Skip to main content

How to add data in array in form state in React

Problem Screenshot

I am trying to use the form to add data to the form data I want the question to go into question as shown in the form data then I want the options to go into the options array as `

{ letter: "A", answer: "", isTrue: false },
      { letter: "B", answer: "", isTrue: false },
      { letter: "C", answer: "", isTrue: false },
      { letter: "D", answer: "", isTrue: false },

` but I am finding difficult The questions can be added and dynamically and changing just the questions works individually but I can't get to do the same for the options Please help me achieve this, even if it can be done in another totally different way

  const [questionId, setQuestionId] = useState(0);
  const [questions, setQuestions] = useState({});

  const [form, setForm] = useState([]);
  const [opt, setOpt] = useState([]);

  const opts = ["A", "B", "C", "D"];

  const handleAddData = (e) => {
    e.preventDefault();
    const inputState = {
      question: "",
      options: [],
    };
    setForm((prev) => [...prev, inputState]);
  };

  const addOpt = () => {
    const initialState = {
      letter: "",
      answer: "",
      isTrue: false,
    };

    setOpt((prev) => [...prev, initialState]);
    opt.filter((item) => item.letter !== "");
    console.log(opt.filter((item) => item.letter !== ""));
  };

  const handleRemove = (index, e) => {
    e.preventDefault();

    setForm((prev) => prev.filter((item) => item !== prev[index]));
  };

  const onChange = (index, e) => {
    e.preventDefault();
    e.persist();

    setForm((prev) => {
      return prev.map((item, i) => {
        if (i !== index) return item;
        console.log(item);
        item.options.map((op, ind) => {
          console.log(`${op}: ${ind}`);
        });
        return {
          ...item,
          [e.target.name]: e.target.value,
          options: opt.filter((item) => item.letter !== ""),
        };
      });
    });
  };
  const onOptChange = (e, index) => {
    e.preventDefault();
    e.persist();
    let opt = e.target.placeholder.slice(-1);
    console.log(opt);

    let options = [
      { letter: "A", answer: "", isTrue: false },
      { letter: "B", answer: "", isTrue: false },
      { letter: "C", answer: "", isTrue: false },
      { letter: "D", answer: "", isTrue: false },
    ];
  };

  return (
    <Container>
      <Segment>
        <Item.Group>
          <Item>
            <Item.Content>
              <Form>
                {JSON.stringify(form)}
                {form.map((item, index) => (
                  <>
                    <Card.Group key={index}>
                      <Card fluid color="red" className="p1">
                        <Form.TextArea
                          label="Question"
                          placeholder="Enter Question"
                          name="question"
                          value={item.question}
                          onChange={(e) => onChange(index, e)}
                        />
                        <Form.Group widths="equal">
                          <Form.Field>
                            <Input
                              label="Option A"
                              placeholder="Enter Option A"
                              key={index}
                              fluid
                              name="answer"
                              onChange={(e) => onOptChange(e)}
                            />
                          </Form.Field>
                          <Form.Field>
                            <Input
                              label="Option B"
                              placeholder="Enter Option B"
                              key={index}
                              fluid
                              name="answer"
                              onChange={(e) => onOptChange(e)}
                            />
                          </Form.Field>
                        </Form.Group>

                        <Form.Group widths="equal">
                          <Form.Field>
                            <Input
                              label="Option C"
                              placeholder="Enter Option C"
                              key={index}
                              fluid
                              name="answer"
                              onChange={(e) => onOptChange(e)}
                            />
                          </Form.Field>
                          <Form.Field>
                            <Input
                              label="Option D"
                              placeholder="Enter Option D"
                              key={index}
                              fluid
                              name="answer"
                              onChange={(e) => onOptChange(e)}
                            />
                          </Form.Field>
                        </Form.Group>
                        <Form.Field>
                          <Input
                            label="Correct Answer"
                            placeholder="Enter Correct Answer"
                            fluid
                            name="correct_answer"
                          />
                        </Form.Field>
                      </Card>
                    </Card.Group>
                    <Button
                      // primary
                      size="small"
                      icon="minus"
                      labelPosition="right"
                      content="Remove"
                      className="mt-2"
                      color="red"
                      onClick={(e) => handleRemove(index, e)}
                      // disabled={!allFieldsSelected || processing}
                    />
                    <Divider />
                  </>
                ))}
                <Button
                  primary
                  size="small"
                  icon="plus"
                  labelPosition="right"
                  content="Add"
                  className="mt-2"
                  onClick={handleAddData}
                />
              </Form>
            </Item.Content>
          </Item>
        </Item.Group>
      </Segment>
      <br />
    </Container>

I tried using this onOptChange below to change the options array individually but couldn't get a good result

const onOptChange = (e, index) => {
    e.preventDefault();
    e.persist();
    let opt = e.target.placeholder.slice(-1);
    console.log(opt);

    let options = [
      { letter: "A", answer: "", isTrue: false },
      { letter: "B", answer: "", isTrue: false },
      { letter: "C", answer: "", isTrue: false },
      { letter: "D", answer: "", isTrue: false },
    ];
  };
Via Active questions tagged javascript - Stack Overflow https://ift.tt/iKLH3bx

Comments

Popular posts from this blog

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype

How to split a rinex file if I need 24 hours data

Trying to divide rinex file using the command gfzrnx but getting this error. While doing that getting this error msg 'gfzrnx' is not recognized as an internal or external command Trying to split rinex file using the command gfzrnx. also install'gfzrnx'. my doubt is I need to run this program in 'gfzrnx' or in 'cmdprompt'. I am expecting a rinex file with 24 hrs or 1 day data.I Have 48 hrs data in RINEX format. Please help me to solve this issue. source https://stackoverflow.com/questions/75385367/how-to-split-a-rinex-file-if-i-need-24-hours-data

ValueError: X has 10 features, but LinearRegression is expecting 1 features as input

So, I am trying to predict the model but its throwing error like it has 10 features but it expacts only 1. So I am confused can anyone help me with it? more importantly its not working for me when my friend runs it. It works perfectly fine dose anyone know the reason about it? cv = KFold(n_splits = 10) all_loss = [] for i in range(9): # 1st for loop over polynomial orders poly_order = i X_train = make_polynomial(x, poly_order) loss_at_order = [] # initiate a set to collect loss for CV for train_index, test_index in cv.split(X_train): print('TRAIN:', train_index, 'TEST:', test_index) X_train_cv, X_test_cv = X_train[train_index], X_test[test_index] t_train_cv, t_test_cv = t[train_index], t[test_index] reg.fit(X_train_cv, t_train_cv) loss_at_order.append(np.mean((t_test_cv - reg.predict(X_test_cv))**2)) # collect loss at fold all_loss.append(np.mean(loss_at_order)) # collect loss at order plt.plot(np.log(al...