angular - Declare variable in ngFor -

in angular2 project need present matrix. current code:

<tr *ngfor="let worker of workers">     <td class="{{worker.fired ? 'fired-worker':''}}">{{worker.lastname}}<br>{{worker.firstname}}</td>     <td *ngfor="let course of courses;" class="sk-table-sub-header">          <div *ngif="course.isgeneric">             <div class="col-xs-6" sc-dc [sc-dc-date]="matrix[worker.id][course.id].expiration">                 <date-picker (ondatechanged)="ondatechanged($event, worker, course, 'genericstartdate')" [date]="matrix[worker.id][course.id].genericstartdate></date-picker>             </div>             <div class="col-xs-6 training-table-rounded-cell" sc-dc [sc-dc-date]="matrix[worker.id][course.id].expiration">                 <date-picker (ondatechanged)="ondatechanged($event, worker, course, 'expiration')" [date]="matrix[worker.id][course.id].expiration" ></date-picker>             </div>                             </div>         ... 

as can see use matrix[worker.id][course.id].expiration multiple times. try avoid declaring variable this:

 <td *ngfor="let course of courses; let item = matrix[worker.id][course.id]" ...> 

but parse error:

 parser error: unexpected token [, expected identifier, keyword, or string @ column 44 in [ngfor let course of courses; let = matrix[worker.id][course.id]] in trainingplancomponent@44:20 ("r.fired ? 'fired-worker':''}}">{{worker.lastname}}<br>{{worker.firstname}}</td> 

is there way achieve intent?

thanks lot

you can't assign arbitrary values template variables.

• template variables can refer elements or components added
• exportas references can assigned template variables #xxx="ngform"
• local variables created directives index ngfor can assigned

there open issue support use case it's unclear if , when supported.

as workaround might consider wrapping part of template own component , pass values @input()s