how to use the transform function from lodash in javascript

The transform function from the Lodash library in JavaScript can be used to iterate over a collection of elements, such as an object or an array, and accumulate a result by invoking an iteratee function for each element.

Here is the basic syntax for using the transform function:

index.tsx
_.transform(collection, [iteratee=_.identity], [accumulator])
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Where:

• collection is the collection of elements to iterate over.
• iteratee is the function that is invoked for each element in the collection. It takes three arguments: (accumulator, value, key|index, collection)
• accumulator is the initial value of the accumulator.

Here is an example of how to use transform to add up all the values in an array:

index.tsx
const _ = require('lodash');

const nums = [1, 2, 3, 4, 5];

const sum = _.transform(nums, (acc, n) => {
  acc += n;
  return acc;
}, 0);

console.log(sum); // Output: 15
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In this example, the transform function iterates over the nums array, and invokes the iteratee function for each element. The iteratee function adds each element to the accumulator, and returns the new value of the accumulator. Finally, the transform function returns the final value of the accumulator, which is the sum of all the values in the array.