Info on Enumerations as dictionary keys: From the Swift book: Enumeration member values without associated values (as described in Enumerations) are also hashable by default. However, your Enumeration does have a member value with an associated value, so Hashable conformance has to be added manually by you. Solution The problem with your implementation, is that … Read more
If you use it inside Visual Studio… From Visual Studio Code Analysis Team Blog To add a custom dictionary to a C# and Visual Basic project is simple: In Solution Explorer, right-click on the project and choose Add -> New Item… Under Templates, select XML File, enter a name for the dictionary, such as CodeAnalysisDictionary.xml … Read more
use: let jsonDic = NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.MutableContainers, error: &error) as Dictionary<String, AnyObject>;
A map allows looking up values by keys. So: print(_results[“Key_1”]); // prints “Value_1” A map is not a list of pairs, you cannot access by index. You can access the keys, values and entries (pairs of key and value) as Iterables. for (var key in _results.keys) print(key); // prints Key_1 then Key_2 for (var value … Read more
A secure way to process unknown interfaces, just use fmt.Sprintf() https://play.golang.org/p/gOiyD4KpQGz package main import ( “fmt” ) func main() { mapInterface := make(map[interface{}]interface{}) mapString := make(map[string]string) mapInterface[“k1”] = 1 mapInterface[3] = “hello” mapInterface[“world”] = 1.05 for key, value := range mapInterface { strKey := fmt.Sprintf(“%v”, key) strValue := fmt.Sprintf(“%v”, value) mapString[strKey] = strValue } fmt.Printf(“%#v”, … Read more
I would probably use a constructor to do this: func NewGraph() *Graph { var g Graph g.connections = make(map[Vertex][]Vertex) return &g } I’ve found this example in the standard image/jpeg package (not with a map though, but with a slice): type Alpha struct { Pix []uint8 Stride int Rect Rectangle } func NewAlpha(r Rectangle) *Alpha … Read more
From https://golang.org/ref/spec#Constants: A constant value is represented by a rune, integer, floating-point, imaginary, or string literal, an identifier denoting a constant, a constant expression, a conversion with a result that is a constant, or the result value of some built-in functions such as unsafe.Sizeof applied to any value, cap or len applied to some expressions, … Read more
Note that, even though the words added to the dictionary by each developer are stored in a separate file, IntelliJ IDEA takes the words added by all developers, and does not highlight any of them as typos. The storage in separate files was designed specifically to avoid merge conflicts when storing the dictionary in a … Read more
Generally speaking (without having access to the code where the error occurs) you have a few options. Here are two of them: sync.RWMutex Control access to the map with sync.RWMutex{}. Use this option if you have single reads and writes, not loops over the map. See RWMutex Here a sample with access control to someMap … 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