How to loop inside array and assign to a variable

Question

In my angular2 application which contains checkboxes; the checkbox keys are stored in an array named "ticketselected" and the selected check boxes keys are stored in "selectedArray". I want to assign these keys one by one to a variable and use that variable. I need to splice an array. How can I implement this?

what I have done is:

component.ts

this.ticketSelected
    .map((entry, key) => {
         if (entry == true) {
             selectedArray.push(key);
            }
     })

 var index =   // This should be key
 allTickets.splice(index, 1);

'selectedArray' contains all selected keys.

How should I implement this?

EDIT

 deleteRequest
      .subscribe((data: any) => { // this data contain deleted data ie like {count:1}
                this.ticketSelected
                     .map((entry, key) => {
                      if (entry === true) {
                                selectedArray.push(key);
                       }
                 })

                 selectedArray.forEach((item) => {
                        var index = allTickets.indexOf(item);
                        console.log("index", index);
                        if (index != -1){
                            allTickets.splice(index, 1);
                    }
                    });
                })

First of all, replace entry == true with entry === true if you want to check the value of entry. Otherwise, that condition is going to be true for any truthy value. — Cerbrus
– Cerbrus, Commented Apr 10, 2017 at 8:56

Mihai Alexandru-Ionut · Accepted Answer · 2017-04-10 10:58:04Z

3

You should use indexOf method.

allTickets=allTickets.filter(function(item){
     return selectedArray.indexOf(item.id)==-1;
});

Atnoher solution is to use filter method which accepts a callback function, applied to every item in the array.

13 Comments

Khushi Over a year ago

thanks for your quick reply. i use this indexOf method. but it always return -1 . am adding my edited code.

Mihai Alexandru-Ionut Over a year ago

@NidhiMalhotra, you have syntax error in your edit. Maybe it is a mistake.

Mihai Alexandru-Ionut Over a year ago

This line :if (index != -1){allTickets); must be if (index != -1){

Mihai Alexandru-Ionut Over a year ago

Please tell me you is the structure of allTickets

Khushi Over a year ago

all tickets is array of objects like :[object, object, object]

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