Use Request.Header to access all headers. Because Header is a map[string][]string, two loops are required to access all headers. // Loop over header names for name, values := range r.Header { // Loop over all values for the name. for _, value := range values { fmt.Println(name, value) } }
You will need to use a map (of type map[string]interface{}) to work with dynamic JSON. Here is an example of creating a new map: // Initial declaration m := map[string]interface{}{ “key”: “value”, } // Dynamically add a sub-map m[“sub”] = map[string]interface{}{ “deepKey”: “deepValue”, } Unmarshalling JSON into a map looks like: var f interface{} err … Read more
There is go-eval from the same author as igo. It’s an improvement on the old exp/eval package. However, I was not able to import packages due to missing symbols, which is probably the reason for igo not supporting the import statement. It’s probably the best to go with compile/execute software as seen on play.golang.org.
So what about this ‘cmd’ folder? The post has already made it clear, to summarise: It’s not a magic nor standard in Go. It’s just a convention. You can have multiple binaries when putting them into a sub-folder which is not possible in the root folder. By making you taking your binary as a client … Read more
You can configure delve in the vscode settings.json. There is a parameter called “maxStringLen” you can set it to a higher value. I do not recommend setting the values to high. The debugger can get very slow if you set the maxStringLen, maxArrayValues, etc. to high. So if you play arround with these delve settings … Read more
From Go’s FAQ, The standard library’s purpose is to support the runtime, connect to the operating system, and provide key functionality that many Go programs require, such as formatted I/O and networking. It also contains elements important for web programming, including cryptography and support for standards like HTTP, JSON, and XML. There is no clear … Read more
The index function is what I was looking for. It can lookup arbitrary strings in the map. $ docker inspect -f ‘{{ index .Config.Labels “com.wherever.foo” }}’ foo bang
You can use interface types as arguments, in which case you can call the function with any type that implements the given interface. In Go types automatically implement any interfaces if they have the interface’s methods. So if you want to accept all possible types, you can use empty interface (interface{}) since all types implement … Read more
There is no difference in behavior. There is a difference in performance. Mutexes are slow, due to the setup and teardown, and due to the fact that they block other goroutines for the duration of the lock. Atomic operations are fast because they use an atomic CPU instruction (when possible), rather than relying on external … Read more
A simple command in the terminal helped me: brew upgrade go GoLang has been updated, I have restarted the project, and everything is working