fancyBarcode_regexp

function fancyBarcode(arr) {

    let barCodeNumber = Number(arr.shift());
    let regex = /([\@][\#]+)(?<code>[A-Z][a-zA-Z0-9]{4,}[A-Z])([\@][\#]+)/g
    let regNum = /[0-9]/g;
    let groupNum = ""


    for (let x = 0; x < barCodeNumber; x++) {
        let currBarcode = regex.exec(arr[x]);
        if (currBarcode != null) {
            let onlyBarCode = currBarcode.groups.code
            if (regNum.test(onlyBarCode)) {
                for (let i = 0; i < onlyBarCode.length; i++) {
                    let currLetter = onlyBarCode[i]
                    if (currLetter.charCodeAt(0) >= 48 && currLetter.charCodeAt(0) <= 57) {
                        groupNum += currLetter
                    }
                }
                console.log(`Product group: ${groupNum}`); continue
            }
            console.log("Product group: 00"); continue
        }
        console.log("Invalid barcode"); continue
    }
}

// fancyBarcode(["3",
//     "@#FreshFisH@#",
//     "@###Brea0D@###",
//     "@##Che4s6E@##"]);

//     console.log("___________________________________________");
fancyBarcode(["6",
    "@###Val1d1teM@###",
    "@#ValidIteM@#",
    "##InvaliDiteM##",
    "@InvalidIteM@",
    "@#Invalid_IteM@#",
    "@#ValiditeM@#"])