IB Computer Science 1

Wednesday (3/6/19)

Warmup:

• Write a function named isDigit(ch) that returns True if the string ch is a digit character, and False otherwise
• Submit your solution to the repl.it for warmup credit

Agenda:

• Date Format Validation cont'd
  • If you have not completed Date Format Validation already, then you can use isDigit() to help you
• Complete E-mail Harvester
• E-mail Harvester Challenges:
  • Modify e-mail harvester so that it reads from a file
  • Modify e-mail harvester so that multiple e-mails can be found/printed
  • Test the file reading, multiple e-mail harvester by processing the HTML from some website

Monday (3/4/19)

Agenda:

• Confirm that you have completed and submitted the Count Vowels and Count Words repl.its
• Date Format Validation repl.it (no loops)
  1. You will define a function named checkDateFormat(dateStr) that takes a string as a parameter. Your function will return True if the date string is valid, and False otherwise
  2. A date string is valid if it adheres to the following rules:
     1. Must be in the format: MM/DD/YYYY
     2. MM must be a valid 2-digit month (01 -> 12)
     3. DD must be a valid 2-digit day (01 -> 31)
     4. YYYY must be a 4-digit number
  3. Guidance: You should use any and/or all programming strategies to help you define the function: checking the string length, string slicing, checking if specific characters are valid, defining helper functions, etc..
  4. Submit to repl.it
• E-mail Harvester repl.it
  1. You will define a function named harvestEmail(s) that takes a string as a parameter. Your function will return the e-mail address within the string s
  2. Assume that the s parameter will have an e-mail address and all e-mail addresses have an @ symbol
  3. Use a loop to find the index of the @ symbol. Basically, check if each character is the @ symbol, and if it is, then remember the current index. Be sure to break out of the loop when you find the @ symbol
  4. Use a loop to find the index of the space " " character before the @ symbol (this is the beginning of the e-mail address). Hint: Start your loop counter at the index of the @ symbol, and count backwards/downwards. Be sure to break out of the loop when you find the space
  5. Use a loop to find the index of the space " " character after the @ symbol (this is the end of the e-mail address). Hint: Start your loop counter at the index of the @ symbol. Be sure to break out of the loop when you find the space
  6. Return the e-mail address by string slicing the indices of the beginning and end of the e-mail address
  7. Submit to repl.it
• Challenges:
  • Modify e-mail harvester so that it reads from a file
  • Modify e-mail harvester so that multiple e-mails can be found/printed
  • Test the file reading, multiple e-mail harvester by processing the HTML from some website

Archives

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• IBCS1 - 1718