done with skill s

src/01-functions.js

@@ -9,7 +9,10 @@
  *  alwaysTrue();
  *  //> true
  */
-function alwaysTrue() {}
+function alwaysTrue() {
+
+  return true
+}
 
 /**
  * greet()
@@ -24,7 +27,10 @@ function alwaysTrue() {}
  *  greet("Ian");
  *  //> "Hello, Ian."
  */
-function greet() {}
+function greet(name) {
+
+  return `Hello, ${name}.`
+}
 
 /**
  * add()
@@ -39,7 +45,10 @@ function greet() {}
  *  add(10, 20);
  *  //> 30
  */
-function add() {}
+function add(a, b) {
+
+  return a + b
+}
 
 /**
  * multiply()
@@ -54,7 +63,10 @@ function add() {}
  *  multiply(2, 5);
  *  //> 10
  */
-function multiply() {}
+function multiply(a, b) {
+
+  return a * b
+}
 
 /**
  * average()
@@ -74,7 +86,14 @@ function multiply() {}
  *  average(10, 6);
  *  //> 8 // 10 + 6 = 16; 16/2 = 8;
  */
-function average() {}
+function average(a, b) {
+
+  let sumNum = a + b
+
+  let answer = sumNum / 2
+
+  return answer
+}
 
 /**
  * averageThree()
@@ -93,7 +112,14 @@ function average() {}
  *  averageThree(10, 11, 19);
  *  //> 10 // 10 + 11 + 19 = 30; 30 / 3 = 10;
  */
-function averageThree() {}
+function averageThree(a, b, c) {
+
+  let threeSum = a + b + c
+
+  let answer = threeSum / 3
+
+  return answer
+}
 
 /**
  * compareTypes()
@@ -112,13 +138,25 @@ function averageThree() {}
  *  compareTypes("left", 10);
  *  //> false
  */
-function compareTypes() {}
+function compareTypes(a, b) {
+
+  if(typeof a === typeof b){
+
+    return true
+
+  } 
+  else {
+
+      return false
+
+  }
+}
 
 /**
  * flipSign()
  * ---------------------
  * Returns the negative of a positive integer, or the positive of a negative integer.
- * @param {number} a
+ * @param {number} 
  * @returns {number}
  *
  * HINT: Using pencil and paper, how would you make a positive number look negative?
@@ -131,8 +169,24 @@ function compareTypes() {}
  *  flipSign(50);
  *  //> -50
  */
-function flipSign() {}
+function flipSign(number) {
+
+  if(number > 0){
+
+    number *= -1
+
+    return number
+
+  } else {
+
+    number *= -1
+
+    return number
+
+  }
+
 
+}
 /**
  * joinStringsWithSpaces()
  * ---------------------
@@ -151,7 +205,10 @@ function flipSign() {}
  *  joinStringsWithSpaces("left", "right", "up", "down", "away");
  *  //> "left right up down away"
  */
-function joinStringsWithSpaces() {}
+function joinStringsWithSpaces(a, b, c, d, e) {
+
+  return `${a} ${b} ${c} ${d} ${e}`
+}
 
 /**
  * getFirstAndLastCharacter()
@@ -168,7 +225,15 @@ function joinStringsWithSpaces() {}
  *  getFirstAndLastCharacter("upwards");
  *  //> "us"
  */
-function getFirstAndLastCharacter() {}
+function getFirstAndLastCharacter(a) {
+
+
+  return a[0] + a[a.length - 1]
+}
+
+
+
+
 
 // Do not change the code below.
 module.exports = {

src/02-data-types.js

@@ -9,7 +9,10 @@
  *  getLengthOfString("down");
  *  //> 4
  */
-function getLengthOfString(str) {}
+function getLengthOfString(str) {
+
+  return str.length
+}
 
 /**
  * convertToNumber()
@@ -22,7 +25,12 @@ function getLengthOfString(str) {}
  *  convertToNumber("111");
  *  //> 111
  */
-function convertToNumber(val) {}
+function convertToNumber(val) {
+
+  val = +val
+
+  return val
+}
 
 /**
  * convertToString()
@@ -36,7 +44,12 @@ function convertToNumber(val) {}
  *  convertToString(99);
  *  //> "99"
  */
-function convertToString(val) {}
+function convertToString(val) {
+
+  val = val.toString()
+
+  return val
+}
 
 /**
  * convertToShoutingText()
@@ -49,7 +62,12 @@ function convertToString(val) {}
  *  convertToShoutingText("Hello There");
  *  //> "HELLO THERE"
  */
-function convertToShoutingText(text) {}
+function convertToShoutingText(text) {
+
+  text = text.toUpperCase()
+
+  return text
+}
 
 /**
  * convertToWhisperText()
@@ -62,7 +80,12 @@ function convertToShoutingText(text) {}
  *  convertToWhisperText("Hello There");
  *  //> "hello there"
  */
-function convertToWhisperText(text) {}
+function convertToWhisperText(text) {
+
+  text = text.toLowerCase()
+
+  return text
+}
 
 /**
  * checkIfCharacterIsInString()
@@ -79,7 +102,17 @@ function convertToWhisperText(text) {}
  *  checkIfCharacterIsInString("hello there", "a");
  *  //> false
  */
-function checkIfCharacterIsInString(text, character) {}
+function checkIfCharacterIsInString(text, character) {
+
+  if(text.includes(character)){
+
+    return true
+
+  }else {
+
+    return false
+  }
+}
 
 /**
  * isEven()
@@ -95,7 +128,18 @@ function checkIfCharacterIsInString(text, character) {}
  *  isEven(11);
  *  //> false
  */
-function isEven(num) {}
+function isEven(num) {
+
+  if(num % 2 === 0){
+
+    return true
+
+  }else {
+
+    return false
+  }
+
+}
 
 /**
  * isOdd()
@@ -111,7 +155,17 @@ function isEven(num) {}
  *  isOdd(11);
  *  //> true
  */
-function isOdd(num) {}
+function isOdd(num) {
+
+  if(num % 2 !== 0){
+
+    return true
+
+  }else {
+
+    return false
+  }
+}
 
 /**
  * isTruthy()