reduce. It also introduced
console.log when there’s a whole lot more they could do and learn using their browser’s console.
As far as the exercise itself, I found it pretty straight-forward and simple, but I use these concepts and functions on a regular basis across a number of languages. There was one part about figuring out the boulevards in France that contain “de” which involved running some code in the console on a Wikipedia page, but that ended up being something you could “one-liner” as well. It seemed slightly out of place with the other exercises, but it combined a couple of concepts - the
document.querySelectorAll from previous days, along with a
map and a
I did the exercises (except the Wikipedia one) on my own before watching the whole video. In most cases, what I came up with was either exactly what Wes showed, or the story was same, but the variable names were changed to protect the innocent. There were a few that we did differently though, and I’m now not sure if the way I did mine would end up with problems that I couldn’t think of. Specifically, there’s one with an array of strings representing people, and the strings are essentially
Last name, First name of a bunch of celebrity names. The exercise is to sort the list alphabetically by last name. I just sorted it in the format it was given, while Wes broke the string into last and first name by splitting the string on the
,. I’m not sure if what I did would run into an issue under some circumstances, but if you think of a case where it would be wrong, I’d really like to know about it.
Other ones I did differently, there’s some that wanted you to sort a bunch of inventors based on how long they had lived. In Wes’ solution, he calculates the ages and then used a ternary to return either -1 or 1 based on which value was larger. For mine, I calculated the ages, but I just returned the value of subtracting the two which I think is still legitimate because I don’t think
sort needs to have only
-1 values returned. I’m not sure one or the other is more readable, but I’m not the biggest fan of ternaries in a lot of cases. For simple sorts though, I’ve got no issue.
That’s about all I’ve got to say about Day 4. On to Day 5!