nickjbianco/expedite

JavaScript library for utility functions built with ES6 and fully tested with Jest.

Expedite

Expedite is a JavaScript utility library for common operations with arrays, objects, strings, numbers and more. It is built with ES6 and has full test coverage with Jest. Expedite has 30+ methods including flatten, xor, join, and more.

Setup Instructions

1. Clone library to local computer.
2. Run npm run build to build the library.
3. Open Node REPL by running node.
4. Assign the library import to a variable (see code below).

const expedite = require("./expedite.js").default;

5. Use any of libraries built-in methods.

> expedite.flatten([[1, 2], [3]])
[ 1, 2, 3 ]

Sample Code

The flatten function takes an array of any number of dimensions and returns the elements in a one dimensional array.

const flatten = (anyList) => {
  let flatList = [];

  anyList.forEach((element) => {
    if (Array.isArray(element)) {
      flatList = flatList.concat(flatten(element));
    } else {
      flatList.push(element);
    }
  });

  return flatList;
};

The shuffle function accepts an array and returns a new array in a randomly shuffled order.

const shuffle = (list) => {
  const shuffledList = [];

  while (list.length > 0) {
    const randomIdx = Math.floor(Math.random() * list.length);
    shuffledList.push(list[randomIdx]);
    list.splice(randomIdx, 1);
  }

  return shuffledList;
};

The parsedInt function accepts a string and converts it into an integer in radix 10.

const parsedInt = (str) => {
  if (str.length === 0) return str;

  const intList = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
  let finalInt = 0;
  for (let i = 0; i < str.length; i++) {
    const currEle = str[i];
    intList.forEach((int) => {
      if (`${int}` === currEle) finalInt = finalInt * 10 + int;
    });
  }

  return finalInt;
};