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nullren/a.rb

Created November 20, 2015 00:51
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  1. renning bruns created this gist Nov 20, 2015.
    14 changes: 14 additions & 0 deletions a.rb
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,14 @@

    // Lazily initialized, cached hashCode
    private volatile int hashCode = 0; // (See Item 48)

    public int hashCode() {
    if (hashCode == 0) {
    int result = 17;
    result = 37*result + areaCode;
    result = 37*result + exchange;
    result = 37*result + extension;
    hashCode = result;
    }
    return hashCode;
    }