In Motoko, does HashMap<Text, File> gives value or reference when doing get(Key)?

Developers
1

This is my defined File class as below.

public class File() {
    let chunkHashMap = HashMap.HashMap<Nat, [Nat8]>(1, Nat.equal, Int.hash);
        public func insertChunk(chunkNumber : Nat, fileChunk : [Nat8]) {
            chunkHashMap.put(chunkNumber, fileChunk);
        };
    };

Now let’s say I have a hashmap as files = HashMap<Text, File>(1, Text.equal, Text.hash).

let isSuccess = switch(files.get(fileName)) {
     case(null) return false;
     case(?file) file.insertChunk(chunkNumber, fileChunk);
};
return isSuccess;

So, does above code will update the value for the corresponding key in hash-map “files”. So my main question is does files.get(fileName) returns reference to File class object?

2

Whatever is more efficient, usually by reference, but you can’t tell the difference, and that’s by design. See my answers here and here.

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