#24 trtong - finall fixed the nullpointerexception

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trtong wants to merge 4 commits from trtong/Lab-ZipcoderStore-HashMap:master into master

4 Commits

Author SHA1 Message Date
  Trinh Tong c3f946382f Finished 6 years ago
  Trinh Tong 52a7e9eee8 Linked Map 6 years ago
  Trinh Tong fa3bb796ee Linked Map 6 years ago
  Trinh Tong 417abc92b1 starting lab 6 years ago