How to calculate intersection of multiple arrays in JavaScript? And what does [equals: function] mean?

Question

I am aware of this question, simplest code for array intersection but all the solutions presume the number of arrays is two, which cannot be certain in my case.

I ha

Answer 1

Your code with _lodash is working fine.

As you can say in this fiddle:

this code:

var arrayOfArrays = [[4234, 2323, 43], [1323, 43, 1313], [23, 34, 43]];
var a = _.intersection.apply(_, arrayOfArrays);
console.log(a);
console.log(a.length);

Will have output:

[42]
1

Maybe you see

equals: function

because you are using kind of debugger.

Try to just print the array with console.log, you will get only 42.