Javascript: How can I use the filter() to filter out specific objects with a certain value?

Question

I have an object with accounts, example:

    {
      "amount": "822370.71",
      "state": "ME"
    },
    {
      "amount": "968817.53",
      "state": "FL"
    },
    {
      "amount": "587603.26",
      "state": "OH"
    },
    {
      "amount": "657617.83",
      "state": "OH"
    },
    {
      "amount": "657617.83",
      "state": "FL"
    }

Let's say I want to filter out only the objects with the states of "FL" and "OH", how could I use the filter() to do that? Thanks.

example here - https://www.w3schools.com/jsref/jsref_filter.asp — Charlesliam, Apr 02 '17 at 05:21

forJ · Accepted Answer · 2017-04-02T05:33:21.683

3

Try this

function filterArray (item) {
    if (item.state === "OH" || item.state === "FL"){
        return item;
    }
}

var resultArray = yourArray.filter(filterArray);
console.log(resultArray);

edited Apr 02 '17 at 05:33

answered Apr 02 '17 at 05:26

forJ

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1

`return item.state === "OH" || item.state === "FL";` would yield the same result. – Jordan Running Apr 02 '17 at 06:01
Yes it would yield same result – forJ Apr 02 '17 at 06:04

score 1 · Answer 2 · answered Apr 02 '17 at 05:29

Try this:

var array = [{
      "amount": "822370.71",
      "state": "ME"
    },
    {
      "amount": "968817.53",
      "state": "FL"
    },
    {
      "amount": "587603.26",
      "state": "OH"
    },
    {
      "amount": "657617.83",
      "state": "OH"
    },
    {
      "amount": "657617.83",
      "state": "FL"
    }];
    
    var filterArray = array.filter(function(item){
      return item.state === 'FL' || item.state === 'OH';
    });
    
    console.log(filterArray);

score 0 · Answer 3 · answered Apr 02 '17 at 05:34

use array.filter(callback) which takes a function with one argument and return the value that meets the condition you want :

var testArray = [ {
      "amount": "822370.71",
      "state": "ME"
    },
    {
      "amount": "968817.53",
      "state": "FL"
    },
    {
      "amount": "587603.26",
      "state": "OH"
    },
    {
      "amount": "657617.83",
      "state": "OH"
    },
    {
      "amount": "657617.83",
      "state": "FL"
    }];
  var filtered = testArray.filter(isStateFLorOH);

and the fucntion callback should be like this :

function isStateFLorOH(value){

if(value.state == "FL" || value.satate == "OH")
return value;
}

Javascript: How can I use the filter() to filter out specific objects with a certain value?

3 Answers3