This article will show you how to get unique values from arrays in javascript and nodejs.
We can get unique values in javascript using:
- Set
- Array.filter
Example with using Set:
const arrayOfStrings = [
'string1', 'string2', 'string1', 'string2', 'string3'
];
const uniqueStringsValues = [... new Set(arrayOfStrings)];
console.log(uniqueStringsValues);const arrayOfNumbers = [
10, 20, 30, 10, 20, 30, 44
];
const uniqueNumbersValues = [... new Set(arrayOfNumbers)];
console.log(uniqueNumbersValues);Example with using Array.filter:
const arrayOfStrings = [
'string1', 'string2', 'string1', 'string2', 'string3'
];
const uniqueStringValues = arrayOfStrings.filter((value, index, array) => array.indexOf(value) === index);
console.log(uniqueStringValues); const arrayOfNumbers = [
10, 20, 30, 10, 20, 30, 44
];
const uniqueNambersValues = arrayOfNumbers.filter((value, index, array) => array.indexOf(value) === index);
console.log(uniqueNambersValues);