is there a way to remove leading and trailing zero in javascript without using regex?-CodePudding

There's so many example in the web, about removing trailing and leading zeros. but all of them are using regex.

sample.toString().replace(/^0 /,'').replace(/0 $/,'');

is there a way to removed them without using regex? because regex is prone to ddos,

base on sonarqube.

https://rules.sonarsource.com/javascript/RSPEC-5852

CodePudding user response：

If you don't use regex, then you will have to iterate the string character by character from both ends. Actually, if you use a regex alternation it is a good and concise option:

sample.toString().replace(/^0 |0 $/g, "");

CodePudding user response：

Maybe there is a better solution, but i came with this :

const test = "0032540140043000";
const removeTrailingZeros = (str) => {
  let result = `${ str}`;
  while (result.at(-1) === "0") {
    result = result.slice(0, -1);
  }
  return result;
};
console.log(removeTrailingZeros(test)); // 32540140043

Explanation : str remove the leading "0" when parsing a string to a number, because JS prefers 123 than 0123. Then, a little loop to remove the trailing "0" on this string. Then, return the string.