Added a solution for coding-Challenge-6.

question1-solution.js

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+/* Question 1: 
+Clean the room function: given an input of [1,2,4,591,392,391,2,5,10,2,1,1,1,20,20], 
+make a function that organizes these into individual array that is ordered. 
+For example answer(ArrayFromAbove) should return: [[1,1,1,1],[2,2,2], 4,5,10,[20,20], 391, 392,591].
+Bonus: Make it so it organizes strings differently from number types. i.e. [1, "2", "3", 2] should return [[1,2], ["2", "3"]] */
+
+const input = [
+  4,
+  1,
+  2,
+  4,
+  591,
+  392,
+  391,
+  '2',
+  5,
+  10,
+  '23',
+  '1',
+  '1',
+  '4',
+  '4',
+  '4',
+  2,
+  1,
+  1,
+  1,
+  4,
+  20,
+  20,
+];
+
+function getArrayByType(inputArray, type) {
+  return inputArray.filter((item) => typeof item === type);
+}
+
+function getMap(array) {
+  const itemsMap = new Map();
+
+  array.forEach((item) => {
+    const mapItem = itemsMap.get(item);
+
+    if (mapItem) {
+      itemsMap.set(item, [...mapItem, item]);
+    } else {
+      itemsMap.set(item, [item]);
+    }
+  });
+
+  return itemsMap;
+}
+
+function organize(array) {
+  const result = [];
+  const mappedItems = getMap(array);
+
+  mappedItems.forEach((item) => {
+    result.push(item.length === 1 ? item[0] : item);
+  });
+
+  return result;
+}
+
+function cleanTheRoom(array) {
+  const strings = getArrayByType(array, 'string');
+  const numbers = getArrayByType(array, 'number');
+
+  const numbersResult = organize(numbers);
+  const stringsResult = organize(strings);
+
+  return stringsResult.concat(numbersResult);
+}
+
+console.log(cleanTheRoom(input));

question2-solution.js

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+/*Question 2: 
+Write a javascript function that takes an array of numbers and a target number. 
+The function should find two different numbers in the array that, when added together, 
+give the target number. For example: answer([1,2,3], 4)should return [1,3]
+ */
+
+const inputArray = [1, 2, 1, 1, 1, 1, 13];
+const targetNumber = 14;
+
+function findPairs(input, target) {
+  for (const element of input) {
+    const pair = input.find((item) => item + element === target);
+    if (pair) {
+      return [element, pair];
+    }
+  }
+
+  return 'error. there is no pairs with given target value.';
+}
+
+findPairs(inputArray, targetNumber);

question3-solution.js

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+/*
+Question 3: 
+Write a function that converts HEX to RGB. 
+Then Make that function autodect the formats so that if you enter HEX color format it returns RGB and if you enter RGB color format it returns HEX. 
+Bonus: Release this tool as a npm package.*/
+
+const HEX = 'HEX';
+const RGB = 'RGB';
+
+function determineColorType(color) {
+  return /^#[0-9A-F]{6}[0-9a-f]{0,2}$/i.test(color) ? HEX : RGB;
+}
+
+function stringToHex(component) {
+  var hex = component.toString(16);
+  return hex.length == 1 ? '0' + hex : hex;
+}
+
+function convertHexToRgb(hex) {
+  var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
+  return result
+    ? [
+        'rgb(',
+        parseInt(result[1], 16),
+        ',',
+        parseInt(result[2], 16),
+        ',',
+        parseInt(result[3], 16),
+        ')',
+      ].join('')
+    : null;
+}
+
+function stringToRGB(stringColor) {
+  var matches = /rgb\((\d+),(\d+),(\d+)\)/.exec(stringColor);
+  return matches
+    ? {
+        r: parseInt(matches[1]),
+        g: parseInt(matches[2]),
+        b: parseInt(matches[3]),
+      }
+    : null;
+}
+
+function convertRgbToHex(input) {
+  const rgb = stringToRGB(input);
+  return '#' + stringToHex(rgb?.r) + stringToHex(rgb?.g) + stringToHex(rgb?.b);
+}
+
+function convertColor(input) {
+  const colorType = determineColorType(input);
+  switch (colorType) {
+    case HEX:
+      return convertHexToRgb(input);
+    case RGB:
+      return convertRgbToHex(input);
+    default:
+      'error. The requested color type is not supported by this converter.';
+      break;
+  }
+}
+
+console.log('Test data:', '#D46A6A', '#801515', '#D66A6A');
+console.log(convertColor('#D46A6A'));
+console.log(convertColor('#801515'));
+console.log(convertColor('#D66A6A'));
+console.log('---------------------------------');
+console.log(convertColor(convertColor('#D46A6A')));
+console.log(convertColor(convertColor('#801515')));
+console.log(convertColor(convertColor('#D66A6A')));
+
+// NPM package link: https://github.com/IlonaZaika/my-color-converter