meet it

Ask an array whether it holds something.

asks an array a yes-or-no question: is this item in you? temps.includes(19) gives true if 19 is there, and false if not.

goes further and tells you where it is. It gives the index of the first match, or -1 when there is no match, because no real index is below 0.

gives the bigger number, 9, and Math.min gives the smaller. Use one in a loop to find the warmest day: keep the best so far, and let each item challenge it.

let temps: number[] = [14, 19, 11, 17];
console.log(temps.includes(19));
console.log(temps.indexOf(11));
console.log(temps.indexOf(30));
console.log(Math.max(4, 9), Math.min(4, 9));

.includes() and .indexOf() look for an exact match, so "Ava" and "ava" are different.

guess first

Hunting for the warmest day. What will it show?

Guess before you run it. Wrong guesses are how you learn, and nothing is marked.

let temps: number[] = [14, 19, 11, 17];
let warmest: number = temps[0];
for (const temp of temps) {
  warmest = Math.max(warmest, temp);
}
console.log(warmest);

your turn

Your turn. Get on the guest list.

Push your name onto the guest list in the first blank. Then check for the same name in the second blank, spelled exactly the same, and press run.

Your code

press run to see what happens

fix it

The coldest day was 0? Fix the search!

Broken code to fix

press run to see what happens

It says 0, but 0 is not even in the array. Where does 0 come from?
coldest starts at 0, and no temperature here is colder than that, so it never changes.
Start with the first item instead: let coldest: number = temps[0]; then press run.

nailed it

you can search any array now. :D

.includes() says whether an item is in the array.
.indexOf() gives its index, or -1 if it is missing.
Start the best so far at the first item, not 0.

new words in your collection

includes
indexOf
Math.max

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