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Flutter ?? Usecase of Null-Aware Operator

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Avatar for ShangWeiTsai ShangWeiTsai
December 18, 2019
Programming
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Flutter ?? Usecase of Null-Aware Operator

An usecase of Null-Aware Operator

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ShangWeiTsai

December 18, 2019
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Transcript

  1. Flutter ?? Usecase of Null-Aware Operator Wayne Tsai

  2. What the Null-Aware Operator print(null ?? 'right'); print(true ?? 'right');

    print(false ?? 'right'); print('left' ?? 'right'); print(['left'] ?? 'right'); print({'left': true} ?? 'right'); print(['left'] ?? 'right'); right true false left [left] {left: true} [left]

  3. Cache Function

  4. Cache Function in Javascript

  5. Cache Function usage in js

  6. Cache Function in Dart - V1

  7. Cache Function in Dart - V2