PSET5

pset1.js

@@ -10,10 +10,19 @@ if invalid input given, return -1
 ******************/
 
 function myAge( ageNow, numYears ) {
-
+    howOld = (ageNow + numYears);
+    if ((howOld) > 100) {
+        return NaN
+    } else if (typeof (howOld) != typeof(1)) {
+        return -1
+    } else {
+        return howOld
+    }      
 }
 
-
+console.log(myAge(28, 5))
+console.log(myAge(50, 51))
+console.log(myAge("text", 2))
 
 /******************
 Concatenate Strings
@@ -30,10 +39,11 @@ Concatenating string variables
 ******************/
 
 function myConcatenate( firstStr, secondStr, thirdStr ) {
-
+    let mySentence = (firstStr + " " + secondStr + " " + thirdStr);
+    return mySentence;
 }
 
-myConcatenate('I', 'am', 'iron man'); // 'I am iron man'
+console.log(myConcatenate('I', 'am', 'iron man')); // 'I am iron man'
 
 /******************
 Subtract Function
@@ -45,9 +55,15 @@ Ensure that both of the inputs are numbers
 ******************/
 
 function subtract(a,b) {
-
+    if (typeof(a) === "number" && typeof(b) === "number") {
+        return (a - b);
+    }
 }
 
+console.log(typeof(typeof(1)))
+console.log(subtract(50,45))
+console.log(subtract(45,50))
+
 /******************
 Area of A Circle
 
@@ -61,10 +77,12 @@ A = π * r2, where is π is Pi and r is the radius squared
 
 
 function areaOfaCircle(radius){
-
-
+    let areaCircle = (Math.PI * (radius ** 2));
+    return areaCircle;
 }    
 
+console.log(areaOfaCircle(5));
+
 /******************
 Temperature Converter Fahrenheit to Celsius
 
@@ -75,6 +93,11 @@ Now store a fahrenheit temperature into a variable.
 Convert it to celsius and output "NN°F is NN°C."
 ******************/
 
+function fahrenheitToCelsius(fahrenheitTemp) {
+    let celsiusTemp = ((fahrenheitTemp - 32) / (9/5));
+    return (`${fahrenheitTemp}°F is ${celsiusTemp}°C.`);
+}
+console.log(fahrenheitToCelsius(65));
 
 /******************
 Temperature Converter Celsius to Fahrenheit
@@ -86,6 +109,11 @@ Store a celsius temperature into a variable.
 Convert it to fahrenheit and output "NN°C is NN°F".
 ******************/
 
+function celsiusToFahrenheit(celsiusTemp) {
+    let fahrenheitTemp = ((celsiusTemp * (9/5)) + 32);
+    return (`${celsiusTemp}°C is ${fahrenheitTemp}°F.`);
+}
+console.log(celsiusToFahrenheit(18.33));
 
 /******************
 Is it the weekend?
@@ -116,6 +144,17 @@ The absolute value of a negative number is the positive version of that same num
 and the absolute value of a positive number (or zero) is that number itself.
 ******************/
 
+function absolute(aNumber){
+    if (aNumber >= 0) {
+        return aNumber;
+    } else {
+        return (aNumber * -1);
+    }
+}
+
+console.log(absolute(321));
+console.log(absolute(-321));
+console.log(absolute(0));
 
 /******************
 Create a function that counts the number of characters in your name
@@ -128,4 +167,15 @@ return the number of characters in the string
 call function 'countChars'
 ******************/
 
+function countChars(nameString) {
+    // return toString(nameString)
+    if (typeof(nameString) != "string") {
+        return ((String(nameString)).length);
+    } else {
+        return ((nameString).length);
+    }
+}
 
+console.log(countChars("Vincent"));
+console.log(countChars(123456));
+console.log(typeof(String))

pset4_scope.js

@@ -69,12 +69,12 @@
     const foo = 1;
     function run() {
         const foo = 2;
-        console.log(foo); // what is foo? why?
+        console.log(foo); // what is foo? why? ### foo is 2 because it is declared in a new context
     }
 
-    console.log(foo); // what is foo? why?
+    console.log(foo); // what is foo? why? ### foo is 1 because foo is declared as 1 in the global environment
     run();
-    console.log(foo); // what is foo? why?
+    console.log(foo); // what is foo? why? ### foo is still 1 because the 'foo' in the 'run' function environment is destroyed
 */
 
 
@@ -92,7 +92,7 @@
     }
 
     run();
-    console.log(foo); // what is foo? why?
+    console.log(foo); // what is foo? why? ### foo is undefined as it was only declared in the run() function environment
 */
 
 /*
@@ -102,15 +102,15 @@
 
     const foo = 1;
     function run() {
-        const foo = 2;
+        const foo = 2; 
         function _inner() {
-            console.log(foo); // what is foo? why?
+            console.log(foo); // what is foo? why? ### foo is 2. function _inner() looks at the environment above it for a reference to 'foo'
         }
         _inner();
     }
 
     run();
-    console.log(foo); // what is foo? why?
+    console.log(foo); // what is foo? why? ### foo is 1. the declared "foo" in the function run() environment is destroyed
 */
 
 /*
@@ -122,13 +122,13 @@
     function run() {
         foo = 2;
         function _inner() {
-            console.log(foo); // what is foo? why?
+            console.log(foo); // what is foo? why? ### foo is 2. foo is declared in the global environment and subsequently redefined in the run() function environment. function _inner is able to check the value of foo in the global context
         }
         _inner();
     }
 
     run();
-    console.log(foo); // what is foo? why?
+    console.log(foo); // what is foo? why? foo is 2. see above
 */
 
 /*
@@ -141,13 +141,13 @@
         const foo = 2;
         function _inner() {
             const foo = 3;
-            console.log(foo); // what is foo? why?
+            console.log(foo); // what is foo? why? foo is 3 because foo has been defined in the _inner() function environment as  3, and then console.log() function is called in the same environment
         }
         _inner();
     }
 
     run();
-    console.log(foo); // what is foo? why?
+    console.log(foo); // what is foo? why? ### foo is 1. it is defined in the global environment as 1 and any declarations within inner functions have no bearing on it's value
 */
 
 /*
@@ -158,14 +158,14 @@
     let foo = 1;
     function run() {
         function _inner() {
-            console.log(foo); // what is foo? why?
+            console.log(foo); // what is foo? why? ### foo is 1 because it was declared in the global environment as 1. Another "foo" variable was not declared elsewhere
             foo = 10;
         }
         _inner();
     }
 
     run();
-    console.log(foo); // what is foo? why?
+    console.log(foo); // what is foo? why? ### foo is 10 because a value of 10 was reassigned to it in function _inner(). foo was not declared in any other environments
 */
 
 /*
@@ -190,19 +190,40 @@
 
     Given the following code:
 
-    let foo = 1;
-    function run( anotherFunctionToCall ) {
-        const foo = 9;
-        anotherFunctionToCall();
-        console.log(foo)
-    }
-
-    run(function() {
-        foo = 2;
-    });
-    console.log(foo); // what is foo? why?
+    // let foo = 1;
+    // function run( anotherFunctionToCall ) {
+
+    //     anotherFunctionToCall();
+    //     console.log(foo)
+    // }
+
+    // run(function() {
+    //     foo = 2;
+    // });
+    // console.log(foo); // what is foo? why?
 */
+// let foo = 1;
+//     function run( anotherFunctionToCall ) {
+//         const foo = 9;
+//         anotherFunctionToCall();
+//         console.log(foo)
+//     }
+
+//     run(function() {
+//         foo = 2;
+//     });
+//     console.log(foo); // what is foo? why?
+
+// let b = 3
+//     function whatever(){
+//         let a = 1
+//         function hey(){
+//            b = a * b
+//        } 
+//     }
 
+// whatever()
+// console.log(b);
 /*
     PROBLEM 12:
 
@@ -213,15 +234,48 @@
         foo = 9;
         anotherFunctionToCall();
         console.log(foo)
+    }ROBLEM 11:
+
+    Given the following code:
+
+    let foo = 1;
+    function run( anotherFunctionToCall ) {
+        const foo = 9;
+        anotherFunctionToCall();
+        console.log(foo)
     }
 
+
+
     run(function() {
         foo = 2;
     });
     console.log(foo); // what is foo? why?
 */
 
+// let foo = 1;
+//     function run( anotherFunctionToCall ) {
+//         foo = 9;
+//         anotherFunctionToCall();
+//         console.log(foo)
+//     }
+
+//     run(function() {
+//         foo = 2;
+//     });
+//     console.log(foo); // what is foo? why?
+
+let foo = 1;
+function run( anotherFunctionToCall ) {
+    const foo = 9
+    anotherFunctionToCall();
+    console.log(foo)
+}
 
+run(function() {
+    foo = 2;
+});
+console.log(foo); // what is foo? why?
 
 
 

pset5_declarations_vs_expressions.js

@@ -14,6 +14,22 @@
         return the remainder of the sum of a,b,c divided by 3
 */ 
 
+function prob1_decl(a,b,c){
+    return (a + b + c) % 3;
+}
+console.log(prob1_decl(1,2,4));
+
+
+const prob1_named = function prob1_named(a,b,c){
+    return (a + b + c) % 3;
+}
+console.log(prob1_named(1,2,4));
+
+
+const prob1_fat = (a,b,c) => {
+    return (a + b + c) % 3;
+}
+console.log(prob1_fat(1,2,4));
 
 /*
     PROBLEM 2:
@@ -24,9 +40,47 @@
         then function will return 'one-two-three'
 */
 
+function prob2_decl(a,b,c){
+//  return (a+"-"+b+"-"+c);
+    return (`${a}-${b}-${c}`)
+}
+console.log(prob2_decl('one', 'two', 'three'));
+
+
+const prob2_named = function prob2_named(a,b,c){
+    return (`${a}-${b}-${c}`)
+}
+console.log(prob2_named('one', 'two', 'three'));
+
+
+const prob2_fat = (a,b,c) =>{
+    return (`${a}-${b}-${c}`)
+}
+console.log(prob2_fat('one', 'two', 'three'));
+
 /*
     PROBLEM 3:
         Write a function that takes NO params
         return a random number between 0 and 10 
         (doesn't have to be a whole number tho)
 */
+
+function prob3_decl(){
+    randomNum = Math.random();
+    return randomNum * 10;
+}
+console.log(prob3_decl());
+
+
+const prob3_named = function prob3_named(){
+    randomNum = Math.random();
+    return randomNum * 10;
+}
+console.log(prob3_named());
+
+
+const prob3_fat = () => {
+    randomNum = Math.random();
+    return randomNum * 10;
+}
+console.log(prob3_fat());