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Discussion on: React: Lifting state up is killing your app

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Replies for: hello, thanks for this wonderful tutorial can you tell me what's the difference in setCell function between : this.data = [ ...this.data.s...

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Andrey Goncharov Author •

Hi Bessem!

The second one mutates the array, while the first one creates a brand new one. See reactjs.org/docs/state-and-lifecyc...