Tips for identifying the name property within an array of Objects

Question

Tips for identifying the name property within an array of Objects

I'm currently working on extracting values from an array of objects based on their IDs, but I've hit a roadblock. The issue lies in the fact that I have this array of objects and I'm unsure about how to properly iterate through them. While I understand that using the .map method might solve my problem, I am still new to implementing it.

Essentially, what I want is for my method to take an ID as input and return the corresponding name value from the object containing that ID.

https://i.sstatic.net/hudWM.png

Any suggestions on how I can improve my iteration process? Currently, my approach looks like this:

getName(field_id: any): any {
var aux = 0;

  var obj = this.customFields[aux].filter(function (obj) {
    return obj.name === field_id;       
  })[0];
  aux ++;
}

It seems that my iterator "aux" isn't doing its job correctly. Any help would be greatly appreciated.

javascript arrays object dictionary

Answer 1

Answer №1

When dealing with an array that contains objects, you have the option of using the filter function instead of resorting to the indexer.

var arr = [
  {id: 1, name: "hello"},
  {id: 2, name: "world"},
  {id: 3, name: "foo"},
  {id: 4, name: "bar"},
  {id: 5, name: "baz"}
]
var id=3
var obj = arr.filter(function(obj) {

  return obj.id === id;
})
console.log(obj[0].name)

Answer 2

When dealing with an array that contains objects, you have the option of using the filter function instead of resorting to the indexer.

var arr = [
  {id: 1, name: "hello"},
  {id: 2, name: "world"},
  {id: 3, name: "foo"},
  {id: 4, name: "bar"},
  {id: 5, name: "baz"}
]
var id=3
var obj = arr.filter(function(obj) {

  return obj.id === id;
})
console.log(obj[0].name)

Answer 3

Answer №2

One potential solution could be to troubleshoot by comparing the name with the id directly. In order to avoid repetitive loops:

// To pinpoint the accurate entry linked to the desired id
var correctField = this.customFields.find(function(field) {
  return field.id === field_id;
});
// Subsequently, extract the name from that specific entry
var nameToFind = correctField && correctField.name;

Note that the necessity to replace 'find' method may vary according to browser compatibility.

An alternate approach: this.customFields.filter()[0]

Answer 4

One potential solution could be to troubleshoot by comparing the name with the id directly. In order to avoid repetitive loops:

// To pinpoint the accurate entry linked to the desired id
var correctField = this.customFields.find(function(field) {
  return field.id === field_id;
});
// Subsequently, extract the name from that specific entry
var nameToFind = correctField && correctField.name;

Note that the necessity to replace 'find' method may vary according to browser compatibility.

An alternate approach: this.customFields.filter()[0]

Answer 5

Answer №3

To implement this functionality, you can utilize a for loop like the example provided below:

var array = [{id:1,name:"abc"},{id:2,name:"pqr"},{id:3,name:"lmn"}]

function findNameById(id){
  for(var index=0;index<array.length;index++)
    if(array[index].id==id)
      return array[index].name;
   return null 
}

findNameById(2);// Output will be "pqr"

Answer 6

To implement this functionality, you can utilize a for loop like the example provided below:

var array = [{id:1,name:"abc"},{id:2,name:"pqr"},{id:3,name:"lmn"}]

function findNameById(id){
  for(var index=0;index<array.length;index++)
    if(array[index].id==id)
      return array[index].name;
   return null 
}

findNameById(2);// Output will be "pqr"

Tips for identifying the name property within an array of Objects

Answer №1

Answer №2

Answer №3

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