Javascript / Node JS - 使用正则表达式转换字符串？

Question

In my nodeJs code I make a REST call to a 3rd party api and one of the values in the response is a string value eg:

  "total": "-15"

Note that this value can either be a negative number, zero or a positive number, but as a string.

eg:

   "total": "-5"
   "total": "0"
   "total": "+3"

How can I convert this value to be as follows? Based off the above example:

   5 under
   level par
   3 over

I am quite new to node/javascript - is regex the best option to do this?

Answer 1

As Blunt Jackson said, regex will probably be slower. Here is a conversion function example:

 const toText = (value) => { const parsed = parseInt(value) return parsed > 0? `${parsed} over`: parsed < 0? `${Math.abs(parsed)} under`: 'level par'; } console.log(toText("-5")); console.log(toText("0")); console.log(toText("+3"));

Answer 2

I like this question because I like Code Golf:D

So my suggestion would be this one-liner:

const toText = v => v == 0 ? "level par" : v < 0 ? `${-v} under` : `${+v} over`;

console.log(toText("-5"));
console.log(toText("0"));
console.log(toText("+3"));

Works with Numbers or Strings as parameter.