Looking to extract a specific value from an array of objects using array.map? Check out the code snippet below:
let balanceInfo = students.map((student) => {
if (typeof(student) === Object){
let balance = student.balance;
return balance;
}
})
console.log(balanceInfo)
For clarification:
students refers to an array of objects
.balance is the key within each object
This code snippet allows for easy retrieval of the balance information for each student in the array.
The issue lies with the code typeof(student) === Object, it should be written as "object" in lowercase within quotes.
let students = [
{
balance: 100,
},
{
balance: 200,
},
];
let balanceInfo = students.map((student) => {
if (typeof student === "object") {
let balance = student.balance;
return balance;
}
});
console.log(balanceInfo);While your implementation is mostly accurate, there is a minor issue with the way the typeof check is being performed. When using the typeof operator, it returns a string value. Therefore, the comparison should be made with the string 'object' instead of the Object constructor. Below is the revised code snippet:
let balanceInfo = students.map((student) => {
if (typeof student === 'object') {
let balance = student.balance;
return balance;
}
});
console.log(balanceInfo);
This revised code snippet will loop through the students array using the map method, extracting the balance property from each object. The resulting balanceInfo array will store all the balance values.
By using the .map() function, it seems that you are attempting to extract the balance information for all the students. If you only wish to display the balance values, you can achieve this by incorporating a console log within the iteration of the students array.
students.forEach((student) => {
console.log(student.balance)
})
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