@nknahom/lotide/without.js

Lotide is mini clone of the Lodash (https://lodash.com) library for learning JavaScript. What is Lodash? Lodash is a library that makes JavaScript easier by taking the hassle out of working with arrays, numbers, objects, strings, etc.

const eqArrays = function (array1, array2) {
  let isEqual = false;
  if (array1.length === array2.length) {
    array1.forEach((element, index) => {
      console.log("array2 with index: ", array2[index]);
      if (element !== array2[index]) {
        isEqual = false;
      } else {
        isEqual = true;
      }
    });
  }
  return isEqual;
};

const assertArraysEqual = function (array1, array2) {
  if (eqArrays(array1, array2)) {
    console.log(`\u2705 Assertion Passed: ${array1} === ${array2}`);
  } else {
    console.log(`\u26D4 Assertion Failed: ${array1} !== ${array2}`);
  }
};

const without = function (source, itemsToRemove) {
  // new copy of source that will be modified
  let results = source;
  for (let item of itemsToRemove) {
    if (results.includes(item)) {
      results.splice(source.indexOf(item), 1);
    }
  }
  console.log("results: ", results);
};

const words = ["hello", "world", "lighthouse"];
without(words, ["lighthouse"]); // no need to capture return value for this test case
// Make sure the original array was not altered by the without function
assertArraysEqual(["hello"], ["hello", "world", "lighthouse"]);
without([1, 2, 3], [1]); // => [2, 3]
without(["1", "2", "3"], [1, 2, "3"]); // => ["1", "2"]