London | 26-ITP-May | Anita Amirhaeri | Sprint 1 | Structuring-and-Testing-Data

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,4 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+// Line 3 is adding 1 to that value of count variable, then making that new value to be the current count variable.

Sprint-1/1-key-exercises/2-initials.js

@@ -5,7 +5,7 @@ let lastName = "Johnson";
 // Declare a variable called initials that stores the first character of each string.
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
-let initials = ``;
+let initials = firstName[0] + middleName[0] + lastName[0];
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

Sprint-1/1-key-exercises/3-paths.js

@@ -17,7 +17,7 @@ console.log(`The base part of ${filePath} is ${base}`);
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+const dir = filePath.slice (0,lastSlashIndex +1);
+const ext = filePath.slice (filePath.lastIndexOf ("."));
 
-// https://www.google.com/search?q=slice+mdn
+// https://www.google.com/search?q=slice+mdn

Sprint-1/1-key-exercises/4-random.js

@@ -2,8 +2,13 @@ const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
-
+console.log (num);
 // In this exercise, you will need to work out what num represents?
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
+
+// Math.random() : Generates a pseudorandom decimal number.  [0, 1)
+// Math.random() * (maximum - minimum + 1) : Scales the random value so its width equals the number of integers from `minimum` to `maximum`. [0, maximum - minimum + 1)                                                   
+// Math.floor(Math.random() * (maximum - minimum + 1)) : Floors the scaled value, producing a random integer starting at 0. Integers in [0, maximum - minimum + 1), i.e. {0, 1, ..., maximum - minimum}
+// Math.floor(Math.random() * (maximum - minimum + 1)) + minimum` : Shifts the previous result upward by `minimum`, producing a random integer between `minimum` and `maximum`, inclusive. Integers in [minimum, maximum + 1), i.e. {minimum, minimum + 1, ..., maximum}

Sprint-1/2-mandatory-errors/0.js

@@ -1,2 +1,4 @@
+/*
 This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
+We don't want the computer to run these 2 lines - how can we solve this problem?
+*/

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -20,3 +20,13 @@ console.log(`The percentage change is ${percentageChange}`);
 // d) Identify all the lines that are variable declarations
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+
+/*    
+a) There are 5 calls made:
+    carPrice = Number(carPrice.replaceAll(",", ""));
+    priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""))
+b) Error on line 5 for "," it is missing the seperating , between arguments.
+c) 4 and 5
+d) 1 and 2, 7 and 8,
+e) It removes the , from the string and replaces it with nothing. Used to help change the string into a number with the "Number" function.
+*/

Sprint-1/3-mandatory-interpret/2-time-format.js

@@ -23,3 +23,12 @@ console.log(result);
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+/*
+a) There are 6: movieLength, remainingSeconds, totalMinutes, remainingMinutes, totalHours, result.
+b) There is one: console.log.
+c) It is taking the movieLength and doing a remainder that is showing what is left after the vaule has been divided, in this case wil be 84.
+    I found the info here https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Remainder 
+d) It is removing any extra seconds from the division by 60 so that is is showing as whole numbers without decimals.
+e) Result is showing the movies duration but broken down to hours:minutes:seconds, I think it should be movieDuration to help describe it better.
+f) Yes, it does work to show the lenght even if it is only in one section, though it does show values of 0, could clean it up to show nothing.
+*/

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -25,3 +25,11 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+/*
+3-6. It is taking the vaule from pencestring and using substring to return part of the string, by -1 so from the end resualting in "399"
+8. It is now adding "0" infront of vaule if the vaule is under 3 characters in size.
+9-12. Using the substring function to reduce the size of the vaule to just 2 characters.
+14-16. Taking the value from paddedPenceNumberString and this time with substring, only showing the last 2 characters in teh value.
+       Then with using .padEnd it ensures that 2 characters are shown with 0 being there is nothing is there.
+18. howing the resualt of the code starting with a "£" then the value of "pounds" then a "." and lastly value of "pence"
+*/