What is the best way to remove duplicate values from an array?
var numbers = [1, 1, 5, 5, 4, 9];
I want my result to be:
var numbers = [4, 9];
Is there a method in lodash that can help me achieve this?
What is the best way to remove duplicate values from an array?
var numbers = [1, 1, 5, 5, 4, 9];
I want my result to be:
var numbers = [4, 9];
Is there a method in lodash that can help me achieve this?
To determine the index and last index of a specific value, you can refer to the following code snippet.
var items = [1, 1, 5, 5, 4, 9],
output = items.filter((item, index, arr) => arr.indexOf(item) === arr.lastIndexOf(item));
console.log(output);Here is a code snippet that demonstrates how to find unique elements in an array:
var list =[1,1,5,5,4,9];
let result = list.reduce((a, b) => {
a[b] = a[b] || 0;
a[b]++;
return a;
}, []).map((e, idx) => e==1? idx: undefined).filter(e => e);
console.log(result);To achieve unique values, consider utilizing the _.uniqBy() method.
_.uniqBy(dataList ,function(item){
return dataList.indexOf(item) === dataList.lastIndexOf(item)
})
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