Recent questions tagged go

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go - Why can't I append to a slice that's the property of a struct in golang?

I'm trying to append a value to a golang slice, the code works if it's called in the first method, ... Any help would be greatly appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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go - Golang Operator Overloading

I understand that golang does not provide operator overloading, as it believe that it is increasing the complexity. ... the summed up variable. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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897 views

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go - How does the Go1 compiler work?

I've been dabbling with Go for about a month for a school project and I noticed the go/ast, go/token, go ... recognized by the new go compiler? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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943 views

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go - Struct in for loop initializer

Any idea why this struct expression in for loop initializer makes syntax error in compile-time? Pointer to struct works fine ... <- r } }() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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825 views

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go - How to get memory size of variable?

Does anybody know how to get memory size of the variable (int, string, []struct, etc) and print it? Is ... could store the value into a string See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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749 views

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go - Do we need to close the response object if an error occurs while calling http.Get(url)?

In the following code is it also necessary to close the response body in the error case: res, err := http.Get( ... err) } defer res.Body.Close() See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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871 views

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go - Function signature with no function body

When viewing the source for the math.Ceil method, I found this syntax where there's an exported function ... using it within the package? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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986 views

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go - nested struct initialization literals

How can I do this: type A struct { MemberA string } type B struct { A A MemberB string } ... ... literal struct member values like this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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716 views

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go - Decoding generic JSON objects to one of many formats

I am working on a general JSON based message passing protocol in Go. What I would like to do is have a ... formats that I am just missing. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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760 views

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go - Efficient paging in MongoDB using mgo

I've searched and found no Go solution to the problem, not with or without using mgo.v2, not on StackOverflow ... using the mgo.v2 driver? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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723 views

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go - time.Since() with months and years

I am trying to convert a timestamp like this: 2015-06-27T09:34:22+00:00 to a time since format so it ... better way of achieving what I want? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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963 views

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go - Making golang Gorilla CORS handler work

I have fairly simple setup here as described in the code below. But I am not able to get the CORS to work. I ... ", handlers.CORS()(router))) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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875 views

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go - Making golang Gorilla CORS handler work

I have fairly simple setup here as described in the code below. But I am not able to get the CORS to work. I ... ", handlers.CORS()(router))) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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686 views

1 answer

go - How to copy a map?

I'm trying to copy the contents of a map ( amap ) inside another one (aSuperMap) and then clear amap so that ... value plus all the old values. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

1 answer

go - How to execute an IN lookup in SQL using Golang?

What does Go want for the second param in this SQL query. I am trying to use the IN lookup in postgres. ... AND other_field IN (this, that); See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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686 views

1 answer

go - How to embed file for later parsing execution use

I am essentially trying to walk through a folder of html files. I want to embed them into the binary file and be ... temp.Execute(w, nil) } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

734 views

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go - Return pointer to local struct

I see some code samples with constructs like this: type point struct { x, y int } func newPoint() *point { ... allocated on the stack or heap? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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949 views

1 answer

go - Golang. What to use? http.ServeFile(..) or http.FileServer(..)?

I'm a little bit confused. Much of examples shows usage of both: http.ServeFile(..) and http.FileServer(. ... when requested file not found? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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682 views

1 answer

go - How to get the number of characters in a string

How can I get the number of characters of a string in Go? For example, if I have a string "hello" the ... encoded with two bytes in UTF-8. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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828 views

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go - What does an underscore in front of an import statement mean?

I saw this example from sqlite3 on GitHub : import ( "database/sql" "fmt" _ "github.com/mattn/go-sqlite3 ... front of an import statement means. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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729 views

1 answer

go - How to get the directory of the currently running file?

In nodejs I use __dirname . What is the equivalent of this in Golang? I have googled and found out this ... idiomatic way to do in Golang? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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633 views

1 answer

go - calling command with some arguments works but not with others but works from console

The following code works and outputs details of 10 processes. package main import ( "os/exec" ) func main() { print(top ... m using OS X 10.9.3. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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622 views

1 answer

go - Why doesn't my Makefile interpolate an expression in a command

I'm trying to write a super simple Makefile to run the tests in a Go project. The project's dependencies ... expression in a shell-like manner? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

1 answer

go - Capture or assign golang template output to variable

Within a template, how can I achieve this? {{$var := template "my-template"}} I just get "unexpected <template> in operand". See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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617 views

1 answer

go 1.8 plugin use custom interface

I want to use custom interface based on go plugin, but I found it's not support. Definition of filter.Filter ... go file is in another project. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

808 views

1 answer

go - Golang templates (and passing funcs to template)

I'm getting an error when I try and access a function I'm passing to my template: Error: template: struct.tpl: ... m doing that in my template). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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811 views

1 answer

go - golang: []byte(string) vs []byte(*string)

I'm curious as why Golang doesn't provide a []byte(*string) method. From a performance perspective, ... and would appreciate any clarification. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

745 views

1 answer

go - Conversion of time.Duration type microseconds value to milliseconds

I am using go-ping ( https://github.com/sparrc/go-ping )library of golang for unprivileged ICMP ping. timeout ... for both latency and jitter. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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