Javascript - how to filter out entries of set

Amrmsmb
November 28, 2023
117 views
1 vote
2 Answers

for the following contents of data object:

0
: 
{pppId: '005618-00', eppo: 'FAUSY', crop: 'Rotbuche'}
1
: 
{pppId: '005618-00', eppo: 'PSTME', crop: 'Douglasie'}
2
: 
{pppId: '005618-00', eppo: 'QUESS', crop: 'Eiche'}
3
: 
{pppId: '005618-00', eppo: 'YLAGL', crop: 'Langholzpolter'}
4
: 
{pppId: '005618-00', eppo: 'PIEPU', crop: 'Blaufichte'}
5
: 
{pppId: '005618-00', eppo: 'ALUSS', crop: 'Erle'}
6
: 
{pppId: '005618-00', eppo: 'POPSS', crop: 'Pappel'}
7
: 
{pppId: '005618-00', eppo: 'YLAGE', crop: 'Einzelstämme'}
8
: 
{pppId: '005618-00', eppo: 'NNNZG', crop: 'Ziergehölze'}
9
: 
{pppId: '005618-00', eppo: 'ACRCA', crop: 'Acer campestre'}
10
: 
{pppId: '005618-00', eppo: 'YLAGS', crop: 'Schichtholzpolter'}
11
: 
{pppId: '005618-00', eppo: 'PIUSS', crop: 'Kiefer'}
12
: 
{pppId: '005618-00', eppo: 'ABINO', crop: 'Nordmann-Tanne'}
13
: 
{pppId: '005618-00', eppo: 'CIPBE', crop: 'Carpinus betulus'}
14
: 
{pppId: '005618-00', eppo: 'LAXSS', crop: 'Lärche'}

i want to filter out the contents of the object data by the crop name Eiche and Kiefer
i want to make data contains only the 2nd and the 11th entries. in other words, i want data to contain:

{pppId: '005618-00', eppo: 'QUESS', crop: 'Eiche'}
{pppId: '005618-00', eppo: 'PIUSS', crop: 'Kiefer'}

how can i achieve that please

Tags: angular javascript

Answers

You can try the following way:

const data = {
  '0': { pppId: '005618-00', eppo: 'FAUSY', crop: 'Rotbuche' },
  '1': { pppId: '005618-00', eppo: 'PSTME', crop: 'Douglasie' },
  '2': { pppId: '005618-00', eppo: 'QUESS', crop: 'Eiche' },
  '3': { pppId: '005618-00', eppo: 'YLAGL', crop: 'Langholzpolter' },
  '4': { pppId: '005618-00', eppo: 'PIEPU', crop: 'Blaufichte' },
  '5': { pppId: '005618-00', eppo: 'ALUSS', crop: 'Erle' },
  '6': { pppId: '005618-00', eppo: 'POPSS', crop: 'Pappel' },
  '7': { pppId: '005618-00', eppo: 'YLAGE', crop: 'Einzelstämme' },
  '8': { pppId: '005618-00', eppo: 'NNNZG', crop: 'Ziergehölze' },
  '9': { pppId: '005618-00', eppo: 'ACRCA', crop: 'Acer campestre' },
  '10': { pppId: '005618-00', eppo: 'YLAGS', crop: 'Schichtholzpolter' },
  '11': { pppId: '005618-00', eppo: 'PIUSS', crop: 'Kiefer' },
  '12': { pppId: '005618-00', eppo: 'ABINO', crop: 'Nordmann-Tanne' },
  '13': { pppId: '005618-00', eppo: 'CIPBE', crop: 'Carpinus betulus' },
  '14': { pppId: '005618-00', eppo: 'LAXSS', crop: 'Lärche' },
};

//convert object to array
const dataArray = Object.values(data);

//filter the array based on 'crop' property
const filteredArray = dataArray.filter(entry => entry.crop === 'Eiche' || entry.crop === 'Kiefer');

//if you want the result back as an object
const filteredData = Object.fromEntries(filteredArray.map((entry, index) => [index.toString(), entry]));

console.log(filteredData);

Use Set to filter the needed crops:

const data = [
  { pppId: '005618-00', eppo: 'FAUSY', crop: 'Rotbuche' },
   { pppId: '005618-00', eppo: 'PSTME', crop: 'Douglasie' },
   { pppId: '005618-00', eppo: 'QUESS', crop: 'Eiche' },
   { pppId: '005618-00', eppo: 'YLAGL', crop: 'Langholzpolter' },
   { pppId: '005618-00', eppo: 'PIEPU', crop: 'Blaufichte' },
   { pppId: '005618-00', eppo: 'ALUSS', crop: 'Erle' },
   { pppId: '005618-00', eppo: 'POPSS', crop: 'Pappel' },
   { pppId: '005618-00', eppo: 'YLAGE', crop: 'Einzelstämme' },
   { pppId: '005618-00', eppo: 'NNNZG', crop: 'Ziergehölze' },
   { pppId: '005618-00', eppo: 'ACRCA', crop: 'Acer campestre' },
   { pppId: '005618-00', eppo: 'YLAGS', crop: 'Schichtholzpolter' },
   { pppId: '005618-00', eppo: 'PIUSS', crop: 'Kiefer' },
   { pppId: '005618-00', eppo: 'ABINO', crop: 'Nordmann-Tanne' },
   { pppId: '005618-00', eppo: 'CIPBE', crop: 'Carpinus betulus' },
   { pppId: '005618-00', eppo: 'LAXSS', crop: 'Lärche' },
];

const filter = new Set( ['Eiche' , 'Kiefer']);
const filteredArray = data.filter(({crop}) => filter.has(crop));


console.log(filteredArray);

An one-liner:

const data = [
  { pppId: '005618-00', eppo: 'FAUSY', crop: 'Rotbuche' },
   { pppId: '005618-00', eppo: 'PSTME', crop: 'Douglasie' },
   { pppId: '005618-00', eppo: 'QUESS', crop: 'Eiche' },
   { pppId: '005618-00', eppo: 'YLAGL', crop: 'Langholzpolter' },
   { pppId: '005618-00', eppo: 'PIEPU', crop: 'Blaufichte' },
   { pppId: '005618-00', eppo: 'ALUSS', crop: 'Erle' },
   { pppId: '005618-00', eppo: 'POPSS', crop: 'Pappel' },
   { pppId: '005618-00', eppo: 'YLAGE', crop: 'Einzelstämme' },
   { pppId: '005618-00', eppo: 'NNNZG', crop: 'Ziergehölze' },
   { pppId: '005618-00', eppo: 'ACRCA', crop: 'Acer campestre' },
   { pppId: '005618-00', eppo: 'YLAGS', crop: 'Schichtholzpolter' },
   { pppId: '005618-00', eppo: 'PIUSS', crop: 'Kiefer' },
   { pppId: '005618-00', eppo: 'ABINO', crop: 'Nordmann-Tanne' },
   { pppId: '005618-00', eppo: 'CIPBE', crop: 'Carpinus betulus' },
   { pppId: '005618-00', eppo: 'LAXSS', crop: 'Lärche' },
];

const filteredArray = data.reduce((r, item) => (r.set.has(item.crop) && r.arr.push(item), r), {set: new Set( ['Eiche' , 'Kiefer']), arr:[]}).arr;


console.log(filteredArray);

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Javascript – how to filter out entries of set

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