printing out items from an array within an array of objects

Question

I am trying to create some pills for a card display. I have an array of objects which I am mapping over to produce them on the page. Within the objects I have an array called tech which has something like tech: ['python', 'react.js'] etc.

something like this:

    const data = [
        {
          imgUrl: "https://images.unsplash.com/photo-1551882547-ff40c63fe5fa?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80",
          description: 'oifonefpempfewpvpewmpew',
          title: "Some project name",
          tech: ["python", "react.js"],
        },
{
          imgUrl: "https://images.unsplash.com/photo-1551882547-ff40c63fe5fa?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1350&q=80",
          description: 'oifonefpempfewpvpewmpew',
          title: "Some project name",
          tech: ["python", "react.js"],
        },
    ]

I have mapped over that array like so.

<div className="">
  {data.map(tech => (
    <span className="inline-block bg-gray-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2">
      {tech.tech}
    </span>
  ))}
</div>

Which it prints out the items, but it doesnt split them up into seperate pills just prints the array in one pill.

I am using Gatsby for my project

How can i split them up?

data.tech is the array you want to map over, but it doesn't seem to be an array of objects — Anurag Srivastava
– Anurag Srivastava, Commented Jul 6, 2020 at 16:07
Are you sure you have posted the data correctly? There's no rating field at any level — Anurag Srivastava
– Anurag Srivastava, Commented Jul 6, 2020 at 16:13

Anurag Srivastava · Accepted Answer · 2020-07-06 16:16:49Z

1

You need to have another .map();

<div className="">
  {data.map(el => (
    el.tech.map(currTech => (
      <span className="inline-block bg-gray-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2">
        {currTech}
      </span>
    ))        
  ))}
</div>

answered Jul 6, 2020 at 16:16

Anurag Srivastava

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2 Comments

mrpbennett Over a year ago

lovely...thanks for this. I was on the right lines before i got came here :)

Anurag Srivastava Over a year ago

Always remember, no of loops = no of arrays

Dev Yego · Accepted Answer · 2020-07-06 16:19:35Z

0

From your code, you can see that you're just outputting the array at {tech.tech}: Try this, assuming you already created the component as Pill and data hold the array of project objects; I am also assuming this is a project component and the Pill component lives in it, then:

<div className="">
    {data.map(project => (
        <span className="inline-block bg-gray-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2">
            {project.tech.map(t => <Pill tech={t} />)}
        </span>
    ))}
</div>

answered Jul 6, 2020 at 16:19

Dev Yego

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