array_packages

A collection of array utility functions for common operations.

Usage

const arrayUtilsFunctions = require("arrays_packages");

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

console.log(arrayUtilsFunctions.minValue(arr)); // 1 console.log(arrayUtilsFunctions.maxValue(arr)); // 5 console.log(arrayUtilsFunctions.averageValue(arr)); // 3 console.log(arrayUtilsFunctions.firstNElement(arr, 2)); // [1,2] console.log(arrayUtilsFunctions.lastNElements(arr, 2)); // [4,5] console.log(arrayUtilsFunctions.reverseArray(arr)); // [5,4,3,2,1] console.log(arrayUtilsFunctions.removeAtIndex(arr, 2)); // [1,2,4,5] console.log(arrayUtilsFunctions.insertAtIndex(arr, 4, 6)); // [1,2,3,4,5,6] console.log(arrayUtilsFunctions.sumArray(arr)); // 18 console.log(arrayUtilsFunctions.shuffleArray(arr)); // [2,6,1,5,4] arrayUtilsFunctions.mapWithIndex(arr, (val, index) => { console.log(${index}: ${val}); }); // 0: 2, 1: 6, 2: 1, 3: 5, 4: 4

console.log(arrayUtilsFunctions.countOccurrences(arr)); //{ '1': 1, '2': 1, '4': 1, '5': 1, '6': 1 }

Reference

minValue(arr): Returns the minimum value from an array. maxValue(arr): Returns the maximum value from an array. averageValue(arr): Calculates the average value of elements in an array. firstNElement(arr, n): Returns the first N elements of an array. lastNElements(arr, n): Returns the last N elements of an array. reverseArray(arr): Reverses the elements of an array. removeAtIndex(arr, index): Removes an element from an array at a specified index. insertAtIndex(arr, index, value): Inserts an element into an array at a specified index. sumArray(arr): Calculates the sum of all elements in an array. shuffleArray(arr): Shuffles the elements of an array randomly. mapWithIndex(arr, callback): Applies a function to each element of an array along with its index. countOccurrences(arr): Counts the occurrences of each element in an array and returns an object with counts.