Business
Jobs
  • About Us
  • Solutions
    • Job Postings
      Post your job and receive qualified candidates in 48h.
    • Candidate Assessments
      500+ technical and psychological tests, plus anti-fraud.
    • Headhunting
      Tailor-made executive search from start to finish.
    • Payroll + EOR
      Payroll dispersal and EOR across 15+ LATAM countries.
  • Pricing
  • Jobs

0

236
Views
React Typescript: Array does not map through all items

I have following Table / Array: enter image description here

If I press the blue button, then all items with the same group as the record should change the Status (Gratis). But now it just change the Value of the Record and all items above it. As an example, if I press the Button on Record No. 1 then itselft and all above (No. 0) get an change of the Status (Gratis).

Following code im using to go through the array and change the Status:

private _updateFreeStatus = (record: QuestionModel): void => {
        fetch('api/Test/UpdateGratisStatus', {
            headers: { 'Content-Type': 'application/json' },
            method: 'PUT',
            body: JSON.stringify({
                'group': record.group,
                'free': record.free,
            })
        });
        this.state.question.map(item => {
            if (item.group === record.group)
            {
                item.free = !record.free;
            }
        });
    }
about 4 years ago · Juan Pablo Isaza
1 answers
Answer question

0

  1. do not mutate the state
  2. create a copy, and use setState

Use

const updatedQuestions = this.state.question.map(item => {
  if (item.group === record.group) {
    return {
       ...item,
       free: !record.free
    }
  }
  return item;
});

this.setState({question: updatedQuestions});
about 4 years ago · Juan Pablo Isaza Report
Answer question
Find remote jobs

Discover the new way to find a job!

Top jobs
Top job categories
Business
Post vacancy Pricing Sales
Legal
Terms and conditions Privacy policy
© 2026 PeakU Inc. All Rights Reserved.
Andres GPT
Show me some job opportunities
There's an error!