How use the RegExp to filter IP address in js All In One

How use the RegExp to filter IP address in js All In One

如何使用 RegExp 在 js 中过滤 IP 地址

192.168.18.1 < 192.168.18.N < 192.168.18.255

ignore IPs: 192.168.18.0 / 192.168.18.1 / 192.168.18.255

error

function test(n) {
  let reg = /192\.168\.(1?[0-9][0-9]|2[0-5][0-5])\.(1?[0-9]?[1-9]|2[0-4][0-9]|25[0-4])/;
   for (let i = 0; i < n; i++) {
     let result = reg.test(`192.168.18.${i}`);
     if(result) {
       // console.log(`192.168.18.${i} ✅`, i, result)
     } else {
       console.log(`192.168.18.${i} ❌`, i, result)
     }
   }
}

test(256);
// 192.168.18.0 ❌ 0 false

reg = /192\.168\.(25[0-4]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[2-9])/;

reg.test(`192.168.0`);
false
reg.test(`192.168.1`);
false
reg.test(`192.168.2`);
true
reg.test(`192.168.254`);
true
reg.test(`192.168.255`);
true

solution

$ for end ✅

reg = /192\.168\.(25[0-4]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[2-9])$/;

reg.test(`192.168.0`);
false
reg.test(`192.168.1`);
false
reg.test(`192.168.2`);
true
reg.test(`192.168.254`);
true
reg.test(`192.168.255`);
true

Regexper

https://regexper.com/

#  no end ❌
reg = /192\.168\.(1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.([2-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])/;

# `$` end ✅
reg = /192\.168\.(1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.([2-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])$/;

demos

function test(n) {
  let reg = /192\.168\.(1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.([2-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-4])$/;
   for (let i = 0; i < n; i++) {
     let result = reg.test(`192.168.18.${i}`);
     if(result) {
       // console.log(`192.168.18.${i} ✅`, i, result)
     } else {
       console.log(`192.168.18.${i} ❌`, i, result)
     }
   }
}

test(256);

192.168.18.0 ❌ 0 false
192.168.18.1 ❌ 1 false
192.168.18.255 ❌ 255 false

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MDN

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp

https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/RegExp

shell script

How to use Linux shell command filter the IP address All In One

如何使用 Linux shell 命令过滤 IP 地址

https://www.cnblogs.com/xgqfrms/p/17324587.html

refs

https://stackoverflow.com/a/16321775/5934465

https://www.cnblogs.com/xgqfrms/p/17324587.html#5168455

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