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| # | Exercise Title | Features | Description | Platform | Keywords |
|---|---|---|---|---|---|
| 1 | Given a string, find the first integer inside and return its value as an integer. | Code Completion | Given a string, find the first integer inside and return its value as an integer. Return 0 if there is... | CodeCheck | Strings, Numbers in Strings |
| 2 | Given a string, find the sum of all integers inside. | Code Completion | Given a string, find the sum of all integers inside. Return 0 if there is no integer inside. | CodeCheck | Strings, Numbers in Strings |
| 3 | Given a string, find all integers inside and return a string that separates them by commas. | Code Completion | Given a string, find all integers inside and return a string that separates them by commas. | CodeCheck | Strings, Numbers in Strings |
| 4 | Concatenating Strings and Numbers (Case 1) | Construct a program that uses variables x, y, and z to print "Python was invented in 1989.". | PCEX | ||
| 5 | CFG Exercise: a's and b's are equal | Grammar Construction Exercise | User creates a CFG that generates strings in the language where the number of a's and b's is equal. | OpenDSA | Context-Free Grammar |
| 6 | Counting the Occurrences of One String in Another (Case 1) | Construct a program that has a function that receives a string and returns the number of times that the string... | PCEX | ||
| 7 | Counting the Occurrences of One String in Another (Case 2) | Construct a program that has a function that receives a string and returns the number of times that the string... | PCEX | ||
| 8 | Counting the Occurrences of One String in Another (Case 1) | Construct a program that has a function that receives a string and returns the number of times that the string... | PCEX | ||
| 9 | Counting the Occurrences of One String in Another (Case 2). | Construct a program that has a function that receives a string and returns the number of times that the string... | PCEX | ||
| 10 | Number of vowels | Write a program that counts how many vowels there are in a string (each one separately). | PCEX | ||
| 11 | Determining Number of Parse Tree Nodes Exercise: Alternate | Calculation Exercise, Battery | User determines the number of nodes in a parse tree generated by a given string on a given grammar. Alternative... | OpenDSA | Context-Free Grammar, Parse Tree |
| 12 | Determining Number of Parse Tree Nodes Exercise | Calculation Exercise | User determines the number of nodes in a parse tree generated by a given string on a given grammar. | OpenDSA | Context-Free Grammar, Parse Tree |
| 13 | On a chessboard, positions are marked with a letter between a and h for the column and a number between 1 and 8 for the row. | Code Completion | On a chessboard, positions are marked with a letter between a and h for the column and a number between... | CodeCheck | Branches, Branches Without Functions |