker: # golangci-lint v1.46.2 # https://golangci-lint.run/usage/linters linters: disable-all: true enable: ... - gochecknoinits # Checks that no init functions are present in Go code. ref: https://github.com/leighmcculloch/gochecknoinits ... If Go code uses the init() function, the following error will occur: # golangci-lint run foo/foo.go:3:1: don't use `init` function (gochecknoinits) func i...

   GOLANG,INIT(),SYNC.ONCE,PANIC     2024-05-10 07:46:18

  Ensuring Go Interface Implementation: A Quick Guide

Introduction Go's simplicity and power shine in its interface system, offering a clean way to define contracts between types. However, when it comes to checking whether a struct satisfies an interface, Go's static typing philosophy means there isn't a direct runtime check. In this concise guide, we'll explore practical methods, including some lesser-known tricks, to verify whether a struct implements an interface. Method 1: Type Assertion and a Dummy Method package main import "fmt" type MyInt...

   INTERFACE,GOLANG,IMPLEMENTS     2023-11-25 21:36:01

  Install LAMP in two easy steps

You might have seen my earlier post related to installing PHP, Apache and MySQL on UBUNTU 11.10. That process contains number of steps and some lengthy commands which we can not remember easily. After good comments from Gaurav and Coward I have managed to get that lengthy process in just 2 steps. So I thought its great to share with all readers to they can get benefit as...

   LAMP,PHP,Steps,Tutorial     2012-04-30 09:15:28

  Build RPM package on Linux

1. Check the OS version and core version #uname -a #more /etc/redhat-release 2. Create relative directories /usr/src/redhat/SOURCES    //Store source codes, patches, icons etc /usr/src/redhat/SPECS        //Store specs about the process of building RPM packages /usr/src/redhat/BUILD     //File after uncompressed are stored here /usr/src/redhat/RPMS     //Store the binary files built with rpmbuild /usr/src/redhat/SRPMS&nbs...

   RPM,Linux,Build     2013-03-22 12:44:29

  Some useful code editors for developers

A good code editor will save developers much work. It can help developers find syntax errors easily through code highlight capability. It also makes the code more readable and maintainable through the indentation. Here we recommend some excellent code editors which you may want to have a try. Compilr Compilr is an online IDE, it supports 8 languages as of now including : C, C++,C#,Java,JavaScript,PHP ,Python,Ruby and Visual Basic. Compilr is developed by Ninjia Otter Inc in Canada. CodeMirrow C...

   Code editor,Code highlight     2013-03-20 12:25:13

  A guide on installing and setting up GitLab server on Ubuntu

GitHub, GitLab and BitBucket are the three most famous code hosting platform in the world. They have different features which allow teams or individuals to share code with others remotely. In case you want to build your own code hosting server so that you can host and share the code by yourself, you can install and set up your own server. In this post, we will walk you through a guide on installing and setting up GitLab server on Linux environment. gitlab is a web based code hosting tool which i...

   UBUNTU,TUTORIAL,GITLAB     2020-04-25 07:05:33

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