CODEWITHSUNDEEP
javascript
Sai Darshan
Sai Darshan

Reputation: 387

Extracting certain substring from a string

I want to extract the last part of this string : "https://steamcommunity.com/profiles/76561198364464404".Just the numbers after '/profiles'.But the problem is the URL can change sometimes.

There are two types of url

1.First one is "https://steamcommunity.com/profiles/76561198364464404" with "/profiles" and then the "id"(id is the numbers after '/profiles').

2."https://steamcommunity.com/id/purotexnuk".Second is this type.Where "/profiles" doesn't exist.

I have come up this code :

let inc;
const index = 27;
const string = 'https://steamcommunity.com/id/purotexnuk';
if (string.includes('profiles')) {
    inc = 9;
} else {
    inc = 3;
}

console.log(string.slice(index + inc, -1));

The above code checks wheather the string "/profiles" is present.If the string contains "/profiles".inc will be 9.So that slice starts from the right side of the string(url) and ends at the first '/' from the right.inc is 9 becuase "profiles/" length is 9.Similar way if the string(url) contains "id".The slice will start from the end and stop at the first '/' from the right.inc will be 3 becuase "id/" length is 3.

The index is always constant because ,"/profiles" or "/id" only occurs after "https://steamcommunity.com" whose length is 27.Is there any better way i can extract only the profile id or profile name?

(profile id - 76561198364464404)

(profile name - purotexnuk )

Upvotes: 0

Views: 45

Answers (3)

Shub
Shub

Reputation: 2704

You can use regex for this, it will also take care if your url ends with / or has query parameters example https://steamcommunity.com/id/purotexnuk?ref=abc

/.*(?:profiles|id)\/([a-z0-9]+)[\/?]?/i

example:

const regex = /.*(?:profiles|id)\/([a-z0-9]+)[\/?]?/i;
const matches = regex.exec('https://steamcommunity.com/id/purotexnuk');
console.log(matches[1]);

Upvotes: 1

Shri
Shri

Reputation: 752

Or do it in one line:

const string = 'https://steamcommunity.com/id/purotexnuk';
console.log(string.slice(string.lastIndexOf("/") + 1, string.length));

Upvotes: 0

brk
brk

Reputation: 50291

You can split the string with delimiter / and return the last value value from the array;

function getNum(str) {
  const arr = str.split('/');
  if (!isNaN(arr[arr.length - 1])) {
    return arr[arr.length - 1];
  }
  return ' no number ';
}

const st1 = "https://steamcommunity.com/profiles/76561198364464404";
const st2 = "https://steamcommunity.com/profiles/76561198364464404";
const st3 = "https://steamcommunity.com/id/purotexnuk";

console.log(getNum(st1));
console.log(getNum(st2));
console.log(getNum(st3));

Upvotes: 1

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