GOLANG | Basic programs to understand go lang syntax and logic | Interpreter library

by abhinavmish96 Go Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | GOLANG Summary

GOLANG is a Go library typically used in Utilities, Interpreter applications. GOLANG has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Basic programs to understand go lang syntax and logic

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Quality

Security

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Support

GOLANG has a low active ecosystem.

It has 2 star(s) with 1 fork(s). There are no watchers for this library.

It had no major release in the last 6 months.

GOLANG has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of GOLANG is current.

Quality

GOLANG has 0 bugs and 0 code smells.

Security

GOLANG has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

GOLANG code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

GOLANG is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

GOLANG releases are not available. You will need to build from source code and install.

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GOLANG Key Features

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GOLANG Examples and Code Snippets

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Community Discussions

Trending Discussions on GOLANG

How can I instantiate a new pointer of type argument with generic Go?

interface contains type constraints: cannot use interface in conversion

package io/fs is not in GOROOT while building the go project

Golang with Cassandra db using docker-compose : cannot connect (gocql)

Cannot run debug Go using VSCode on Mac M1

Go Generics - Unions

Why doesn't dereferencing a nil pointer in unsafe.Sizeof() cause a panic?

Docker standard_init_linux.go:228: exec user process caused: no such file or directory

"Cannot use .this" error when using _ for multiple type parameters in method declaration

How to serve a NextJs frontend using Golang (Go) and gorilla/mux?

QUESTION

How can I instantiate a new pointer of type argument with generic Go?

Asked 2022-Mar-18 at 20:27

Now that type parameters are available on golang/go:master, I decided to give it a try. It seems that I'm running into a limitation I could not find in the Type Parameters Proposal. (Or I must have missed it).

I want to write a function which returns a slice of values of a generic type with the constraint of an interface type. If the passed type is an implementation with a pointer receiver, how can we instantiate it?

...

ANSWER

Answered 2021-Oct-15 at 01:50

Edit: see blackgreen's answer, which I also found later on my own while scanning through the same documentation they linked. I was going to edit this answer to update based on that, but now I don't have to. :-)

There is probably a better way—this one seems a bit clumsy—but I was able to work around this with reflect:

Source https://stackoverflow.com/questions/69573113

QUESTION

interface contains type constraints: cannot use interface in conversion

Asked 2022-Mar-17 at 15:48

type Number interface {
    int | int64 | float64
}

type NNumber interface {
}

//interface contains type constraints
//type NumberSlice []Number

type NNumberSlice []NNumber

func main() {
    var b interface{}
    b = interface{}(1)
    fmt.Println(b)

    // interface contains type constraints
    // cannot use interface Number in conversion (contains specific type constraints or is comparable)
    //a := []Number{Number(1), Number(2), Number(3), Number(4)}
    //fmt.Println(a)

    aa := []interface{}{interface{}(1), interface{}(2), interface{}(3), 4}
    fmt.Println(aa)

    aaa := []NNumber{NNumber(1), NNumber(2), NNumber(3), 4}
    fmt.Println(aaa)
}

...

ANSWER

Answered 2022-Mar-17 at 15:48

The language specifications explicitly disallow using interfaces with type elements as anything other than type parameter constraints (the quote is under the paragraph Interface types):

Interfaces that are not basic may only be used as type constraints, or as elements of other interfaces used as constraints. They cannot be the types of values or variables, or components of other, non-interface types.

An interface that embeds comparable or another non-basic interface is also non-basic. Your Number interface contains a union, hence it is non-basic too.

A few examples:

Source https://stackoverflow.com/questions/71073365

QUESTION

package io/fs is not in GOROOT while building the go project

Asked 2022-Mar-14 at 19:15

I don't have much experience in go but I have been tasked to execute a go project :)

So i need to build the go project and then execute it

Below is the error when i build the go project. Seems to be some dependency(package and io/fs) is missing

...

ANSWER

Answered 2021-Aug-12 at 05:56

This package requires go v1.16, please upgrade your go version or use the appropriate docker builder.

Source https://stackoverflow.com/questions/68752103

QUESTION

Golang with Cassandra db using docker-compose : cannot connect (gocql)

Asked 2022-Mar-08 at 17:28

I am trying to setup a cassandra DB and connect to it with a golang app.

this is my docker-compose

...

ANSWER

Answered 2022-Mar-08 at 17:28

Each container has its own localhost (127.0.0.1) address - you need to connect to IP address of your machine (if you use bridge), or maybe better to connect by the name (cassandra)

Source https://stackoverflow.com/questions/71398835

QUESTION

Cannot run debug Go using VSCode on Mac M1

Asked 2022-Mar-07 at 13:30

I found a topic that encounter the same problem (Can't debug Golang in vscode apple m1) but I'm not sure it's an old solution or not because I'm using the Go version

...

ANSWER

Answered 2021-Sep-27 at 22:37

Ensure your VSCode uses the arm64 version. (it can use a different go version from the system)
Run Go: install/update tools. It will rebuild all tools with the arm64 go version.

Source https://stackoverflow.com/questions/69343900

QUESTION

Go Generics - Unions

Asked 2022-Feb-20 at 19:49

I'm playing around with go generics by modifying a library I created for working with slices. I have a Difference function which accepts slices and returns a list of unique elements only found in one of the slices.

I modified the function to use generics and I'm trying to write unit tests with different types (e.g. strings and ints) but am having trouble with the union type. Here's what I have, now:

...

ANSWER

Answered 2021-Oct-29 at 19:33

I've passed your code through gotip that uses a more evolved implementation of the proposal and it does not complain about that part of the code, so I would assume that the problem is with the go2go initial implementation.

Please note that your implementation will not work since you can definitely use parametric interfaces in type assertion expressions, but you can't use interfaces with type lists as you are doing in testDifference[intOrString]

Source https://stackoverflow.com/questions/69772512

QUESTION

Why doesn't dereferencing a nil pointer in unsafe.Sizeof() cause a panic?

Asked 2022-Feb-10 at 11:32

https://go.dev/play/p/X_BH4qGgXHJ

...

ANSWER

Answered 2022-Feb-10 at 10:08

Spec: Package unsafe:

Calls to Alignof, Offsetof, and Sizeof are compile-time constant expressions of type uintptr.

These functions are evaluated at compile time, no actual dereferencing happens at runtime.

This is possible because the pointed value is not needed, only information about its type is needed, which does not need dereferencing.

It's also documented at unsafe.Sizeof():

The return value of Sizeof is a Go constant.

Constants in Go are compile-time constants.

Also see Spec: Constants:

A constant value is represented by a rune, integer, floating-point, imaginary, or string literal, an identifier denoting a constant, a constant expression, a conversion with a result that is a constant, or the result value of some built-in functions such as unsafe.Sizeof applied to any value, cap or len applied to some expressions, real and imag applied to a complex constant and complex applied to numeric constants.

See similar examples (which without passing them to unsafe.Sizeof() would panic at runtime or block indefinitely, but they work just fine):

Source https://stackoverflow.com/questions/71061359

QUESTION

Docker standard_init_linux.go:228: exec user process caused: no such file or directory

Asked 2022-Feb-08 at 20:49

Whenever I am trying to run the docker images, it is exiting in immediately.

...

ANSWER

Answered 2021-Aug-22 at 15:41

Since you're already using Docker, I'd suggest using a multi-stage build. Using a standard docker image like golang one can build an executable asset which is guaranteed to work with other docker linux images:

Source https://stackoverflow.com/questions/68881023

QUESTION

"Cannot use .this" error when using _ for multiple type parameters in method declaration

Asked 2022-Feb-01 at 13:11

I am playing around with type parameters (generics) using Go 1.18beta1.

Problem

Consider the following snippet:

...

ANSWER

Answered 2022-Feb-01 at 13:11

As mentioned in the comments of the question, the described behavior is a bug in Go 1.18beta1 and is being tracked by issue 50419.

Edit

I have confirmed that the bug in question is fixed in 1.18beta2, which was released on 31 January, 2022.

Source https://stackoverflow.com/questions/70572713

QUESTION

How to serve a NextJs frontend using Golang (Go) and gorilla/mux?

Asked 2022-Jan-02 at 19:54

I followed this example for serving a NextJs front end single-page application using Golang and the native net/http package:

...

ANSWER

Answered 2021-Dec-31 at 05:16

Please, try

Source https://stackoverflow.com/questions/70515112

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install GOLANG

You can download it from GitHub.

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