Consider the following arrays:
const a1=[
{
a:{ name: "first" }
},
{
b:{ name: "second" }
},
{
c:{ name: "third" }
},
{
d:{ name: "fourth" }
}
]
const a2=[
{
a:{ name: "first", shelf: "read" }
},
{
b:{ name: "second", shelf: "current" }
}
]
The task at hand is to compare the content of a1 with that of a2, and if any matches are found, update those items in a1 by adding the missing 'shelf' property.
The expected result should be:
[
{
a:{ name: "first", shelf: "read" }
},
{
b:{ name: "second", shelf: "current" }
}
{
c:{ name: "third" }
},
{
d:{ name: "fourth" }
}
]
An attempted solution involved using map for both arrays and checking for matching names, but due to not having access to the inner map's return value, the original array was returned. A proposed alternative could be concatenating the arrays and utilizing JavaScript's reduce method to check and update the shelf property accordingly. Any suggestions on a more effective approach would be greatly appreciated.