Posts with the tag go:

How to Create File Chooser in Gtk using gotk3 ?

If you just want the complete code snippet, here is it. package main import ( "github.com/gotk3/gotk3/gdk" "github.com/gotk3/gotk3/gtk" ) func main() { gtk.Init(nil) win, _ := gtk.WindowNew(gtk.WINDOW_TOPLEVEL) win.SetTitle("sample app") win.Connect("destroy", func() { gtk.MainQuit() }) grid, _ := gtk.GridNew() win.Add(grid) imgview, _ := gtk.ImageNew() pbuf, _ := gdk.PixbufNewFromFileAtScale("./img/default.png", 400, 400, true) imgview.SetFromPixbuf(pbuf) grid.Attach(imgview, 0, 0, 1, 1) textentry, _ := gtk.EntryNew() grid.AttachNextTo(textentry, imgview, gtk.POS_BOTTOM, 1, 1) btnChoose, _ := gtk.ButtonNewWithLabel("Choose An Image") grid.AttachNextTo(btnChoose, textentry, gtk.POS_BOTTOM, 1, 1) btnChoose.Connect("clicked", func() { dlg, _ := gtk.FileChooserDialogNewWith2Buttons( "choose an image", nil, gtk.FILE_CHOOSER_ACTION_OPEN, "Open", gtk.RESPONSE_OK, "Cancel", gtk.RESPONSE_CANCEL, ) dlg.SetDefaultResponse(gtk.RESPONSE_OK) filter, _ := gtk.FileFilterNew() filter.SetName("images") filter.AddMimeType("image/png") filter.AddMimeType("image/jpeg") filter.

How to Tune Garbage Collector in Go Language ?

How to set the GOGC value ? You can set its value in the terminal like this. GOGC=200 Or you can change it in yaml file of the environment variable when using docker or kubernetes. What is the default value of GOGC ? The default value of GOGC is 100 which means that the garbage collection process will run when the allocations doubled from previous allocations count. What can I do to reduce the effect of garbage collection in Go ? If your Go program has a large static data set, set the GOGC to a smaller percentage; for example GOGC=50.

Is Go better than PHP?

First, “web development” is a very broad term and might, therefore, mean a lot of things including server-side rendered HTML pages, JSON APIs, microservices, etc. Second, let’s define what makes a programming language qualify for web development. (sorted by importance) Ecosystem Tooling Libraries Developer market Success stories Maintainability Language design Ecosystem consistency Performance Asynchronous execution for increased throughput Low latency Raw number-crunching performance Infrastructure Hosting and deployment Memory usage and cost in general So, let’s get ready to compare! Ecosystem (it depends) Both PHP and Go have created huge web-development ecosystems but they are focusing on different goals.

Why Do People Use Go ?

People use Go programming language For various reasons. Here is all reasons in brief: Go is open-source but backed up by a large corporation (Google) It’s fast: to learn to build up to compile to arrange and install to scamper Go is a modern language Go is Simple It is Concurrent Static code analysis Garbage collected language Testing Support And now, let’s dive in each reason. Performance Most people come to Go from dynamic languages like Ruby, Python, JavaScript, PHP and similar.

Why Did Google Develop Go ?

Google has two tremendous problems. One of them is compile time. Back in the 1980’s, reasonable sized projects took hours to do a clean build. There were whole server farms dedicated to recompiling. You got a new “nightly build” and made modifications to that. Google builds things that are so ridiculously huge that it’s still like that in 2017. It takes 5 hours to rebuild chrome from scratch even on a big fat i7 system. The pain of compile time on these builds hurts so much that Google has invented build tools that separate the dependency analysis and compiling, just to gain a few percent in build time using conventional languages.

Go Programming Language

Go in a Nutshell is .. Imperative language Statically typed Syntax tokens similar to C (but less parentheses and no semicolons) and the structure to Oberon-2 Compiles to native code (no JVM) No classes, but structs with methods Interfaces No implementation inheritance. There’s type embedding, though. Functions are first class citizens Functions can return multiple values Has closures Pointers, but not pointer arithmetic Built-in concurrency primitives: Goroutines and Channels Basic Syntax of Go Programming Language Hello World Example File hello.go: package main import "fmt" func main() { fmt.Println("Hello, Go") } $ go run hello.go