leon's p.o. box detection regex

po_box_re.js

// leon's p.o. box detection regex
// for better results, trim and compress whitespace first

var pobox_re = /^box[^a-z]|(p[-. ]?o.?[- ]?|post office )b(.|ox)/i,
    arr = [
      "po box",
      "p.o.b.",
      "p.o. box",
      "po-box",
      "p.o.-box",
      "PO-Box",
      "p.o box",
      "pobox",
      "p-o-box",
      "p-o box",
      "post office box",
      "P.O. Box",
      "PO Box",
      "PO box",
      "box 122",
      "Box122",
      "Box-122",
    ];

for (var i in arr)
    console.log(pobox_re.test(arr[i]));