intersection - nodef/extra-entries GitHub Wiki
Obtain entries present in both entries.
Similar: union, intersection, difference, symmetricDifference, isDisjoint.
function intersection(x, y, fc)
// x: entries
// y: another entries
// fc: combine function (a, b)
const entries = require('extra-entries');
var x = ["a", 1], ["b", 2], ["c", 3], ["d", 4](/nodef/extra-entries/wiki/"a",-1],-["b",-2],-["c",-3],-["d",-4);
var y = ["b", 20], ["c", 30], ["e", 50](/nodef/extra-entries/wiki/"b",-20],-["c",-30],-["e",-50);
[...entries.intersection(x, y)];
// → [ [ "b", 2 ], [ "c", 3 ] ]
[...entries.intersection(x, y, (a, b) => b)];
// → [ [ "b", 20 ], [ "c", 30 ] ]