c0a2882b_m__Writing_Efficient_Programs___Type
[Operator] + [Result can only be...] longer [Type] 
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b o o l e a n
p o s i t i v e n u m b e r s
S t r i n g
c o l l e c t i o n
XPlorations - Refactorings from 'Writing Efficient Programs'
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