how go determines whether two interface types are the same, and assigns one interface to the other interface ...
topic description as shown in the question, if you know the GPS coordinates of five points, how to find the sixth point and minimize the sum of the distances from the other five points, and find out his GPS coordinates would like to ask if you have ...
topic description how does exercism get the answer, know the question type, but don t know how to get the answer? https: exercism.io my tracks related codes what result do you expect? What is the error message actually seen? I hope the b...
The frames used by are gin and gorm . Now the front-end request interface is uploaded and is a timestamp. What should be done to automatically convert the received timestamp to time.Time . What comes from the front end is an json data. Parsing is a p...
has the following code: type B struct { Id int `json:"id"` Name string `json:"name"` } type A struct { Bs []*B } func New() *A { return &A{ Bs: make([]*B, 0), } } func (a *A) Read() { a.Bs...
is there a desktop framework for go + WebAssembly + [chrome electron] PS: 2019-04-48 see a library of vugu , which is quite good ...
cols, err := rows.Columns() Remember to check err afterwards vals := make([]interface{}, len(cols)) for i, _ := range cols { vals[i] = new(sql.RawBytes) } for rows.Next() { err = rows.Scan(vals...) Now you can check each element of vals...
write Mini Game for the first time. ask: frame synchronization: the server broadcasts to the user at a frequency of 60 seconds. Or broadcast to other users as soon as you receive a user message? does bullet launch broadcast information about eac...
problem description I have been in contact with golang for some time, and recently I am trying to set up an environment of golang compiler source code on my PC. I believe that I can learn more about the essence of golang through debugging. I believe t...
when a novice learns redis and tries a redis lock, the go code is as follows: while(true) { xxxxxxx } grab the lock. So I wonder if the real production environment is also realized in this way. I was wrong in the first place. If you have releva...
all I want is the number of decimal places, that is, how many decimal places there are. Thank you ...
I want to execute a function with no return value in template. How can I do that? this function is hung on an entity, and when I execute it, template reports an error, saying that the function does not have any return value. Can golang template only e...
what is the most elegant way to return float64 after rounding 2 decimal places in the go language float64? ...
what should you do if the ip of the server is dynamic and you want to connect to the database with ip whitelist on another server I tried to fill in the whitelist of the database with the domain name after ddns, and found that it didn t work. How do ...
query: = elastic.NewTermQuery ( "category_id ", categoryId) result, e: = ES.GetEs (). Search (). Index ( "group_category "). Type ( "_ doc ") .query (query) .sort ( "img_date ", false) .Do (context.Background ()) in this way, the search returns all t...
read the consensus to use dpos, but I don t quite understand, what is the meaning of choosing the Packer code? The code is as follows, students who know or understand, please guide. Source code location: https: github.com meitu go-e... func (ec *Ep...
The code is as follows: package main import ( "fmt" "io" "os" ) func main() { f := openFile() useFile(f) useFile2(f) } func openFile() *os.File { hello.txt world f, _ := os.Open(&quo...
The code is as follows: why does the input timestamp change and the resulting result is the same in a certain interval? main.go func PrevSlot(now int64) int64 { now = time.Now().Unix() var blockInterval = int64(10) result := int64((no...
I know that because golang.org is outside the wall, there is no need to talk about online methods. originally go get is an one-button command, and all dependencies are installed automatically. I manually clone all dependencies on github according to the...
recently I have seen that all the company s projects are switching to dig as di,ioc. I am very repulsive, but I feel that I don t have to be a maverick. I came to the community to ask all the bosses why so many people admire dig. to use dig, you real...
flutter has been set to use domestic images but packages get has been in running, to ask what the reason is. Is it because some packages are not in the domestic image or because I set them? thank you . ...
critical: Error listenerStart 2018-5-11 15:32:08 org.apache.catalina.core.StandardContext start critical: Context [ SCM] startup failed due to previous errors 2018-5-11 15:32:09 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc serio...
H5 video can be played normally on Android, but the page keeps refreshing on ios and the video cannot be played. Video format is mp4 ...
Thinkphp5 defines the route as a post , and how to customize the error when using get request if a post route is defined in application route.php in thinkphp5, as follows, how to customize the wrong content and return the wrong json when we req...
problem description use vue-cli3 to create a component that wants to be encapsulated as a third-party library and uploaded to npm for use by other projects, but vue-cli-service build-- target lib-- name lib1. src lib1.vue the packaged library cann...