Determine the frequency of occurrences of a JSON property with a similar name

Question

Determine the frequency of occurrences of a JSON property with a similar name

I am working on a Vue application that receives a JSON object as shown below. My task is to calculate the count of items where _Valid is set to true. I am not very familiar with the Reduce method in JavaScript and I'm unsure how to filter based on a specific part of a key name. Can someone guide me on where to start? Is this even achievable?

{
    "F_Mountain1_Week": "1",
    "F_Mountain1_Date": "2021-11-12",
    "F_Mountain1_Valid": true,
    "F_Mountain2_Week": "1",
    "F_Mountain2_Date": "2021-11-12",
    "F_Mountain2_Valid": true,
    "F_Mountain3_Week": "1",
    "F_Mountain3_Date": "2021-11-12",
    "F_Mountain3_Valid": true,
    "F_Mountain4_Week": "",
    "F_Mountain4_Date": "2021-11-12",
    "F_Mountain4_Valid": false,
    "F_Mountain5_Week": "",
    "F_Mountain5_Date": "2021-11-12",
    "F_Mountain5_Valid": false,
    "F_Mountain6_Week": "",
    "F_Mountain6_Date": "2021-11-12",
    "F_Mountain6_Valid": false,
    "F_Mountain7_Week": "",
    "F_Mountain7_Date": "2021-11-12",
    "F_Mountain7_Valid": false,
    "F_Mountain8_Week": "",
    "F_Mountain8_Date": "2021-11-12",
    "F_Mountain8_Valid": false,
}

javascript vue.js

Answer 1

Answer №1

This method can also be used

By utilizing the entries and filter functions. Initially, extract the key and value pairs from the data object and then apply a filter based on conditions involving the value and key attributes.

let information = {
    F_Mountain1_Week: "1",
    F_Mountain1_Date: "2021-11-12",
    F_Mountain1_Valid: true,
    // Rest of the data properties...
};

console.log(
    Object.entries(information).filter(([key, value]) =>  key.endsWith("_Valid") && value)
        .length
);

Answer 2

This method can also be used

By utilizing the entries and filter functions. Initially, extract the key and value pairs from the data object and then apply a filter based on conditions involving the value and key attributes.

let information = {
    F_Mountain1_Week: "1",
    F_Mountain1_Date: "2021-11-12",
    F_Mountain1_Valid: true,
    // Rest of the data properties...
};

console.log(
    Object.entries(information).filter(([key, value]) =>  key.endsWith("_Valid") && value)
        .length
);

Answer 3

Answer №2

To iterate through the array and determine the count of properties that end with "_Valid" and have a value of true, you can utilize the reduce method like this:

Object.keys(obj).reduce((acc, curr) => curr.endsWith("_Valid") && obj[curr] ? acc + 1 : acc, 0)

Alternatively, you can achieve the same result using the filter method:

Object.keys(obj).filter((k) => k.endsWith("_Valid") && obj[k]).length;

const obj = {
  F_Mountain1_Week: "1",
  F_Mountain1_Date: "2021-11-12",
  F_Mountain1_Valid: true,
  F_Mountain2_Week: "1",
  F_Mountain2_Date: "2021-11-12",
  F_Mountain2_Valid: true,
  F_Mountain3_Week: "1",
  F_Mountain3_Date: "2021-11-12",
  F_Mountain3_Valid: true,
  F_Mountain4_Week: "",
  F_Mountain4_Date: "2021-11-12",
  F_Mountain4_Valid: false,
  F_Mountain5_Week: "",
  F_Mountain5_Date: "2021-11-12",
  F_Mountain5_Valid: false,
  F_Mountain6_Week: "",
  F_Mountain6_Date: "2021-11-12",
  F_Mountain6_Valid: false,
  F_Mountain7_Week: "",
  F_Mountain7_Date: "2021-11-12",
  F_Mountain7_Valid: false,
  F_Mountain8_Week: "",
  F_Mountain8_Date: "2021-11-12",
  F_Mountain8_Valid: false,
};

const result = Object.keys(obj).reduce((acc, curr) => curr.endsWith("_Valid") && obj[curr] ? acc + 1 : acc, 0);

console.log(result);

Answer 4

To iterate through the array and determine the count of properties that end with "_Valid" and have a value of true, you can utilize the reduce method like this:

Object.keys(obj).reduce((acc, curr) => curr.endsWith("_Valid") && obj[curr] ? acc + 1 : acc, 0)

Alternatively, you can achieve the same result using the filter method:

Object.keys(obj).filter((k) => k.endsWith("_Valid") && obj[k]).length;

const obj = {
  F_Mountain1_Week: "1",
  F_Mountain1_Date: "2021-11-12",
  F_Mountain1_Valid: true,
  F_Mountain2_Week: "1",
  F_Mountain2_Date: "2021-11-12",
  F_Mountain2_Valid: true,
  F_Mountain3_Week: "1",
  F_Mountain3_Date: "2021-11-12",
  F_Mountain3_Valid: true,
  F_Mountain4_Week: "",
  F_Mountain4_Date: "2021-11-12",
  F_Mountain4_Valid: false,
  F_Mountain5_Week: "",
  F_Mountain5_Date: "2021-11-12",
  F_Mountain5_Valid: false,
  F_Mountain6_Week: "",
  F_Mountain6_Date: "2021-11-12",
  F_Mountain6_Valid: false,
  F_Mountain7_Week: "",
  F_Mountain7_Date: "2021-11-12",
  F_Mountain7_Valid: false,
  F_Mountain8_Week: "",
  F_Mountain8_Date: "2021-11-12",
  F_Mountain8_Valid: false,
};

const result = Object.keys(obj).reduce((acc, curr) => curr.endsWith("_Valid") && obj[curr] ? acc + 1 : acc, 0);

console.log(result);

Answer 5

Answer №3

Traditional approach

let info = {
    F_Ocean1_Month: "1",
    F_Ocean1_Date: "2022-10-25",
    F_Ocean1_Valid: true,
    F_Ocean2_Month: "3",
    F_Ocean2_Date: "2022-12-07",
    F_Ocean2_Valid: false,
    F_Ocean3_Month: "5",
    F_Ocean3_Date: "2023-02-14",
    F_Ocean3_Valid: true,
    F_Ocean4_Month: "7",
    F_Ocean4_Date: "2023-04-01",
    F_Ocean4_Valid: false
};

for (var key in info) {
    if (typeof info[key] == 'function') continue;
    if(/_Valid$/.test(key) && info[key] === true) {
        console.log('SUCCESS!')
    } else {
        console.log('Irrelevant property:\n')
        console.log(`Key name: ${key} - Value: ${info[key]}`);
    }
}

Answer 6

Traditional approach

let info = {
    F_Ocean1_Month: "1",
    F_Ocean1_Date: "2022-10-25",
    F_Ocean1_Valid: true,
    F_Ocean2_Month: "3",
    F_Ocean2_Date: "2022-12-07",
    F_Ocean2_Valid: false,
    F_Ocean3_Month: "5",
    F_Ocean3_Date: "2023-02-14",
    F_Ocean3_Valid: true,
    F_Ocean4_Month: "7",
    F_Ocean4_Date: "2023-04-01",
    F_Ocean4_Valid: false
};

for (var key in info) {
    if (typeof info[key] == 'function') continue;
    if(/_Valid$/.test(key) && info[key] === true) {
        console.log('SUCCESS!')
    } else {
        console.log('Irrelevant property:\n')
        console.log(`Key name: ${key} - Value: ${info[key]}`);
    }
}

Determine the frequency of occurrences of a JSON property with a similar name

Answer №1

Answer №2

Answer №3

Traditional approach

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