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new Map() collection in react state

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putsan answered on December 25, 2020 Popularity 10/10 Helpfulness 4/10

answer new Map() collection in react state

related react array.map with return

related Use of map in react

related how to map array in react

new Map() collection in react state

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function MapComponent(){
  const [myMap, setMyMap] = useState(new Map());
  const updateMap = (k,v) => {
    setMyMap(new Map(myMap.set(k,v)));
  }
  return(
    <ul>
      {[...myMap.keys()].map(k => (
        <li key={k}>myMap.get(k)</li>
      ))}
    </ul>
  );
}

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: medium.com

Tags: javascript react-state

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Contributed on Dec 25 2020

putsan

0 Answers Avg Quality 2/10

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react array.map with return

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const robots = ['Bruce', 'Clark', 'Diana']

robots.map((robot, index) => {
                    return (
                        <h1 key={index}>{robot} </h1>
                    )
})

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jun 02 2022

Brainless

0 Answers Avg Quality 2/10

Use of map in react

Comment

const todoItems = [
  {
    id: 1,
    text:"todo 1"
  },
  {
    id: 2,
    text:"todo 3"
  },
  {
    id: 3,
    text:"todo 3"
  }
];
const todoItems = todos.map((todo) =>
  <li key={todo.id}>
    {todo.text}
  </li>
);

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: reactjs.org

Tags: javascript j

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Contributed on May 18 2022

serge kalaga

0 Answers Avg Quality 2/10

how to map array in react

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export const Articles = props => {
  const [articles, setArticle] = React.useState(props.data || [])
  React.useEffect(() => {
    if (Array.isArray(articles) && articles.length < 1) {
      setArticle([
        {
          title: 'how to map array in react',
          content: `read this code!`,
        },
      ])
    }
  }, [articles])
  return (
    <div>
      {Array.isArray(articles) &&
        articles.map((item, key) => (
          <article key={key}>
            <h2>{item.title}</h2>
            <p>{item.content}</p>
          </article>
        ))}
    </div>
  )
}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: github.com

Tags: javascript j

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Contributed on Sep 12 2022

Zeta Ramadhan

0 Answers Avg Quality 2/10

new Map() collection in react state

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new Map() collection in react state

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