learning-cc4e

Solution to https://cc4e.com/. If you copy these you're not right in the head.
git clone https://kaka.farm/~git/learning-cc4e
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output.txt (133B)

      1 Testing HashMap
      2 Object HashHashMap count=4 buckets=8
      3  y=2 [1]
      4  a=4 [1]
      5  z=1 [2]
      6  b=3 [2]
      7 size=4
      8 z=1
      9 x=42
     10 
     11 Iterate
     12  y=2
     13  a=4
     14  z=1
     15  b=3