将exactPageList分配给pagefield时如何将其从any转换为any []？

Question

我在开发 angular 7 个应用程序我在分页时遇到问题无法将 exactpagelist any 分配给 pagefield any[] .

因为 pagefield 是 array 类型，而 exactpagelist 是 any 类型。

这一行的函数 totalNoOfPages 的最后一行存在问题

this.pageField = this.exactPageList;
this.pageField = 2; not correct

我预计会

this.pageField = [1,2];

意味着我需要转换 this.exactPageList；到要接受的数组分配给页面字段怎么做？

pageField:any[];
exactPageList:any;
totalNoOfPages() {  

    this.paginationData = Number(this.totalReportCount / this.ReportPerPage);  
    console.log("pagination data :" + this.paginationData)
    let tempPageData = this.paginationData.toFixed(); 
    console.log("tempPageData data :" + tempPageData) 
    if (Number(tempPageData) < this.paginationData) {  
      this.exactPageList = Number(tempPageData) + 1;  
      this.paginationService.exactPageList = this.exactPageList;  
      console.log("exactPageList1  data :" + this.exactPageList ) 
    } else {  
      this.exactPageList = Number(tempPageData);  
      this.paginationService.exactPageList = this.exactPageList  
      console.log("exactPageList2  data" + this.exactPageList ) 
    }  
    this.paginationService.pageOnLoad();  
    this.pageField = this.exactPageList;    

  }

上面代码的结果如下：

pagination data1.0666666666666667
reportdetails.component.ts:265 tempPageData data1
reportdetails.component.ts:269 exactPageList1  data2
reportdetails.component.ts:263 pagination data1.0666666666666667
reportdetails.component.ts:265 tempPageData data1
reportdetails.component.ts:269 exactPageList1  data2

预期结果

this.pageField = [1,2];

Answer 1

使用评论的一些解释：

this.paginationData = Number(this.totalReportCount / this.ReportPerPage);  
console.log("pagination data :" + this.paginationData)
// Use Math.round instead. Then you get an numeral and not a string.
let tempPageData = this.paginationData.toFixed(); 
console.log("tempPageData data :" + tempPageData) 
// Then Number() is not necessary here anymore.
// Moreover as far as I understand, you actually want to use always the 'bigger number'. 
// That means, actually it would make sense to use Math.ceil() above.
// In that case, you don't need to use a condition at all.
if (Number(tempPageData) < this.paginationData) {  
  this.exactPageList = Number(tempPageData) + 1;  
  this.paginationService.exactPageList = this.exactPageList;  
  console.log("exactPageList1  data :" + this.exactPageList ) 
} else {  
  // You are doing almost the same like in the condition clause above.
  // It would be enough to set this.exactPageList condtionally and do the rest afterwards.
  this.exactPageList = Number(tempPageData);  
  this.paginationService.exactPageList = this.exactPageList  
  console.log("exactPageList2  data" + this.exactPageList ) 
}  
this.paginationService.pageOnLoad();  
this.pageField = this.exactPageList;

我会做什么：

this.paginationData = Number(this.totalReportCount / this.ReportPerPage);  
console.log("pagination data :", this.paginationData)
let tempPageData = Math.ceil(this.paginationData);
console.log("tempPageData data :", tempPageData) 
// Let's create an array from 1 .. N
// [...Array(4).keys()] would create an array with [0,1,2,3]
// but we want to have [1,2,3,4], that's why we are incrementing every value by using map(). 
// Think about moving this to an own method 'getOneToNArray' or so for a better readability.
this.exactPageList = [...Array(tempPageData).keys()].map(x => ++x);;
this.paginationService.exactPageList = this.exactPageList;  
console.log("exactPageList data :", this.exactPageList )   
this.paginationService.pageOnLoad();  
this.pageField = this.exactPageList;

将exactPageList分配给pagefield时如何将其从any转换为any []？

How to convert exactPageList from any to any[] when assign it to pagefield?

javascript

typescript

angular-directive

angular-components

angular7