[javascript] remove item from array using its name / value

I have the following array

var countries = {};

countries.results = [
    {id:'AF',name:'Afghanistan'},
    {id:'AL',name:'Albania'},
    {id:'DZ',name:'Algeria'}
];

How can I remove an item from this array using its name or id ?

Thank you

You can delete by 1 or more properties:

//Delets an json object from array by given object properties. 
//Exp. someJasonCollection.deleteWhereMatches({ l: 1039, v: '3' }); -> 
//removes all items        with property l=1039 and property v='3'.
Array.prototype.deleteWhereMatches = function (matchObj) {
    var indexes = this.findIndexes(matchObj).sort(function (a, b) { return b > a; });
    var deleted = 0;
    for (var i = 0, count = indexes.length; i < count; i++) {
        this.splice(indexes[i], 1);
        deleted++;
    }
    return deleted;
}

Try this:

var COUNTRY_ID = 'AL';

countries.results = 
  countries.results.filter(function(el){ return el.id != COUNTRY_ID; });

You can do it with _.pullAllBy.

var countries = {};_x000D_
_x000D_
countries.results = [_x000D_
    {id:'AF',name:'Afghanistan'},_x000D_
    {id:'AL',name:'Albania'},_x000D_
    {id:'DZ',name:'Algeria'}_x000D_
];_x000D_
_x000D_
// Remove element by id_x000D_
_.pullAllBy(countries.results , [{ 'id': 'AL' }], 'id');_x000D_
_x000D_
// Remove element by name_x000D_
// _.pullAllBy(countries.results , [{ 'name': 'Albania' }], 'name');_x000D_
console.log(countries);

.as-console-wrapper {_x000D_
  max-height: 100% !important;_x000D_
  top: 0;_x000D_
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>_x000D_
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js"></script>

This that only requires javascript and appears a little more readable than other answers. (I assume when you write 'value' you mean 'id')

//your code
var countries = {};

countries.results = [
    {id:'AF',name:'Afghanistan'},
    {id:'AL',name:'Albania'},
    {id:'DZ',name:'Algeria'}
];
// solution:
//function to remove a value from the json array
function removeItem(obj, prop, val) {
    var c, found=false;
    for(c in obj) {
        if(obj[c][prop] == val) {
            found=true;
            break;
        }
    }
    if(found){
        delete obj[c];
    }
}
//example: call the 'remove' function to remove an item by id.
removeItem(countries.results,'id','AF');

//example2: call the 'remove' function to remove an item by name.
removeItem(countries.results,'name','Albania');

// print our result to console to check it works !
for(c in countries.results) {
    console.log(countries.results[c].id);
}

Try this.(IE8+)

//Define function
function removeJsonAttrs(json,attrs){
    return JSON.parse(JSON.stringify(json,function(k,v){
        return attrs.indexOf(k)!==-1 ? undefined: v;
}));}
//use object
var countries = {};
countries.results = [
    {id:'AF',name:'Afghanistan'},
    {id:'AL',name:'Albania'},
    {id:'DZ',name:'Algeria'}
];
countries = removeJsonAttrs(countries,["name"]);
//use array
var arr = [
    {id:'AF',name:'Afghanistan'},
    {id:'AL',name:'Albania'},
    {id:'DZ',name:'Algeria'}
];
arr = removeJsonAttrs(arr,["name"]);

it worked for me..

countries.results= $.grep(countries.results, function (e) { 
      if(e.id!= currentID) {
       return true; 
      }
     });

Maybe this is helpful, too.

for (var i = countries.length - 1; i--;) {
    if (countries[i]['id'] === 'AF' || countries[i]['name'] === 'Algeria'{
        countries.splice(i, 1);
    }
}

Created a handy function for this..

function findAndRemove(array, property, value) {
  array.forEach(function(result, index) {
    if(result[property] === value) {
      //Remove from array
      array.splice(index, 1);
    }    
  });
}

//Checks countries.result for an object with a property of 'id' whose value is 'AF'
//Then removes it ;p
findAndRemove(countries.results, 'id', 'AF');

you can use delete operator to delete property by it's name

delete objectExpression.property

or iterate through the object and find the value you need and delete it:

for(prop in Obj){
   if(Obj.hasOwnProperty(prop)){
      if(Obj[prop] === 'myValue'){
        delete Obj[prop];
      }
   }
}