I want to look in an array of objects if it contains a property and returns true if it found it, or false if it did not find it
An example of my array :
this.realEstateProjectMotivation.realEstateProjectOnSales[0] which is worth :
[
{
"id": 30,
"satisfied": false,
"onSaleSince":"1 day"
}
]
I would like to look in if realEstateProjectOnSales it contains onSaleSince and satisfied properties
how can I do it using Lodash or EcmaScript 2015 for example ?
You can use the in operator to check if a property exists in an object. You can loop the array with Array#some to find if at least one object contains the properties:
const arr = [
{
"id": 30,
"satisfied": false,
"onSaleSince":"1 day"
}
];
const containsProps = (item) => 'onSaleSince' in item && 'satisfied' in item;
const is0Contains = containsProps(arr[0]);
console.log('is0Contains: ', is0Contains);
const isArrayContains = arr.some(containsProps)
console.log('isArrayContains: ', isArrayContains);It easy to do with lodash#has method:
let hasProps = _.has(arr, '[0].satisfied') && _.has(arr, '[0].onSaleSince');
const arr = [
{
"id": 30,
"satisfied": false,
"onSaleSince":"1 day"
}
];
let hasProps = _.has(arr, '[0].satisfied') && _.has(arr, '[0].onSaleSince');
console.log(hasProps);<script src="https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>
var a = [{
id: 30,
satisfied: false,
onSaleSince: "1 day"
}, {
id: 30,
satisfied: false,
onSaleUntil: "1 day"
}];
console.log(
'Does every object in array has both `id` and `satisfied`?',
a.every(x => 'id' in x && 'satisfied' in x)
);
console.log(
'Is there any object in array which has both both `id` and `onSaleUntil`?',
a.some(x => 'id' in x && 'onSaleUntil' in x)
);
console.log(
'Does every object in array has at least one property of `onSaleSince` and `onSaleUntil`?',
a.every(x => 'onSaleSince' in x || 'onSaleUntil' in x)
);