How to Select One Object from the List of Objects

Select some objects from a list of objects based on list of one field

final ArrayList<MyNamedObject> namedObjectList = ...;
final List<String> nameList = ...;

Use

namedObjectList.stream()
   .filter((final MyNamedObject o) -> nameList.stream().anyMatch((final String name) -> Objects.equals(name, o.getName())))
   .collect(Collectors.toList());

If there are some duplicate values in the name list, either keep the list but use .distinct():

namedObjectList.stream()
    .filter((final MyNamedObject o) -> nameList.stream().distinct().anyMatch((final String name) -> Objects.equals(name, o.getName())))
    .collect(Collectors.toList());

or create a Set:

final Set<String> nameSet = nameList.stream()
    .distinct()
    .collect(Collectors.toSet());
namedObjectList.stream()
    .filter((final MyNamedObject o) -> nameSet.stream().anyMatch((final String name) -> Objects.equals(name, o.getName())))
    .collect(Collectors.toList());

If nameList or nameSet can contain null, use .filter(Objects::nonNull). If neither name nor o.getName() can be null, replace Objects.equals(name, o.getName()) by name.equals(o.getName()).

select some objects from object list through for loop based on a condition

You can use filter in computed property:

Vue.component('Child', {
  template: `
    <div>
      <div v-for="(guest, g) in myGuests" :key="g">
        {{ guest.name }} - {{ guest.age }}
      </div>
    </div>
  `,
  props: {
    guests: {
      type: Array,
      default: null,
    },
  },
  computed: {
    myGuests() {
      return this.guests.filter(g => g.age > 18)
    }
  }
})

new Vue({
  el: '#demo',
  data() {
    return {
      guests: [{'name': 'aa', 'age': 15}, {'name': 'bb', 'age': 21}, {'name': 'cc', 'age': 18}, {'name': 'dd', 'age': 19}, {'name': 'ee', 'age': 20}, {'name': 'ff', 'age': 24}]
    }
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="demo">
  <child :guests="guests"> </child>
</div>

how to select an object from a list of objects by its attribute in python

Try

dave = next(person for person in a.pList if person.num == 123)

for person in a.pList:
    if person.num == 123:
        break
else:
    print "Not found."
dave = person

How to find a single item in a list of objects?

FileCabinet fileCabinet = fileCabinets.SingleOrDefault(x => x.(propertyName) == (valueToMatch));

Like @Rainman said, if there is a probability that the name is not unique, use his solution. If you are sure that the Name property is unique, use this one.

Select a property from an array of objects based on a value : Javascript

You can use reduce and check if the checked property is true, then push (As pointed out by assoron) the value to the accumulator - there is no need for 2 loops:

const arr = [  { "value": "abc", "checked": true },  { "value": "xyz", "checked": false },  { "value": "lmn", "checked": true }]
const filtered = arr.reduce((a, o) => (o.checked && a.push(o.value), a), [])      console.log(filtered)

Selecting objects with list of other objects using LINQ

Your requirements essentially necessitate creating a new Team object with a reduced set of players (or alternatively permanently removing the younger players from the original Team object).

var teamsEnglandOnlyOver28Years =
    teams
    // Only teams from England
    .Where(t => t.Country == "England")
    // Create a new instance with only the older players
    .Select(t => new Team()
    {
        TeamName = t.TeamName,
        StadiumName = t.StadiumName,
        Players = t.Players.Where(p => p.Age > 28).ToList(),
        Country = t.Country       
    });

This may or may not be what you actually intend. It seems a bit awkward because, for example, the team name is the same as for the original team but the roster is reduced.