数组的map函数, 如何返回interface？

interface Student { 
  name: string 
} 
 
@Entry 
@Component 
struct Index { 
  @State message: string = 'Hello World'; 
  aboutToAppear(): void { 
    let a:Student[] =  ['123', '234'].map((value) => { 
      return {name:"123"} as Student 
    }) 
    console.log('aa',JSON.stringify(a)) 
  } 
 
  build() { 
    Row() { 
      Column() { 
        Text(this.message) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}
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