Count number of entries in an object having specific values in multiple keys JavaScript

Suppose, we have an array of objects like this −

const arr = [
   {"goods":"Wheat ", "from":"GHANA", "to":"AUSTRALIA"},
   {"goods":"Wheat", "from":"USA", "to":"INDIA"},
   {"goods":"Wheat", "from":"SINGAPORE", "to":"MALAYSIA"},
   {"goods":"Wheat", "from":"USA", "to":"INDIA"},
];

We are required to write a JavaScript function that takes in one such array. The goal of function is to return an array of all such objects from the original array that have value "USA" for the "from" property of objects and value "INDIA" for the "to" property of objects.

Example

const arr = [
   {"goods":"Wheat ", "from":"GHANA", "to":"AUSTRALIA"},
   {"goods":"Wheat", "from":"USA", "to":"INDIA"},
   {"goods":"Wheat", "from":"SINGAPORE", "to":"MALAYSIA"},
   {"goods":"Wheat", "from":"USA", "to":"INDIA"},
];
const findDesiredLength = (arr = [], from = 'USA', to = 'INDIA') => {
   const filtered = arr.filter(el => {
      if(el.from === from && el.to === to){
         return true;
      }
   });
   const { length: l } = filtered || [];
   return l;
};
console.log(findDesiredLength(arr));

Output

And the output in the console will be −

2

AmitDiwan

Published on 23-Nov-2020 06:17:30

• Related Questions & Answers
• Python dictionary with keys having multiple inputs
• How to count the number of columns having specific value in MySQL?
• Comparing objects in JavaScript and return array of common keys having common values
• Compare keys & values in a JSON object when one object has extra keys in JavaScript
• JavaScript: replacing object keys with an array
• JavaScript Count the number of unique elements in an array of objects by an object property?
• Changing value of nested object keys in JavaScript
• Iterate through Object keys and manipulate the key values in JavaScript
• Get multiple count in a single MySQL query for specific column values
• Search a value in an object with number keys with MongoDB
• MySQL query to select the values having multiple occurrence and display their count
• Get only specific values in an array of objects in JavaScript?
• Split array entries to form object in JavaScript
• How to count number of keys in a MongoDB document?
• Fetching object keys using recursion in JavaScript