RegexpGarden

1234

let garden = [

	"Rue", "Rose", "Rosemary",

	"Rye", "Rice", "Primrose"

];

123456

for  (const plant of garden) {

if (plant.match(//i) {

fertilize(plant);

Lesson 22 / 42

Lesson task •

Fertilize plants which names consist of exactly 4 letters

Exactly N times

Repeats the previous token exactly N times

Instead of duplicating the same token several times, you can follow it with the custom quantifier: \d\d\d equals to \d{3}

Possible use-case: match all the numbers which are greater than 99:

123456

console.log(!!"98".match(/\d{3}/)) // false

console.log(!!"99".match(/\d{3}/)) // false

console.log(!!"100".match(/\d{3}/)) // true

console.log(!!"999".match(/\d{3}/)) // true

console.log(!!"1000".match(/\d{3}/)) // true

console.log(!!"1000000".match(/\d{3}/)) // true

As usual, if you need to match "{" or "}" literally, consider escaping it with the backslash:

console.log(!!"{".match(/\{/)) // true

console.log(!!"}".match(/\}/)) // true