4.5 Meeting Videos
4.5.6 Cohort 6
Meeting chat log
00:36:02 Arthur Shaw: TIL that the subset operator has parameters. Thanks, Trevin!
00:38:55 Vaibhav Janve: its interesting that carriage "a" has two set of wheels instread of 4. I wonder that choice is because its atomic.
00:40:44 Arthur Shaw: @Vaibhav, because the load is lighter, the carriage needs fewer axles? ;) I agree: it's a confusing graphical choice.
00:41:11 Vaibhav Janve: lol
01:05:53 Vaibhav Janve: Thank you Trevin!4.5.7 Cohort 7
Meeting chat log
00:40:18 Ryan Honomichl: What type of vector does each of the following calls to ifelse() return?
* "ifelse returns a value with the same shape as test which is filled with elements selected from either yes or no depending on whether the element of test is TRUE or FALSE."
00:42:11 Ryan Honomichl: "I recommend assigning the results of an if statement only when the entire expression fits on one line; otherwise it tends to be hard to read"
00:42:46 Ryan Honomichl: * When you use the single argument form without an `else` statement, `if` invisibly returns NULL if the condition is FALSE.
- Since functions like c() and paste() drop NULL inputs, this allows for a compact expression of certain idioms
00:54:15 collinberke: https://docs.google.com/spreadsheets/d/1ScrbEw_-vB9DruaJhjtVY8HLQmuNPqyWeOOjmG6OY1M/edit?usp=sharing
00:58:46 collinberke: https://www.youtube.com/@safe4democracy/videos