使用带有引用和匹配到数组的变量

Question

Hello I have an input that validates if a string is unique. I have an array of already current values to check against. If the user inputs in all capitals I want it to still match as long as it's exact. I tried doing a new regex constructor but there is no flag for returning only exact matches.

Here is what I have which returns dog and doggy. I just want dog.

let myarray = [‘dog’ , ‘doggy’, ‘cat’]

let value = ‘dog’

let reg = new RegExp(value, 'i');


let tag = myarray.filter(function (str) { return reg.test(str); });

Answer 1

To find an exact word, add the matches beginning ( ^ sign) before the value, and matches end ( $ sign) after the value:

 const myarray = ['dog', 'doggy', 'cat'] const value = 'dog' const reg = new RegExp(`^${value}$`, 'i'); const tag = myarray.filter((str) => reg.test(str)); console.log(tag);