Using FIND to search an array object results in an error: Type 'undefined' is not compatible with type ''

I'm currently attempting to search for an element within one array and then assign it to another array object.

However, I keep receiving the following error message:

Type 'ClosureSummary | undefined' is not assignable to type 'ClosureSummary'

var dt = $('#tbl_summary').DataTable();
let ids:string[]=[];
dt.rows({ page: 'current' }).nodes().each(function(item,index){
  ids.push(item.id)

});
console.info(ids);
this.liveBoundSummary.forEach(element=>{
  let pcode:string=element.ProjectCode;
  if(ids.includes(pcode)){
    let csItem:any;
    element=this.clSummary.find(x=>x.ProjectCode==pcode);

  }
});

When trying to insert values from the clSummary array into liveBoundSummary elements, I encounter the undefined error mentioned above.

It's important to note that both clSummary and liveBoundSummary are of the same type, ClosureSummary[].

Can someone provide guidance on how to resolve this issue?

Answer №1

After encountering the same problem, I found a solution by utilizing the non-null assertion operator (!). I wanted to share this fix with others who may come across a similar issue.

When performing the assignment, I adjusted it to:

element=this.clSummary.find(x=>x.ProjectCode==pcode)!;

Implementing this change resolved the problem for me.

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