I have JavaScript data that looks like this:

[
  ["firstName", "bob"],
  ["lastName", "smith"],
  ["address", "123 Main St]
]

The second values in each array (bob, smith, 123 main st) are entered from the user. I'm simply wanting to print the entered value. I know I can use indices (such as [0][1] to capture "bob") but is there a better way to do that? I know JavaScript objects have a .get() method where you can enter the key and have the value returned (such as .get("firstName") to return "bob"). Is there someway to do that with arrays?

Thanks!

CodePudding user response：

this way...
you may learn about Object.fromEntries()

const dataArr2 = 
  [ [ "firstName", "bob"]
  , [ "lastName", "smith"]
  , [ "address", "123 Main St"]
  ]
  
let obj = Object.fromEntries( dataArr2 )

console.log( obj.firstName ) // bob
console.log( obj.lastName )  // smith
console.log( obj.address )   // 123 Main St

CodePudding user response：

There are multiple ways to do so. Please check the below given examples.

const personArr = [
  ["firstName", "bob"],
  ["lastName", "smith"],
  ["address", "123 Main St"],
];

console.log(new Map(personArr));
console.log(Object.fromEntries(personArr));

function toObject(arr = []) {
  return arr.reduce((acc, [key, value]) => {
    acc[key] = value;
    return acc;
  }, {});
}
console.log(toObject(personArr));

const { firstName, lastName, address } = toObject(personArr);
console.log(firstName, lastName, address);