将数组添加到javascript中的对象数组

Question

I have two variables which is an array and array of object, I want to add the value of first variable(distance) to second variable(list)

The following works fine, but I want to know if there's any other method to get some result.

 let distance = [100,200,300] let list = [ {"city" : "paris"} , {"city" : "london"} , { "city" : "barcelona" }] for(let i = 0; i < distance.length;i++){ let listDistance = list.map(el => { return Object.assign({}, el, {distance:distance[i++]}) return el }); console.log(listDistance) } // output [ {city : paris , distance : 100 } , {city : london , distance : 200 } , { city : barcelona , distance : 300 }]

Answer 1

Try this:

 let array1 = [100, 200, 300] let array2 = [{ "city": "paris" }, { "city": "london" }, { "city": "barcelona" }] let res = array2.map((value, index) => { return { ...value, distance: array1[index] } }) console.log(res);

Answer 2

Like this?

 let distance = [100,200,300] let list = [ {"city" : "paris"} , {"city" : "london"} , { "city" : "barcelona" }] list.forEach((city,i) => city.distance = distance[i]) console.log(list)

Older browsers

 let distance = [100,200,300] let list = [ {"city" : "paris"} , {"city" : "london"} , { "city" : "barcelona" }] list.forEach(function(city,i) { city.distance = distance[i] }) console.log(list)

If you need a new Array you can use map:

 const distance = [100,200,300] let list = [ {"city" : "paris"} , {"city" : "london"} , { "city" : "barcelona" }] let distList = list.map((city,i) => ({ ...city, distance : distance[i]}) ) console.log(distList)

Answer 3

Try this

for(let i = 0; i < distance.length; i++)
{
   list[i].distance = distance[i];
}

Answer 4

const listWithDistances = list.map(
  (item, index) => ({ ...item, distance: distance[index] })
)

This has the same result of your example of returning a new Array of new Object s.