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

For anyone confused by this in the future,

_.intersection.apply(_, arrayOfArrays)

Is in fact the most elegant way to do this. But:

var arrayOfArrays = [[43, 34343, 23232], [43, 314159, 343], [43, 243]];
arrayOfArrays = _.intersection.apply(_, arrayOfArrays);

Will not work! Must do

var differentVariableName = _.intersection.apply(_,arrayOfArrays);