what does Caret sign do in Dart

Question

I am looking at some Flutter projects and I notice this codes:

  @override
  int get hashCode => todos.hashCode ^ isLoading.hashCode;

What is this ^ sign doing here? This line of code is found in the AppState of Flutter projects. Is this used to compare the before and after State?

This doesn't technically relate to your question, but I would recommend using `hashValues` from `dart:ui` instead of xor for custom hashCodes. See this answer for more details why https://stackoverflow.com/questions/263400/what-is-the-best-algorithm-for-an-overridden-system-object-gethashcode/263416#263416 — Jonah Williams, May 03 '18 at 04:42

score 4 · Answer 1 · answered May 03 '18 at 04:24

4

It is the bitwise XOR operator

https://www.dartlang.org/guides/language/language-tour#operators

answered May 03 '18 at 04:24

Günter Zöchbauer

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Ugh. I've been trying to use it for exponentiation. – Joe Lapp Dec 01 '19 at 18:12

score 0 · Answer 2 · answered Feb 09 '20 at 14:55

Below is the way to use XOR operator. I think this is not useful to you but it is helpful to some one who searching for XOR operation

Call below method encryptDecrypt("123456") . you will get output as abcdef

    String encryptDecrypt(String input) {
    int xorKey = "P".codeUnitAt(0);
    String output = "";
    int length = input.length;
    for (int i = 0; i < length; i++) {
      output = (output + String.fromCharCode((input[i].codeUnitAt(0) ^ xorKey)));
    }
    return output;
  }

what does Caret sign do in Dart

2 Answers2

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