This is code to only output the specified columns of the object. However, I am getting the output 4 times undefined.
const array1 = [{
name: 'k',
age: 5,
sex: 'f'
}, {
name: 'a',
age: 2,
sex: 'm'
}];
const result = function(col, arr) {
for (let obj of col.values()) {
for (let i = 0; i < arr.length; i++) {
console.log(arr[i].obj);
}
}
}
result(['name', 'age'], array1);You need to take the items of cols and change the accessor of arr.
const
array1 = [{ name: 'k', age: 5, sex: 'f' }, { name: 'a', age: 2, sex: 'm' }],
result = function(col, arr) {
for (const key of col) {
for (let i = 0; i < arr.length; i++) {
console.log(arr[i][key]);
}
}
};
result(['name', 'age'], array1);