angular - Show an array with ngFor separated by type -


i trying show array using *ngfor can not figure out how show in way want. example, next array:

[bmw, apple, mercedes, lg, banana, iphone]

is array of objects use pipe filter array type property , in case have car type, food type , mobile type. array ordered be:

[bmw, mercedes, apple, banana, iphone, lg]

well, problem want show in way:

cars:  -bmw -mercedes  food  -apple -banana  mobile  -iphone -lg

using template:

<div *ngfor="let item of items | orderpipe" >     <div *nfif="item.type == 'car'>         <h3>cars</h3>         {{ item.name }}     </div> </div>

but is:

cars   -bmw cars -mercedes  food -apple food -banana  mobile -iphone mobile -lg

if array ordered type showed, add an*ngif around header:

<div *ngfor="let item of items | orderpipe; let i=index"" >     <h3 *ngif="i==0 || items[i-1].type!=items[i].type">{{item.type}}</h3>         {{ item.name }}     </div> </div>

this print header on first iteration,i==0, , each time type changes -- items[i-1].type != items[i].type.


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