HarmonyOS Next原生应用开发-从TS到ArkTS的适配规则（十五）

let a: string[] = ['1.0', '2.0', '3.0'];
for (let i in a) {
  console.log(a[i]);
}

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let a: string[] = ['1.0', '2.0', '3.0'];
for (let i = 0; i < a.length; ++i) {
  console.log(a[i]);
}

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type OptionsFlags<Type> = {
  [Property in keyof Type]: boolean
}

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class C {
  n: number = 0
  s: string = ''
}

class CFlags {
  n: boolean = false
  s: boolean = false
}

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with (Math) { // 编译时错误, 但是仍能生成JavaScript代码
  let r: number = 42;
  let area: number = PI * r * r;
}

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let r: number = 42;
let area: number = Math.PI * r * r;

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throw 4;
throw '';
throw new Error();

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throw new Error();

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