I have an array of objects:
let cars = [
{
"color_1": "purple",
"color_2": "red",
"type": "minivan",
"capacity": 7,
"all_colors": []
},
{
"color_1": "blue",
"color_2": "orange",
"type": "station wagon",
"capacity": 5,
"all_colors": []
}
]
I want to filter all keys (startsWith) "color..." and merge them into "all_colors" like this:
let cars = [
{
"color_1": "purple",
"color_2": "red",
"type": "minivan",
"capacity": 7,
"all_colors": ['purple', 'red']
},
{...}
]
I tried this:
var res = Object.keys(Object.assign({}, ...cars)).filter(v => v.startsWith('color'));
console.log(res)
but i need it for all objects and i don't know how to add the results into "all_colors"?
You can do it like this:
let cars = [
{ "color_1": "purple", "color_2": "red", "type": "minivan" ,"capacity": 7, "all_colors": [] },
{ "color_1": "blue", "color_2": "orange", "type": "station wagon","capacity": 5, "all_colors": [] }
];
for (const car of cars) {
const color_properties = Object.keys(car).filter((key) => key.startsWith('color'));
car.all_colors = color_properties.map((color) => car[color]);
}
console.log(cars);You could get entries, filter and map the values.
const
cars = [{ color_1: "purple", color_2: "red", type: "minivan", capacity: 7, all_colors: [] }, { color_1: "blue", color_2: "orange", type: "station wagon", capacity: 5, all_colors: [] }],
result = cars.map(o => ({ ...o, all_colors: Object
.entries(o)
.filter(([k]) => k.startsWith('color'))
.map(([, v]) => v)
}));
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }