remove duplicate entries from javascript array code example
Example 1: javascript to remove duplicates from an array
uniqueArray = a.filter(function(item, pos) {
return a.indexOf(item) == pos;
})
Example 2: javascript remove duplicate strings from array
let uniqueArray = [...new Set(arrayWithDuplicates)];
function removeArrayDuplicates(arrayWithDuplicates) {
let seen = {};
let uniqueArray = [];
let len = arrayWithDuplicates.length;
let j = 0;
for(let i = 0; i < len; i++) {
let item = arrayWithDuplicates[i];
if(seen[item] !== 1) {
seen[item] = 1;
uniqueArray[j++] = item;
}
}
return uniqueArray;
}