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Lodash _.min


The lodash library provides a wide range of utility functions that can help in simplifying complex coding tasks. One of these functions is the _.min method which is used to retrieve the minimum value from an array of numbers or objects. The method works by iterating over each element in the array and returning the smallest value based on a provided criterion. This criterion can be passed as an optional function parameter which can be used to customize the comparison logic.

The _.min method has three parameters: the first parameter is the array of values to be processed, the second parameter is a function used to transform each element before comparison, and the third parameter is an optional function used to customize the comparison logic. The method returns the minimum value from the array based on the specified criterion.

If the array has a mix of invalid values such as null, undefined or NaN, the method will return NaN as the minimum value. If the array is empty, the method will return undefined.

Here is an example usage of the _.min method:

const numbers = [4, 2, 8, 6];
const min = _.min(numbers);
console.log(min); // Output: 2

In this example, the _.min method is used to retrieve the minimum value from an array of numbers. The method returns 2 which is the smallest value in the array.

Here is a more complex example with custom comparison logic:

const users = [
  { name: 'John', age: 30 },
  { name: 'Jane', age: 25 },
  { name: 'Mark', age: 35 },

const youngestUser = _.min(users, user => user.age);
console.log(youngestUser); // Output: { name: 'Jane', age: 25 }

In this example, the _.min method is used to retrieve the youngest user from an array of user objects. The second parameter is a function that transforms each user object to only compare the users based on their age property.

In conclusion, the lodash _.min method is a useful utility function for finding the minimum value from an array based on a provided criterion. It can be customized to fit different use cases and can simplify complex coding tasks.