javascript extract certain properties from all objects in array
map creates a new array, so there is no need to delete any thing, instead create an array of interesting keys and return it
var dummyArray = [{
"att1": "something",
"att2": "something",
"att20": "something",
"att100": "something"
}, {
"att1": "something",
"att2": "something",
"att20": "something",
"att100": "something"
}];
let x = dummyArray.map((item) => {
return {
attr20: item.att20
}
})
console.log(x)Use object destructuring to get the properties, and generate a new object using shorthand property names:
const dummyArray = [{ "att20": "att20", "att30": "att30", "att70": "att70", "att80": "att80"}, { "att20": "att20", "att30": "att30", "att70": "att70", "att80": "att80"}];
const result = dummyArray.map(({ att20, att30, att70, att80 }) => ({
att20,
att30,
att70,
att80
}));
console.log(result);