I am working on a complex application with different types of errors, services, and domain concepts. In order to throw “object” errors, there are two different approaches that come to my mind: Applying Object.assign() to an Error object (easy option if I just need to throw a single or a couple of …
Firebase – How to extend FirebaseError?
I am implementing a cloud function for signing up with unique username and password. In order to throw exceptions, I was previously doing the following: signUpValidation.js signUp.function.js But, I don’t really like this way of throwing the exceptions in the signUpValidation module… it makes more…
Mosquitto and simple Paho JS Client
I am trying to get a simple mqtt broker set up and access it from a web page. I have had pretty much 0 luck. I’ve got mosquitto 2.0.14 downloaded and running. Here’s my configuration file: This generates the following log when I run mosquitto -c mosquitto_conf -v Here’s my html file, which I…
How to access a variable outside a subfunction in javascript
I have the following function that uses a GLTF loader to load a model into the scene (imported from another class): And I call that function from another class like this, wanting to push to the players array (meant to keep the players meshes) the gltf.scene mesh returned from the CreateMesh function. My probl…
mongodb – match if a group of values from an array is in another given array [with Aggregation]
I’m looking for a solution since 3 hours and I don’t get it yet. I have the following collection: and I would like to have only the documents that have all the index values in a given array like for example [1,2,4] using the example above, I would like to have the following output: [1,2] is in [1,…
Add generating headers method to route creating method [closed]
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 1 year ago. Improve this question I need an advice how to make my code better. I have a simple class tha…
JavaScript how to build array from nested Object using recursion without mutation
How to make this recursion without mutation, now I am mutating ids array. I want to follow functional programming principles Answer I’d avoid creating a lot of unnecessary intermediate arrays, but to each their own. Making this “immutable” is as easy as returning a new array from the getChil…
How can I use the prevState in a state with multiple arguments?
You see, at this moment I am developing a showMorePost that I had previously done successfully, but this time I reformulated it by joining all the states that I had in one with several arguments The problem is that now instead of bringing me the posts that follow when calling the handleShowMorePosts, it gener…
TypeError: Cannot read properties of undefined (reading ‘length’) – Would like an explanation of why the code is saying this
Task : to create a function that removes the outer element of an array if the inner array contains a certain number. i.e filteredArray([[10, 8, 3], [14, 6, 23], [3, 18, 6]], 18) should return [[10, 8, 3], [14, 6, 23]] I would like an explanation as to what exactly the code is doing/reading when causing this e…
Languages Statistic
I have to implement the “getLanguagesStatistic” function, which will help the IT magazine summarize 2019 in terms of the popularity of programming languages. As input, the function receives an array of user reviews. You need to return an object in the format {languageName: count, anotherLanguageNa…