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Daily Challenge #305 - Remove Anchors from URLs

dev.to staff on November 10, 2020

Complete the function/method so that it returns the url with anything after the anchor (#) removed. Examples remove_url_anchor('dev.to#...
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cipharius profile image
Valts Liepiņš •

Haskell:

remove_url_anchor :: String -> String remove_url_anchor = takeWhile (/= '#')
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Alfredo Salzillo •

So much beautiful to read.

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peter279k •

Here is the simple solution with parse_url function in PHP:

function replaceAll($string) { $parsed = parse_url($string); $scheme = $parsed['scheme'] ?? false; if ($scheme !== false) { return $scheme . '://' . $parsed['host']; } return $parsed['path']; }
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Calin Baenen • • Edited

Java:

class URL { private String url = null; public URL(String url) {this.url = url;} // The url. public String removeAnchor() { if(url != null) return url.split("#")[0]; // Get the part before the anchor. return ""; } }
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DanielT404 •

C# solution 

class MainClass { public static string remove_url_anchor(string url) { int anchorFoundAt = url.IndexOf("#", 0, url.Length); if(anchorFoundAt == -1) return url; return url.Substring(0, anchorFoundAt); } public static void Main (string[] args) { string url = remove_url_anchor("dev.to#about"); Console.WriteLine(url); } }
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Mihail Malo • • Edited

JavaScript 

const remove_url_anchor = url => url.split('#', 1)[0]
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Second parameter to split means it will stop looking after the first match, and never construct a second string value.

Rust 

#![feature(str_split_once)] fn remove_url_anchor(url: &str) -> &str { url.split_once('#').map_or(url, |(x, _)| x) }
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look at it go!

Disclaimer:

In real life, please use developer.mozilla.org/docs/Web/API... or docs.rs/url/ respectively.

These should be fairly bulletproof though, since URL specification doesn't allow unencoded # character anywhere, including notably the <password> section of <protocol>://<user>:<password>@<host>. But where there's fragment, soon will come other parts of the URL.

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mellen profile image
Matt Ellen-Tsivintzeli • • Edited

REGEX to the rescue.

function remove_url_anchor(url) { return url.replace(/([^#]*)#.+/, '$1'); }
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Sabin Pandelovitch •

js using split method

const remove_url_anchor = url => url.split('#')[0];
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Jehiel Martinez •

JS

removeUrlAnchor = (str) => str.split('#')[0];
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rafi993 profile image
Rafi •

SQL (postgres)

SELECT split_part('dev.to#about', '#', 1);
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Boris Quiroz •

Python:

def remove_url_anchor(str): print(str.split("#")[0])
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Annshuk Sharma •

const remove_url_anchor =(url) => url && url.split('#')[0];

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Arepo Desir •

Ha! I love the English like precision in syntax.