Model Classes for Optional Chaining

swift Live Demo Short URL - http://tpcg.io/NsL74O

Program for Optional Chaining with '?'

swift Live Demo Short URL - http://tpcg.io/7a0pK5

Weak and Unowned References

swift Live Demo Short URL - http://tpcg.io/6mp89Y

Strong Reference Cycles for Closures

swift Live Demo Short URL - http://tpcg.io/JnpLeq

Unowned Reference Program

swift Live Demo Short URL - http://tpcg.io/nYJWCQ

Weak Reference Program

swift Live Demo Short URL - http://tpcg.io/pqtRco

ARC Strong Reference Cycles

swift Live Demo Short URL - http://tpcg.io/o29EmD

ARC Program

swift Live Demo Short URL - http://tpcg.io/i8lsK8

Required Initializers

swift Live Demo Short URL - http://tpcg.io/0cfrCT
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