How can I extract each integer or float (positive or negative) from a string in js

Question

This is my code. It still returns null and I do not know why!

var tName = "18.56x^2   -   5.45x  -3.78";
abc = tName.replace(/x/g, "").replace("^2", "").replace(/\s/g, "");
console.log(abc);

$re = "/-?\\d+(?:\\.\\d+)?/m";
$str = abc.toString();
console.log($str.match($re));

Answer 1

You need to

• not quote the regex AND
• not escape the \d AND
• add the global flag

Have a try with this

const $re = /-?\d+(?:\.\d+)?/mg,
      tName = "18.56x^2   -   5.45x  -3.78",
      abc = tName.replace(/x/g, "").replace("^2", "").replace(/\s/g, ""),
      nums = [...abc.matchAll($re)].map(m => m[0]);
console.log(abc)
console.log(nums)