How to create an array of objects that has two properties name and shade?

[{
    "name": "black",
    "shade": "dark"
  }, {
    "name": "white",
    "shade": "light"
  },
  {
    "name": "red",
    "shade": "dark"
  }, {
    "name": "blue",
    "shade": "dark"
  },
  {
    "name": "yellow",
    "shade": "light"
  }
]

How to create an array of objects that has two properties name and shade?

[{
    "name": "black",
    "shade": "dark"
  }, {
    "name": "white",
    "shade": "light"
  },
  {
    "name": "red",
    "shade": "dark"
  }, {
    "name": "blue",
    "shade": "dark"
  },
  {
    "name": "yellow",
    "shade": "light"
  }
]

I have two different arrays now.

name = ["black","white","red","blue","yellow"]
shade = ["dark","light","dark","dark","light"]

How can I achieve this?

• javascript
• arrays

• I was actually looking for the opposite of this .ie. I have an array of objects and want to split the 2 properties into 2 different arrays. Any idea please ? – Nikhil Nanjappa Commented Sep 6, 2019 at 9:52

4 Answers 4

Use map

var output = name.map( (s, i) => ({name : s, shade : shade[i]}) );

Demo

var name1 = ["black","white","red","blue","yellow"];

var shade = ["dark","light","dark","dark","light"];

var output = name1.map( (s, i) => ({name : s, shade : shade[i]}) );

console.log( output );

var new_array = [];
// assuming the arrays have the same length
for (var i = 0; i < name.length; i++)
    new_array.push({name: name[i], shade: shade[i]});

You can use .map():

let names = ["black", "white", "red", "blue", "yellow"],
    shades = ["dark", "light", "dark", "dark", "light"];

let merge = (a1, a2) => names.map((n, i) => ({name: n, shade: shades[i]}));

console.log(merge(names, shades));

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You could take a helper object for addressing the types.

var names = [ "black", "white", "red", "blue", "yellow"],
    shades = ["dark", "light", "dark", "dark", "light"],
    temp = { name: names, shade: shades },
    result = Object
        .keys(temp)
        .reduce(
            (r, k) => (temp[k].forEach((v, i) => (r[i] = r[i] || {})[k] = v), r),
            []
        );

console.log(result);

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