charAt()

slice()
Math.floor()
Math.random()
lastIndexOf()
replaceAll()

Author: Della-Bella

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

@@ -8,20 +8,22 @@
 // └──────┴──────────────┴──────┴─────┘
 
 // (All spaces in the "" line should be ignored. They are purely for formatting.)
-
+                  //home / user /dir /                          file.txt; 
 const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
-const lastSlashIndex = filePath.lastIndexOf("/");
+const lastSlashIndex = filePath.lastIndexOf("/"); //=index 47 /
 const base = filePath.slice(lastSlashIndex + 1);
 console.log(`The base part of ${filePath} is ${base}`);
 
 
 
 // Create a variable to store the dir part of the filePath variable
-const dir = filePath.slice(1,5);
-console.log(dir);
+const dir = filePath.slice(0, lastSlashIndex + 1);
+console.log(`The directory part is: ${dir}`);
 
 // Create a variable to store the ext part of the variable
-
+const lastDotIndex = filePath.lastIndexOf("."); // look for the last Dot
+const extPart = filePath.slice(lastDotIndex + 1); 
+console.log(`The extension part is: ${extPart}`); 
 
 // https://www.google.com/search?q=slice+mdn
 

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

@@ -2,8 +2,20 @@ 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?
+
+//Num represents a random number between 1 to 100 inclde both becasue we are adding 1
+
 // Try breaking down the expression and using documentation to explain what it means
+
+//(maximum - minimum + 1) = get maximum number 100 extract the minimum 1 add +1 to incluide 100.
+//+ minimum add 1
+
+//math.radom = gets randm number between 0 and 1 but never 1 so we add +1 to incluide 1
+//Math.floor= will raounds donw to the nearest whole number
+
+
 // 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

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

@@ -1,2 +1,3 @@
-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?
+//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?
+//coment the lines

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

@@ -1,4 +1,7 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
+let age = 33;
 age = age + 1;
+console.log (age);
+
+// error if we intend to change the value assing to a variable we need to use "LET"

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

@@ -1,5 +1,8 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
 
-console.log(`I was born in ${cityOfBirth}`);
+
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+
+// Error trying to use the variable "cityOfBirth"before declare it 

Sprint-1/2-mandatory-errors/3.js

@@ -1,9 +1,18 @@
-const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+//const cardNumber = 4533787178994213;
+//const last4Digits = cardNumber.slice(-4);
 
 // The last4Digits variable should store the last 4 digits of cardNumber
 // However, the code isn't working
 // Before running the code, make and explain a prediction about why the code won't work
 // Then run the code and see what error it gives.
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+
+// it will not work becase Slice is a string methodo. 
+// To work here need to convert the number to string 
+
+const cardNumber = 4533787178994213;
+const last4Digits = cardNumber.toString().slice(-4);
+
+console.log(last4Digits);

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,9 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+// const 12HourClockTime = "20:53";
+// const 24hourClockTime = "08:53";
+
+const hour12ClockTime = "20:53";
+const hour24ClockTime = "08:53";
+
+console.log(hour12ClockTime,hour24ClockTime);
+
+// variable names  can't start with nunmbers