使数组中的数组成为对象

Question

Best way to convert

a = [['tokyo', '10', '20'],['newyork', '30', '40'],['singapore', '50', '60']];

to

a = [{city:'tokyo', lat:'10', lon:'20'},{city:'newyork', lat:'30', lon:'40'},{city:'singapore', lat:'50', lon:'60'}];

Thanks!

Answer 1

You can use #map() function to convert it into the array of objects - see demo below:

 var a = [['tokyo', '10', '20'],['newyork', '30', '40'],['singapore', '50', '60']]; var result = a.map(function(e) { return { city: e[0], lat: e[1], lon: e[2] } },[]); console.log(result); 

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Answer 2

Not sure about best way, but I think it's readable. It uses a method called .map() that goes through each element in an array, and typically modifies it to your liking. See the below code for an example.

a = [['tokyo', '10', '20'],['newyork', '30', '40'],['singapore', '50', 
'60']];

const newArrayOfObjects = a.map(val => {
  return { city: val[0], lat: val[1], lon: val[2] }
})

newArrayOfObjects

MDN reference here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map