I possess an array containing objects of different lengths depending on the chosen city. How can I pinpoint the element that contains an object with a specific property?

Question

I possess an array containing objects of different lengths depending on the chosen city. How can I pinpoint the element that contains an object with a specific property?

My dilemma arises from the fact that the length of an array depends on the selected city, making it impossible to select elements using an index. In this scenario, I need to devise a method to choose elements based on the value of one of their properties.

In particular, I am interested in selecting elements containing objects with the property types: ['locality', 'political'].

For instance, consider the following results (excluding the first 7 array elements as they are irrelevant):

7:
    address_components: (3) [{…}, {…}, {…}]
    types: Array(2)
        0: "locality"
        1: "political"

8:
    address_components: (2) [{…}, {…}]
    types: Array(2)
        0: "administrative_area_level_1"
        1: "political"

Each element features a types property represented as an array. My current aim is to identify the element at index 7 based on types: ['locality', 'political'] rather than its index.

Unfortunately, I haven't figured out how to achieve this yet, so I haven't written any code segments.

[
  {
    "address_components": [
      ...
    ],
    "formatted_address": ...,
    "geometry": {
      ...
    },
    "place_id": ...,
    "plus_code": {
      ...
    },
    "types": [
      ...
    ]
  },
  ...
]

javascript

Answer 1

Answer №1

To locate the element containing all of the specified types, you can use the following code:

 array.find(item => ['locality', 'political'].every(type => item.types.includes(type)))

Answer 2

To locate the element containing all of the specified types, you can use the following code:

 array.find(item => ['locality', 'political'].every(type => item.types.includes(type)))

Answer 3

Answer №2

Let's take a closer look at the situation.

Dilemma: you possess an array of objects and must identify and retrieve the one with the appropriate types array.

Initially, we must inspect each object in the array — a for loop is suitable for this task. Specifically, utilizing the for(... of ...) pattern:

for(let object of array){
    /* perform actions */
}

Next, it's imperative to evaluate each object based on the defined criteria. Since examining each object's types property is essential, we will begin here:

for(let object of array){
    if(someKindOfTest(object.types)){
        return object;
    }
}

How can we conduct this evaluation effectively? Assuming we know the types we seek...

let requiredTypes = ["locality"];

for(let object of array){
    if(someKindOfTest(object.types)){
        return object;
    }
}

We can create a test that only succeeds if the object contains all specified types. This calls for another loop:

let requiredTypes = ["locality"];

for(let object of array){
    let hasAllRequiredTypes = true;

    //  check for each required type

    for(let requiredType of requiredTypes){
        if(!object.types.includes(requiredType)){
            // this object does not match a required type, disqualifying it

            hasAllTypes = false; // mark this object as disqualified
            break; // exit the loop over required types
        }
    }

    if(hasAllRequiredTypes) return object;
}

This process can be condensed into a more concise and "functional" form (@jonas-wilms answer serves as an excellent example), yet outlining the fundamental mechanisms and problem-solving approach behind devising such an algorithm proves beneficial.

Answer 4

Let's take a closer look at the situation.

Dilemma: you possess an array of objects and must identify and retrieve the one with the appropriate types array.

Initially, we must inspect each object in the array — a for loop is suitable for this task. Specifically, utilizing the for(... of ...) pattern:

for(let object of array){
    /* perform actions */
}

Next, it's imperative to evaluate each object based on the defined criteria. Since examining each object's types property is essential, we will begin here:

for(let object of array){
    if(someKindOfTest(object.types)){
        return object;
    }
}

How can we conduct this evaluation effectively? Assuming we know the types we seek...

let requiredTypes = ["locality"];

for(let object of array){
    if(someKindOfTest(object.types)){
        return object;
    }
}

We can create a test that only succeeds if the object contains all specified types. This calls for another loop:

let requiredTypes = ["locality"];

for(let object of array){
    let hasAllRequiredTypes = true;

    //  check for each required type

    for(let requiredType of requiredTypes){
        if(!object.types.includes(requiredType)){
            // this object does not match a required type, disqualifying it

            hasAllTypes = false; // mark this object as disqualified
            break; // exit the loop over required types
        }
    }

    if(hasAllRequiredTypes) return object;
}

This process can be condensed into a more concise and "functional" form (@jonas-wilms answer serves as an excellent example), yet outlining the fundamental mechanisms and problem-solving approach behind devising such an algorithm proves beneficial.

I possess an array containing objects of different lengths depending on the chosen city. How can I pinpoint the element that contains an object with a specific property?

Answer №1

Answer №2

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