JSFiddle - React, Tailwind, and code Playground

JavaScript

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

$.each(rundhalsArray, function(k,v){
    $.each(_Array, function(k2,v2){
        if(v===v2) _Array.splice(k2,1);
    });
});

console.log(_Array);