Suppose I have this data:
var id = 81;
var categories = [1, 2, 3, 4, 5];
How do I transform this into:
[{id: 81, category: 1}, {id: 81, category: 2}, {id: 81, category: 3}, {id: 81, category: 4}, {id: 81, category: 5}]
Is there an elegant way to do this using underscore or lodash?
No need for libraries here.
const result = categories.map(x => ({ id, category: x }))
var id = 81;
var categories = [1, 2, 3, 4, 5];
var arr = [];
for (var i = 0; i < categories.length; i++) {
arr.push({id: id, category: categories[i]});
}
Or:
var a = categories.map(function(a) {
return {id: id, category: a};
});
You don't need any library, just good, old Vanilla JS.
var newArray = categories.map(function(item) {
return {id: id, cetegory: item}
});
Using Lo-Dash/Underscore, the code would be:
var result = _.map(categories, x => ({ id, category: x }));
But this is actually longer than the pure JS solution (from Роман Парадеев):
var result = categories.map(x => ({ id, category: x }));
