JSFiddle - React, Tailwind, and code Playground

JavaScript

var rundhalsArray = ["50237451_001", "50237451_100"];
var arr = ["50237451_001", "50237451_100", "50236765_001", "50236765_100"];

var result = [];
$.map(rundhalsArray, function (val, i) {
    if ($.inArray(val, arr) > -1) {
        result.push(val);
    }
});

console.log(result);