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in Technique[技术] by (71.8m points)

TypeScript不允许真假进行计算吗?

在 JavaScript 中可以

      true  -  true   //  0
      false -  false  //  0
      true  -  false  //  1
      false -  true   // -1

在 TypeScript 会是
image.png


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当然不可以拉,typescript是强类型的,boolean只能做比较不能做运算。js只可以boolean加减是因为隐性的把true转成了数字1,false转成0。在typescript里面需要 Number(true) - Number(true)才能运行成功。不然怎么叫强类型呢?


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