Recent questions tagged go

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go - Using multiple interfaces in Golang

I'm learning Golang and as an exercise in using interfaces I'm building a toy program. I'm having some ... appropriate in the situation I have See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - what's wrong with golang constant overflows uint64

userid := 12345 did := (userid & ^(0xFFFF << 48)) when compiling this code, I got: ./xxxx.go:511: ... this and how to solve it ? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How do I store the private key of my server in google app engine?

I'm using "github.com/dgrijalva/jwt-go" to create JSON web tokens. When I hosted my server locally, I could use ... - url: /.* script: _go_app See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to unmarshal a json array with different type of value in it

For example: {["NewYork",123]} For json array is decoded as a go array, and go array is need to explicit define ... 't know How to deal with it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Goroutine execution inside an http handler

If I start a goroutine inside an http handler, is it going to complete even after returning the response ? Here ... is not going to complete? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to escape string while matching pattern in PostgreSQL

I want to find rows where a text column begins with a user given string, e.g. SELECT * FROM users WHERE name LIKE ... 9.1 and go-pgsql for Go. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Is there a recommended way to define common behaviour for collection of slices?

I am trying to get suggestion from the community in order to make the best practices. Please bear with me, ... all hears, to any suggestion. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Is there a jq wrapper for golang that can produce human readable JSON output?

I'm writing a go program (let's call it foo) that outputs JSON on the Standard Out. $ ./foo {" ... JSON input not prettifying JSON output. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to convert [1024]C.char to [1024]byte

How do I convert this C (array) type: char my_buf[BUF_SIZE]; to this Go (array) type: type buffer [C.BUF_SIZE] ... ]C.char) to type [1024]byte See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to get the variable name as in the source code (using reflect)

I'm trying to build an easy to use templating system. Basically I just want to create a slice with different variables ( ... , vName, v, -1) } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - "declared and not used" Error

I get this error saying that I'm not using a variable… but to my noob eyes, it looks like I am: func ... and scoping, but I'm not sure. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Get a pixel array from from golang image.Image

I need to get a pixel array in the form of []byte to be passed to the texImage2D method of a Contex ... looking for something like img.Pixels() See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - golang how to access interface fields

I have a function as below which decodes some json data and returns it as an interface package search func ... "%s", result.Params) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - time.Millisecond * int confusion

In the below example, if the 1000's are both int's (which I think they are) why would the bottom fail ... 1000 time.Sleep(i * time.Millisecond) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to get the stack trace pointing to actual error reason

Let's say I have some code like this: value, err := some3rdpartylib.DoSomething() if err != nil { panic(err) ... here")) Is this even possible? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to stop GoLand from auto removal of unused imports?

I am working with JetBrains GoLand and wondering if it's possible to somehow disable the auto removal ... information specifically for Goland. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to make a variable thread-safe

I'm relatively new to Go, and I need to make a variable thread-safe. I know in java you can just ... there any way to synchronize variables? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - golang map prints out of order

Why is the map printing out of order, and how do I get it in to order? package main import ( "fmt" ) ... 11-Novenber 6-June 8-August 3-March See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to mock functions in golang

I have written a simple package, which basically consists of a lot of getter functions. Each file in this package ... a way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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958 views

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go - Does db.Close() need to be called?

So far the hardest part of Go has been understanding how to organize code. It seems incredibly simple on it's ... .. Just trying to understand. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Generate all possible n-character passwords

As part of a learning-Go exercise, I'm writing a simplistic brute-force password cracker. To generate all possible ... them in memory at once. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Decode large stream JSON

I have a massive JSON array stored in a file ("file.json") I need to iterate through the array and do ... stream the JSON element by element? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - What is the difference between parameter and receiver

I am following a Go tutorial and am stuck as I cant understand a particular method signature: func (p *Page) save ... parameter to be in save(). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - How to compare two version number strings in golang

I have two strings (they are actually version numbers and they could be any version numbers) a := "1.05.00.0156" ... . How to do it in golang? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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924 views

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go - Stimulate code-inlining

Unlike in languages like C++, where you can explicitly state inline, in Go the compiler dynamically detects ... inline) is almost ridiculous. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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930 views

1 answer

go - Read contents of tar file without unzipping to disk

I have been able to loop through the files in a tar file, but I am stuck on how to read the contents of those files ... of %s: ", hdr.Name) } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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go - Writing powers of 10 as constants compactly

I'm reading the recently released The Go Programming Language, and it's been a joy so far (with Brian ... an exponentiation operator. Any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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886 views

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go - Logging http responses (in addition to requests)

I am using Go and the Gorilla web toolkit's mux and handler packages to build a complex application, part of ... that I have not considered? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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