Recent questions tagged Go

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go - Limiting amount of data read in the response to a HTTP GET request

I'm scraping HTML pages and have set up a HTTP client like so: client := *http.Client{ Transport: &http. ... accepts from a resource and stops? 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 - Variable scope inside if statements

I've just started learning Go today and have got stuck on variable scopes. I've ultimately confused about how to ... best way of solving 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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go - Create an empty text file

I've been reading and googling all over but I can't seem to find this simple answer. I have a function that reads ... , nil } return true, err } 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 - Quicker way to deepcopy objects in golang, JSON vs gob

I am using go 1.9. And I want to deepcopy value of object into another object. I try to do it with ... . 6.747μs, Total Difference 72.409084ms 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 - Where is Golang picking up root CAs from?

crypto/tls.Config.RootCAs states // RootCAs defines the set of root certificate authorities // that clients use when ... root CA to trust. 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 - A use case for importing with blank identifier in golang

The Go programming language specification states: "To import a package solely for its side-effects (initialization) ... this use case? 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 - Benefits of runtime.LockOSThread in Golang

Golang supports LockOSThread() to make current goroutine exclusively tied to current OS thread, and it can also ... benefit from this feature? 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 - Copy one struct to another where structs have same members and different types

I have two struct having the same members, I want to copy one struct to another, see the pseudo code below: type ... way to copy bar from foo? 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 - Connecting to MongoDB Atlas using Golang mgo: Persistent no reachable server to replica set

I have a replica set from MongoDB atlas, to which I can connect with ANY other language, and regular mongo client ... What could be the reason ? 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 - Are pointers dereferenced by default inside of methods?

I'm confused by methods on structs in Go. I've following along in a tutorial in which they have: func (p *Page) ... in C++. What am I missing? 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 - JSON field set to null vs field not there

Is there a way, in golang, to see if I can differentiate between a json field being set to null vs ... resources will be very appreciated! 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 - Why golang Lookup*** function can't provide a server parameter?

For nslookup command, it has nslookup somewhere.com some.dns.server. However, it seems that golang dnsclient only ... default /etc/resolv.conf. 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 does an empty select do?

I found the following code in net/http/httptest and wonder what the empty select statement does in Go. go s.Config. ... , s.URL) select {} } 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 - Image manipulation in Golang

I have the following: Background image (bi) Image1 (i1) Image3 (i2) I want to position i1 and i2 over bi ... Golang as a pseudo program? 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 - Gorm Golang orm associations

I'm using Go with the GORM ORM. I have the following structs. The relation is simple. One Town has ... t get working the expected result. 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 - Checking the equality of two slices

How can I check if two slices are equal? 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 - Removing fields from struct or hiding them in JSON Response

I've created an API in Go that, upon being called, performs a query, creates an instance of a ... NewEncoder(c.ResponseWriter).Encode(&msg) 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 check if the channel is still working in streadway/amqp RabbitMQ client?

I'm using github.com/streadway/amqp for my program. How should I make sure that the channel I'm using ... do this with streadway/amqp client? 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 any standard library to convert float64 to string with fix width with maximum number of significant digits?

Imagine for printing in a 12 fixed width table we need printing float64 numbers: fmt.Printf("%12.6g ", ... digits? Thanks in Advance. 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 - casting a cgo array into a slice

At the moment I do this for casting a CGO array of doubles into a slice of float64: doubleSlc := [6]C. ... /arrays of different types in 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 - How can I convert from int to hex

I want to convert from int to hex in Golang. In strconv, there is a method that converts strings to hex. Is ... get a hex string from an int? 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 unpack various form of integers in a byte buffer in Golang?

I need to extract various fields in a byte buffer. I came up with this solution: func (fs *FileSystem) ... reading from the file when 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 - Create a Map in Golang from database Rows

Basically after doing a query I'd like to take the resulting rows and produce a []map[string]interface{}, ... the database/sql/driver package? 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 Gorilla mux with http.FileServer returning 404

The problem I'm seeing is that I'm trying to use the http.FileServer with the Gorilla mux Router.Handle function. This ... p> </body> </html> ` 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 - Unmarshaling Into an Interface{} and Then Performing Type Assertion

I get a string through a rabbitmq message system. Before sending, I use json.Marshal, convert the outcome to string ... no success... 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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go - Does it make sense to have two packages in the same directory?

I have a project that provides a library (exports some funcs) and also must provide a command-line interface ( ... the CLI to another package? 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 - Why value stored in an interface is not addressable in Golang

Citing the golang wiki (https://github.com/golang/go/wiki/MethodSets#interfaces): "The concrete value stored in ... some hard design assumption? 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 - Pass slice as function argument, and modify the original slice

I know everything is passed by value in Go, meaning if I give a slice to a function and that function appends to ... } } return messages, nil } See Question&Answers more detail:os...

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

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