7 Questions
What is the purpose of the select-columns function?
To create a new table with certain columns from an existing table
How can the tickcount column be extracted from a table?
Using the get-column function.
What is an extracted column?
A basic kind of datum called a list.
What is a list in Pyret?
A collection of elements with the same type and order.
What is an anonymous list?
A list with no column name
What is a literal list in Pyret?
A list created directly using [list: ].
What can be done with lists in Pyret?
They can be interpreted differently in different contexts.
Study Notes
- The select-columns function produces a new table with certain columns from an existing table.
- The tickcount column can be extracted using the get-column function.
- An extracted column is a more basic kind of datum called a list.
- A list has an order and all elements are expected to have the same type.
- A list does not have a column name and is anonymous.
- Lists can be used in several different contexts and can be interpreted differently.
- Literal lists can be created directly using [list: ].
- An empty list can be created using [list: ].
- Pyret provides built-in operations on lists of numbers.
- Useful functions can be included by including libraries.
Test your knowledge of Pyret's list-related functions and operations with this informative quiz. Learn about the select-columns function, the tickcount column, and how to extract columns from tables. Discover the characteristics of lists, how they can be created and manipulated, and the different contexts in which they can be used. Expand your Pyret knowledge with this engaging quiz.
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