node-gc | A thin pseudo-wrapper around the v8 garbage collector | Game Engine library
kandi X-RAY | node-gc Summary
kandi X-RAY | node-gc Summary
A thin pseudo-wrapper around the v8 garbage collector.
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QUESTION
I am sending notification to mobile device for which I have fcm tokens. On sending, I get a response that can for each fcm token have an error. I want to remove the invalid tokens that for sure will no longer work, but keep tokens that may have failed this time and could still work in the future.
I am using the node-gcm
package.
What are the possible values for the error
field in the response of each token.
What checks on this value should I be making to only delete the permanently invalid tokens ?
ANSWER
Answered 2022-Mar-11 at 04:54The two most common error codes that indicate that the token should be removed are messaging/invalid-registration-token
and messaging/registration-token-not-registered
.
I recommend basing your logic on this code in the functions-samples repo.
QUESTION
Typescript mapped types syntax is really obscure to me, but I will try to make myself clear.
Basically I want a type filter to return me only the keys of an object that have a type of an Class or an array of classes. After some tries, I ended up with this:
...ANSWER
Answered 2021-Dec-25 at 03:02You can't really distinguish an instance of a class
from any other object
in TypeScript or JavaScript. All objects have a constructor
property, even objects provided natively like Date
. Instead, you need to find some way to identify the class instances you'd like to preserve, and to distinguish them structurally from other object types.
The example classes you gave look like this:
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