fullstackopen | Exercises for the Full Stack Open course | GraphQL library

by villeheikkila JavaScript Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | fullstackopen Summary

fullstackopen is a JavaScript library typically used in Web Services, GraphQL, React, Nodejs, MongoDB, Express.js, Docker applications. fullstackopen has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Frontend for the patientor project in round 9 is hosted here.

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Security

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Support

fullstackopen has a low active ecosystem.

It has 377 star(s) with 42 fork(s). There are 7 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. There are 60 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of fullstackopen is current.

Quality

fullstackopen has 0 bugs and 0 code smells.

Security

fullstackopen has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

fullstackopen code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

fullstackopen does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

fullstackopen releases are not available. You will need to build from source code and install.

fullstackopen saves you 96 person hours of effort in developing the same functionality from scratch.

It has 246 lines of code, 0 functions and 154 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

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fullstackopen Key Features

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fullstackopen Examples and Code Snippets

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Community Discussions

Trending Discussions on fullstackopen

Catch block is not working as intended while trying to delete with an invalid ObjectId

React: mapping array of objects with nested arrays

How to give an individual item in an array its own unique state using React?

useState counter flickers after clicking the button

how to update the state before rendering the component?

react redux action not calling reducer

react useEffect hooks with axios cannot read property of undefined

Can React app handle error (status code 4xx) with try catch block

React state missing

How do I prevent the user from being able to add names that already exist?

QUESTION

Catch block is not working as intended while trying to delete with an invalid ObjectId

Asked 2021-Apr-04 at 11:30

The try block is working fine and I get the response as intended. However, when I try to delete with an invalid Object ID, the catch block does not work as intended. I should be getting a json response in Postman but I get nothing.

Here's the route handler:

...

ANSWER

Answered 2021-Apr-04 at 11:30

You also need to put the first promise into try catch

Source https://stackoverflow.com/questions/66940748

QUESTION

React: mapping array of objects with nested arrays

Asked 2021-Mar-26 at 19:57

I've sifted through a few questions answered already and learned quite a bit but I am stuck on a formatting issue.

With my components set up currently I am rendering this:

Half Stack application development

Node.js

List item
List item
List item
List item
List item

This is what I am attempting to render.

Half Stack application development

List item
List item
List item

Node.js

List item
List item

The data I am mapping

...

ANSWER

Answered 2021-Mar-26 at 19:57

You need to map through the courses and display the header inside the loop and then loop through the parts

Source https://stackoverflow.com/questions/66823375

QUESTION

How to give an individual item in an array its own unique state using React?

Asked 2021-Mar-18 at 13:14

I'm working through fullstackopen and i'm on exercise 1.13. I am struggling to understand how to implement a way to update the state for individual items in an array [anecdotes].

Each anecdote has is allowed a number of votes.

I can increment votes, but it increments votes for all.

https://fullstackopen.com/en/part1/a_more_complex_state_debugging_react_apps#exercises-1-6-1-14

The below code is what they provide as a hint to implement, as well as some hints about using arr.fill()

...

ANSWER

Answered 2021-Mar-18 at 13:04

Ok, so the issue is that you initialize the state(votes) with 0. Instead, you should initialize that with an array of zeros.

Source https://stackoverflow.com/questions/66691277

QUESTION

useState counter flickers after clicking the button

Asked 2020-Oct-30 at 03:10

export const App2 =()=>{
     const [counter,setCounter]=useState(0)
     setTimeout(()=>setCounter(counter+1),1000)

  
     return(
          {counter}
             {setCounter(counter+1)}}> Plus
         

     )



 }

...

ANSWER

Answered 2020-Oct-30 at 03:10

setTimeout causes an effect, so we should put it inside a useEffect() hook. Also, since setCounter depends on the previous counter state, we can pass an updater function to setCounter which receives the previous state value.

Source https://stackoverflow.com/questions/64600939

QUESTION

how to update the state before rendering the component?

Asked 2020-Oct-03 at 22:41

I have this app that adds "persons" to a "phonebook", and the user can update the person's phone if the person already exists. but I want to know to handle the problem of when the person was already deleted (i open two tabs and delete a phone in one tab, and I try to "update" it in the second tab)

I have a persons.js which handles all HTTP requests (I'm using axios) and a PersonNotification.js which tell the user if the phone is "added" or "updated" or "doesn't exist anymore" and all the main functionalities are inside the App.js

here is my code

persons.js

...

ANSWER

Answered 2020-Oct-03 at 20:29

This part should help you enough to go further.

persons.js

Source https://stackoverflow.com/questions/64185218

QUESTION

react redux action not calling reducer

Asked 2020-Jun-20 at 18:10

I cant for the life of my get one of my actions to call the reducer. I've written multiple other actions and reducers in this app, which works perfectly.

It is the beginning of a filter function. I have a text input field, where I constantly keep track of the input field state, and dispatch the field value to the redux action. I have a console.log inside the action, which logs every keypress properly.

What I cant seem to understand, is why the reducer isn't called at each keypress. I've tried multiple console.log's inside the reducer, however none of them gets logged with keypresses.

The first console.log inside the reducer is called when I refresh the page. if I try to log action.type instead, I get:

...

ANSWER

Answered 2020-Jun-20 at 18:06

Try to instantiate useDispatch like this after const [value, setValue] = useState("");

Source https://stackoverflow.com/questions/62489731

QUESTION

react useEffect hooks with axios cannot read property of undefined

Asked 2020-Jun-05 at 03:46

This is based on exercise 2.14 of this course https://fullstackopen.com/en/part2/getting_data_from_server.

The user can select a country, then the weather information for that country's capital will be dislpayed. My code gives me error Cannot read property 'temperature' of undefined

...

ANSWER

Answered 2020-Jun-05 at 03:39

weatherDetails is an empty array, initially, so there is no current property to read from.

Use some conditional rendering. Use initial null state and then check that it is truthy to access the rest of the object when it is updated.

Source https://stackoverflow.com/questions/62207658

QUESTION

Can React app handle error (status code 4xx) with try catch block

Asked 2020-May-03 at 18:58

I'm learning React (with hooks) and I encountered a weird issue. Im currently working on Notes Application (from FullStackOpen learn react). My database only accepts notes which content length is greater than 4 characters. In case of invalid note my server catches a ValidationError and returns an error message with status code 401 instead of new note. My goal is to catch this error in frontend and display an error message.

Backend code:

...

ANSWER

Answered 2020-May-03 at 17:42

Put the try, catch block around your api call:

Source https://stackoverflow.com/questions/61578806

QUESTION

React state missing

Asked 2020-Apr-19 at 22:01

I am working with React and I can't seem to define properly the state of a component (handlePoints). When I want to assign a new state using shallow copy it creates a new entry (key).

Apologies that part of the question is not in code. I couldn't edit it here. If you need more information please reach out. Thanks! I've added an image where you can see that there is a new entry added instead of a modification happening to an existing entry.

...

ANSWER

Answered 2020-Feb-17 at 00:00

In terms of why a new field with key 'selected' is being added, is due to how you are creating the new object. If you want to to update the key with the variable selected, you would need to modify the handlePoints function to be:

Source https://stackoverflow.com/questions/60252891

QUESTION

How do I prevent the user from being able to add names that already exist?

Asked 2020-Apr-17 at 08:52

The handleSubmit() function is where I am preventing the user from adding an existing user but it does not work. If the name added exists in the persons list then an alert should pop up.

EDIT: Link to my code https://github.com/yudhiesh1997/fullstackopen/tree/master/part2/phonebook

...

ANSWER

Answered 2020-Apr-17 at 08:30

You need to determine if your user exists in array

Source https://stackoverflow.com/questions/61267163

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