Remove duplicates of array from another array, JavaScript

Question

How can i remove duplicated arrays in this data structure?

[![enter image description here][1]][1]

I got this:

 ["5", "26", 300],
 ["7", "10", 20],
 ["3", "4", 30],
 ["5", "2", 52],
 ["9", "5", 300],
 ["3", "4", 30],
 ["5", "2", 52],
 ["5", "26", 300],
 ["1", "27", 250]

with:

var all = [].concat(jsonData['l'],jsonData['c'], jsonData['r']); 
for (e in all){
 console.log([all[e].source, all[e].target, Number(all[e].link)]);
}

I need to reduce data, remove duplicated arrays and provide result to sankey graf. jsonData elements contain much more data and structure of each left, center and right side is a little bit diffrent. [1]: https://i.sstatic.net/1MvXz.png

• Nina Scholz: please add the array as text and add you code
• Felix Kling: What specifically are you having problems with? The general approach is pretty simple: iterate over the array and only add the values to the output array which you haven't seen yet.

Answer 1

You could filter them:

var a = [[1, 2, 3], [1, 2, 3], [4, 5, 6], [4, 5, 6], ['foo']];
var tmp = [];
var b = a.filter(function (v) {
 if (tmp.indexOf(v.toString()) < 0) {
 tmp.push(v.toString());
 return v;
 }
});
console.log(b);

Answer 2

In this other reply it was resolved stringifying the arrays, and removing duplicates with a Set. It should be much simpler

Array.from(new Set(jsonData.map(JSON.stringify)), JSON.parse)