moctarjallo :
I need to make a function getPropertiesData(list) that takes a list of properties and an object containing those properties and only return properties of the object that match in the list.
Illustration:
function getPropertiesData(['x', 'y']){
const o = {
'x': 1,
'y': 2,
'z': 3
}
// Will return
return {
'x': 1,
'y': 2
}
// not including the 'z' variable since it was not specified as input in the list array
}
How to do that in javascript ?
palaѕн :
You can use Object.assign() method for this requirement like:
function getPropertiesData(arr) {
const o = { 'x': 1, 'y': 2, 'z': 3 }
return Object.assign({}, ...arr.map(a => ({[a]: o[a]})));
}
console.log(getPropertiesData(['x', 'y']))In case you need to get values for only the keys which exists in the object o, you can use this:
function getPropertiesData(arr) {
const o = { 'x': 1, 'y': 2, 'z': 3 }
return Object.assign({}, ...arr.map(a => o.hasOwnProperty(a) ? ({[a]: o[a]}) : null));
}
console.log(getPropertiesData(['x', 'y']))
console.log(getPropertiesData(['w', 'x']))Guess you like
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