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remove duplicates from array of objects javascript

By Annoyed AlligatorAnnoyed Alligator on Sep 25, 2020 
arr.filter((v,i,a)=>a.findIndex(t=>(t.place === v.place && t.name===v.name))===i)

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remove duplicate objects based on id from array angular 8

By Enchanting EchidnaEnchanting Echidna on Nov 09, 2020 
function getUnique(arr, comp) {

                    // store the comparison  values in array
   const unique =  arr.map(e => e[comp])

                  // store the indexes of the unique objects
                  .map((e, i, final) => final.indexOf(e) === i && i)

                  // eliminate the false indexes & return unique objects
                 .filter((e) => arr[e]).map(e => arr[e]);

   return unique;
}

console.log(getUnique(arr,'id'));

Source: reactgo.com

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how to remove duplicate array object in javascript

By Restu Wahyu SaputraRestu Wahyu Saputra on Apr 22, 2020 
var arrayWithDuplicates = [
    {"type":"LICENSE", "licenseNum": "12345", state:"NV"},
    {"type":"LICENSE", "licenseNum": "A7846", state:"CA"},
    {"type":"LICENSE", "licenseNum": "12345", state:"OR"},
    {"type":"LICENSE", "licenseNum": "10849", state:"CA"},
    {"type":"LICENSE", "licenseNum": "B7037", state:"WA"},
    {"type":"LICENSE", "licenseNum": "12345", state:"NM"}
];

function removeDuplicates(originalArray, prop) {
     var newArray = [];
     var lookupObject  = {};

     for(var i in originalArray) {
        lookupObject[originalArray[i][prop]] = originalArray[i];
     }

     for(i in lookupObject) {
         newArray.push(lookupObject[i]);
     }
      return newArray;
 }

var uniqueArray = removeDuplicates(arrayWithDuplicates, "licenseNum");
console.log("uniqueArray is: " + JSON.stringify(uniqueArray));

Source: stackoverflow.com

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remove duplicate objects based on id from array angular 8

By Yeti WallhackYeti Wallhack on Jun 20, 2021 
this.item = this.item.filter((el, i, a) => i === a.indexOf(el))

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