You are not copying the map, but the reference to the map. Your delete thus modifies the values in both your original map and the super map. To copy a map, you have to use a for loop like this: for k,v := range originalMap { newMap[k] = v } Here’s an example from the … Read more
I like your reduce version just fine. I think it’s idiomatic. Here’s a version using list comprehension anyways. (defn foo [m f] (into {} (for [[k v] m] [k (f v)])))
Linux? With X, use xmodmap to alter the key mapping, e.g. xmodmap -e ‘clear Lock’ -e ‘keycode 0x42 = Escape’ Will map Esc to the CapsLock key. Google for more examples.
Like this: <c:forEach var=”entry” items=”${myMap}”> Key: <c:out value=”${entry.key}”/> Value: <c:out value=”${entry.value}”/> </c:forEach>
This is an old question, but here’s my two cents. PeterSO’s answer is slightly more concise, but slightly less efficient. You already know how big it’s going to be so you don’t even need to use append: keys := make([]int, len(mymap)) i := 0 for k := range mymap { keys[i] = k i++ } … Read more
In Go there are no reference types like you have them in C++. In Go everything is passed by value. When the term “reference type” is used in Go, it means a type that references to the data they ought to represent (via pointers). Slices are small, struct-like data structures represented by the type reflect.SliceHeader: … Read more
Using additionalPropertiesis the proper way to describe hashmap with OpenAPI (fka. Swagger) Specification but Swagger UI do not render them for now. The issue is tracked here https://github.com/swagger-api/swagger-ui/issues/1248 Meanwhile you can use this trick: define a non required property (defaultin the example below) of the same type of the map’s objects and give some hint … Read more
You can’t change values associated with keys in a map, you can only reassign values. This leaves you 2 possibilities: Store pointers in the map, so you can modify the pointed object (which is not inside the map data structure). Store struct values, but when you modify it, you need to reassign it to the … Read more
When working with dictionaries you have to remember that a key might not exist in the dictionary. For this reason, dictionaries always return optionals. So each time you access the dictionary by key you have to unwrap at each level as follows: bugsDict[“ladybug”]![“spotted”]![“red”]!++ I presume you know about optionals, but just to be clear, use … Read more
Yes it’s possible. In OpenAPI (fka. Swagger) 2.0 and 3.0, a hashmap is always a <string, something> map: The key is always a string and do not need to be defined. The value type is what you want and is defined with additionalProperties. Let’s say you want to describe a <string, string> hashmap like this … Read more