adding exercise2

codeExamples/week1/introductionToJavascript-1/nodeVersion/arrayEverySome.js

+let atLeastOneOdd = [2, 6, 8, 1, 4].some(isOdd); 
+let allOdd1 = [2, 6, 8, 1, 4].every(isOdd); 
+let allOdd2 = [1, 3, 5, 9, 7].every(isOdd); 
+
+// index and array are optional
+function isOdd(elem, index, array){
+    return (elem % 2 === 1);
+}
+
+console.log(`atleastOneOdd: ${atLeastOneOdd}`)
+console.log(`allOdd1: ${allOdd1}`)
+console.log(`allOdd2: ${allOdd2}`)
\ No newline at end of file

exercises/exercise2/Exercise2Description.md

+# Exercise 2:
+
+## Due Date: Sunday January 16 2022, 11:59 PM 
+
+## Objectives: To get familiar with javascript functional prototypes, template strings, arrays and higher order javascript array functions and node modules.
+
+## Specifications/Requirements
+
+1. Description:
+   To complete this exercise you will be working in `index.js` and `presidents.js`. In `presidents.js` we have given you an array containing information about the 45 presidents of America. You need to export this array so other node modules can use it. In `index.js` we have given you a main function that you need to complete. You will be using the javascript functional prototype provided in the comments in order to obtain the required data and display it in the console using template strings to format output. You will be using the array defined in `presidents.js` as the array you will be acting upon inside of `main`.  
+
+2. Formating and output:
+   You will be logging all your results to the console, and the specification as to how the ouput should look are included in the comments above each exercise. If there are no specifications for an exercises output you may assume that there is no special formating associated with that exercise.
+
+3. Additional Notes:
+   You should not alter the presidents data we provide you with. This should go without saying, but you should not hardcode your results, we will check your submissions to make sure this does not happen. You should use the functional array prototypes that we have gone over in class and that are mentioned in this exercise (map, sort, filter, reduce), using for loops, for..of loops, while loops, etc will result in a substantial amount of point deduction.

exercises/exercise2/index.js

+function main() {
+	// Part 1 Questions
+	//================================================================================================
+
+	// Array.prototype.filter()
+	// 1. Filter the list of presidents for those who were born in the 1800's
+	let result1;
+
+	console.table(result1);
+
+  // Array.prototype.map()
+  // 2. Map the presidents name and party to a seperate array. Format: <president_name> (<party>)
+
+  let result2;
+
+  console.table(result2);
+
+  // Array.prototype.sort()
+  // 3. Sort the presidents by birthdate, by descending order (most recent to least recent dates)
+
+  let result3;
+
+  console.table(result3);
+
+  // Array.prototype.reduce()
+	// 4. How many years combined did all the presidents live? (Hint: Lookout for the presidents who are still alive)
+
+  let result4;
+
+  console.log(`Number of combined years presidents have lived: ${result4}`);
+
+  // sort/map Exercise
+  // 5. Sort the presidents names by name in ascending order, and map the time they took office to a new list. Format: <president_name> - <took_office>
+
+  let result5;
+
+  console.table(result5);
+
+  // Array.prototype.reduce()
+  // Hint: to check if a property exists in an object you can simply
+  // have the following check: if (obj.property_name)
+  // if the property exists on the obj object that will return true
+  // Additonally, reduce can take an empty object as its accumulator.
+  // 6. Sum up the number of times each political party held the presidency
+
+  let result6;
+
+	console.table(result6);
+}
+
+main()
\ No newline at end of file

exercises/exercise2/presidents.js

+const presidents = [
+    {
+      number: 1,
+      president: "George Washington",
+      birth_year: 1732,
+      death_year: 1799,
+      took_office: "1789-04-30",
+      left_office: "1797-03-04",
+      party: "No Party"
+    },
+    {
+      number: 2,
+      president: "John Adams",
+      birth_year: 1735,
+      death_year: 1826,
+      took_office: "1797-03-04",
+      left_office: "1801-03-04",
+      party: "Federalist"
+    },
+    {
+      number: 3,
+      president: "Thomas Jefferson",
+      birth_year: 1743,
+      death_year: 1826,
+      took_office: "1801-03-04",
+      left_office: "1809-03-04",
+      party: "Democratic-Republican"
+    },
+    {
+      number: 4,
+      president: "James Madison",
+      birth_year: 1751,
+      death_year: 1836,
+      took_office: "1809-03-04",
+      left_office: "1817-03-04",
+      party: "Democratic-Republican"
+    },
+    {
+      number: 5,
+      president: "James Monroe",
+      birth_year: 1758,
+      death_year: 1831,
+      took_office: "1817-03-04",
+      left_office: "1825-03-04",
+      party: "Democratic-Republican"
+    },
+    {
+      number: 6,
+      president: "John Quincy Adams",
+      birth_year: 1767,
+      death_year: 1848,
+      took_office: "1825-03-04",
+      left_office: "1829-03-04",
+      party: "Democratic-Republican"
+    },
+    {
+      number: 7,
+      president: "Andrew Jackson",
+      birth_year: 1767,
+      death_year: 1845,
+      took_office: "1829-03-04",
+      left_office: "1837-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 8,
+      president: "Martin Van Buren",
+      birth_year: 1782,
+      death_year: 1862,
+      took_office: "1837-03-04",
+      left_office: "1841-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 9,
+      president: "William Henry Harrison",
+      birth_year: 1773,
+      death_year: 1841,
+      took_office: "1841-03-04",
+      left_office: "1841-04-04",
+      party: "Whig"
+    },
+    {
+      number: 10,
+      president: "John Tyler",
+      birth_year: 1790,
+      death_year: 1862,
+      took_office: "1841-04-04",
+      left_office: "1845-03-04",
+      party: "Whig"
+    },
+    {
+      number: 11,
+      president: "James K. Polk",
+      birth_year: 1795,
+      death_year: 1849,
+      took_office: "1845-03-04",
+      left_office: "1849-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 12,
+      president: "Zachary Taylor",
+      birth_year: 1784,
+      death_year: 1850,
+      took_office: "1849-03-04",
+      left_office: "1850-07-09",
+      party: "Whig"
+    },
+    {
+      number: 13,
+      president: "Millard Fillmore",
+      birth_year: 1800,
+      death_year: 1874,
+      took_office: "1850-07-09",
+      left_office: "1853-03-04",
+      party: "Whig"
+    },
+    {
+      number: 14,
+      president: "Franklin Pierce",
+      birth_year: 1804,
+      death_year: 1869,
+      took_office: "1853-03-04",
+      left_office: "1857-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 15,
+      president: "James Buchanan",
+      birth_year: 1791,
+      death_year: 1868,
+      took_office: "1857-03-04",
+      left_office: "1861-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 16,
+      president: "Abraham Lincoln",
+      birth_year: 1809,
+      death_year: 1865,
+      took_office: "1861-03-04",
+      left_office: "1865-04-15",
+      party: "Republican"
+    },
+    {
+      number: 17,
+      president: "Andrew Johnson",
+      birth_year: 1808,
+      death_year: 1875,
+      took_office: "1865-04-15",
+      left_office: "1869-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 18,
+      president: "Ulysses S. Grant",
+      birth_year: 1822,
+      death_year: 1885,
+      took_office: "1869-03-04",
+      left_office: "1877-03-04",
+      party: "Republican"
+    },
+    {
+      number: 19,
+      president: "Rutherford B. Hayes",
+      birth_year: 1822,
+      death_year: 1893,
+      took_office: "1877-03-04",
+      left_office: "1881-03-04",
+      party: "Republican"
+    },
+    {
+      number: 20,
+      president: "James A. Garfield",
+      birth_year: 1831,
+      death_year: 1881,
+      took_office: "1881-03-04",
+      left_office: "1881-09-19",
+      party: "Republican"
+    },
+    {
+      number: 21,
+      president: "Chester A. Arthur",
+      birth_year: 1829,
+      death_year: 1886,
+      took_office: "1881-09-19",
+      left_office: "1885-03-04",
+      party: "Republican"
+    },
+    {
+      number: 22,
+      president: "Grover Cleveland",
+      birth_year: 1837,
+      death_year: 1908,
+      took_office: "1885-03-04",
+      left_office: "1889-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 23,
+      president: "Benjamin Harrison",
+      birth_year: 1833,
+      death_year: 1901,
+      took_office: "1889-03-04",
+      left_office: "1893-03-04",
+      party: "Republican"
+    },
+    {
+      number: 24,
+      president: "Grover Cleveland",
+      birth_year: 1837,
+      death_year: 1908,
+      took_office: "1893-03-04",
+      left_office: "1897-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 25,
+      president: "William McKinley",
+      birth_year: 1843,
+      death_year: 1901,
+      took_office: "1897-03-04",
+      left_office: "1901-09-14",
+      party: "Republican"
+    },
+    {
+      number: 26,
+      president: "Theodore Roosevelt",
+      birth_year: 1858,
+      death_year: 1919,
+      took_office: "1901-09-14",
+      left_office: "1909-03-04",
+      party: "Republican"
+    },
+    {
+      number: 27,
+      president: "William Howard Taft",
+      birth_year: 1857,
+      death_year: 1930,
+      took_office: "1909-03-04",
+      left_office: "1913-03-04",
+      party: "Republican"
+    },
+    {
+      number: 28,
+      president: "Woodrow Wilson",
+      birth_year: 1856,
+      death_year: 1924,
+      took_office: "1913-03-04",
+      left_office: "1921-03-04",
+      party: "Democratic"
+    },
+    {
+      number: 29,
+      president: "Warren G. Harding",
+      birth_year: 1865,
+      death_year: 1923,
+      took_office: "1921-03-04",
+      left_office: "1923-08-02",
+      party: "Republican"
+    },
+    {
+      number: 30,
+      president: "Calvin Coolidge",
+      birth_year: 1872,
+      death_year: 1933,
+      took_office: "1923-08-02",
+      left_office: "1929-03-04",
+      party: "Republican"
+    },
+    {
+      number: 31,
+      president: "Herbert Hoover",
+      birth_year: 1874,
+      death_year: 1964,
+      took_office: "1929-03-04",
+      left_office: "1933-03-04",
+      party: "Republican"
+    },
+    {
+      number: 32,
+      president: "Franklin D. Roosevelt",
+      birth_year: 1882,
+      death_year: 1945,
+      took_office: "1933-03-04",
+      left_office: "1945-04-12",
+      party: "Democratic"
+    },
+    {
+      number: 33,
+      president: "Harry S. Truman",
+      birth_year: 1884,
+      death_year: 1972,
+      took_office: "1945-04-12",
+      left_office: "1953-01-20",
+      party: "Democratic"
+    },
+    {
+      number: 34,
+      president: "Dwight D. Eisenhower",
+      birth_year: 1890,
+      death_year: 1969,
+      took_office: "1953-01-20",
+      left_office: "1961-01-20",
+      party: "Republican"
+    },
+    {
+      number: 35,
+      president: "John F. Kennedy",
+      birth_year: 1917,
+      death_year: 1963,
+      took_office: "1961-01-20",
+      left_office: "1963-11-22",
+      party: "Democratic"
+    },
+    {
+      number: 36,
+      president: "Lyndon B. Johnson",
+      birth_year: 1908,
+      death_year: 1973,
+      took_office: "1963-11-22",
+      left_office: "1969-01-20",
+      party: "Democratic"
+    },
+    {
+      number: 37,
+      president: "Richard Nixon",
+      birth_year: 1913,
+      death_year: 1994,
+      took_office: "1969-01-20",
+      left_office: "1974-08-09",
+      party: "Republican"
+    },
+    {
+      number: 38,
+      president: "Gerald Ford",
+      birth_year: 1913,
+      death_year: 2006,
+      took_office: "1974-08-09",
+      left_office: "1977-01-20",
+      party: "Republican"
+    },
+    {
+      number: 39,
+      president: "Jimmy Carter",
+      birth_year: 1924,
+      death_year: null,
+      took_office: "1977-01-20",
+      left_office: "1981-01-20",
+      party: "Democratic"
+    },
+    {
+      number: 40,
+      president: "Ronald Reagan",
+      birth_year: 1911,
+      death_year: 2004,
+      took_office: "1981-01-20",
+      left_office: "1989-01-20",
+      party: "Republican"
+    },
+    {
+      number: 41,
+      president: "George H. W. Bush",
+      birth_year: 1924,
+      death_year: 2018,
+      took_office: "1989-01-20",
+      left_office: "1993-01-20",
+      party: "Republican"
+    },
+    {
+      number: 42,
+      president: "Bill Clinton",
+      birth_year: 1946,
+      death_year: null,
+      took_office: "1993-01-20",
+      left_office: "2001-01-20",
+      party: "Democratic"
+    },
+    {
+      number: 43,
+      president: "George W. Bush",
+      birth_year: 1946,
+      death_year: null,
+      took_office: "2001-01-20",
+      left_office: "2009-01-20",
+      party: "Republican"
+    },
+    {
+      number: 44,
+      president: "Barack Obama",
+      birth_year: 1961,
+      death_year: null,
+      took_office: "2009-01-20",
+      left_office: "2017-01-20",
+      party: "Democratic"
+    },
+    {
+      number: 45,
+      president: "Donald J. Trump",
+      birth_year: 1946,
+      death_year: null,
+      took_office: "2017-01-20",
+      left_office: null,
+      party: "Republican"
+    }
+  ];
\ No newline at end of file

exercises/exercise2/testPresidents.js

+// Make a smaller array of the test data to run on
+// and export it
+// e.g. 3 presidents born in the 1800's , 2 in the pre 1800's  and 1 post 1800's
+

exercises/exercise2/tests.js

+// import data from testData.js and assign it to a variable
+
+function testFilter(testData, expectedData) {
+    let result = testData.filter()
+    if (result === expectedData) {
+        console.log('filter passed')
+    }  else {
+        // can also throw an error
+        console.log('filter failed')
+    }
+}
+
+testFilter()
\ No newline at end of file