How to rename field inside object - arrays

Question

I found some solutions but not exactly what I wanted. I want to change the field name inside the object name where condition I will explain by the following example for if
array=[{
"mobile1": [{
"screensize": "6.5"
}]
},
{
"mobile2": [{
"screensize": "6.5"
},
{
"price": "2000"
}
]
}
]
I want to change mobile1 to newmobile final output will be
[{
"newmobile": [{
"screensize": "6.5"
}]
},
{
"mobile2": [{
"screensize": "6.5"
},
{
"price": "2000"
}
]
}
]

Answer 1

Try this:
let c = [{
"mobile1": [{
"screensize": "6.5"
}]
},
{
"mobile2": [{
"screensize": "6.5"
},
{
"price": "2000"
}
]
}
]
let final = c.map(i=>{
let x = Object.getOwnPropertyNames(i)
if(x=="mobile1"){
console.log(i.mobile1)
return {"newmobile":i.mobile1}
}
else {
return i
}
})
console.log("final output",final);

Answer 2

With input.map(i => { const {x, ...rest} = i; return x ? {...rest, a: x} : rest}) you should be able to change const input = [{x: 1, y: 2}, {x: 11, y: 22}, {z: 111, y: 222}] into [{y:2,a:1},{y:22,a:11},{z:111,y:222}].
Could this work for you?
UPDATE
My solution takes advantage of JavaScript's destructuring assignment with spread operatr. You can find below a running snippet:
const input = [{x: 1, y: 2}, {x: 11, y: 22}, {z: 111, y: 222}]
const output = input.map(i => { const {x, ...rest} = i; return x ? {...rest, a: x} : rest})
console.log(output)
So, in your case, you have
const input = [{
"mobile1": [{
"screensize": "6.5"
}]
},
{
"mobile2": [{
"screensize": "6.5"
},
{
"price": "2000"
}
]
}
]
const output = input.map(i => { const {mobile1, ...rest} = i; return mobile1 ? {...rest, newmobile: mobile1} : rest})
console.log(output)
and the produced output is the one you need.
I hope this can help you to solve your problem.