Filter expression on arrays

Hi @AleksandarAngelevski, thank you very much. that helped.

I am actually looking for docnames that doesn’t exist in filename array. so I removed ! from your expression;

$docname.filter((x,ind,arr) => $filename.indexOf(x) == -1)
$docid.filter((x,ind) => $filename.indexOf($docname[ind]) == -1)
$docext.filter((x,ind) => $filename.indexOf($docname[ind]) == -1)

but looks like my data is coming bit differently, the docname are coming with characters, how can I compare with out converting to string to replace these characters?

[
  {
    "filename": [
      "Coupa_Supplier_SB_Tax_Cert_PO_4501923290",
      "Coupa_Supplier_SB_Tax_Cert_PO_4501888888"
    ],
    "id": 16755,
    "docid": [
      "FOL18          4 EXT48000000000761",
      "FOL18          4 EXT48000000000760",
      "FOL18          4 EXT48000000000759"
    ],
    "docname": [
      "Coupa_Supplier /SB_Tax_Cert PO #4501999999",
      "Coupa_Supplier_SB_Tax_Cert_PO 4501923290",
      "Coupa_Supplier_SB_Tax_Cert_PO_4501888888"
    ],
    "docext": [
      "pdf",
      "pdf",
      "pdf"
    ]
  }
]

Also looks like my destination system accepts only _ so after match, need to replace spaces, #, / to _.

Thanks
Manohar