Daily Challenge #46 - ???

Today's challenge requires you to write a function which removes all question marks from a given string.

For example: hello? would be hello

---

This challenge comes from aikedaa here on DEV.

Want to propose a challenge idea for a future post? Email [e-mail] with your suggestions!

Comments

[Matt Ellen]

(javascript)

function noMoreQM(input)
{
  return input.replace(/\?/g, '');
}

Uses a simple regular expressions with the global (g) modifier to find all the ? (this needs to be escaped in a regular expression, so \?) and replace them with the empty string ''.

[George]

Javascript:

const removeQuestionMark = string => string.replace(/\?/g, '')

Called as:

removeQuestionMark('Will this work???') // yes

Important to note, this will also remove the first escape characters (\) and output newlines in template literals as \n

[Ben Halpern]

Ruby

def no_more_questions(string)
  string.gsub("?", "")
end

[Amin]

JavaScript

Here is my take to the challenge:

function removeQuestionMarks(input) {
  if (typeof input !== "string") {
    throw new TypeError("First argument expected to be a string");
  } 

  return input.split("?").join("");
}

console.log(removeQuestionMarks("hello?"));
// "hello"

console.log(removeQuestionMarks("hmm? hello??"));
// "hmm hello"

console.log(removeQuestionMarks("hmm? hello?? can i speak to the manager?"));
// "hmm hello can i speak to the manager"

console.log(removeQuestionMarks("?? is anybody there???"));
// " is anybody there"

Source-Code

Available online.

Side-note

By the name of the title in my notifications, I really though that the challenge would be to write a challenge and submit the best to the Dev.to team as they were running out of ideas. Haha!

[George]

Tomorrows challenge:

Write a random challenge generator!

[Amin]

Oh, sounds sexy. I love it! Haha.

[Peter Kim Frank]

By the name of the title in my notifications, I really though that the challenge would be to write a challenge and submit the best to the Dev.to team as they were running out of ideas. Haha!

Please submit challenge ideas! Simply email [e-mail] with any proposals and we'll give you credit when we post it :)

[Amin]

Hey there! Nice to see some bash users here.

You can even use bash without sed using this little trick:

#!/usr/bin/env bash

string="??hello??"

echo $string # "??hello??"
echo ${string//\?/} # "hello"

Try it online.

See Manipulating String.

[Roadirsh]

PHP :

str_replace('?', '', $string) 

[Amin]

Hey there! Awesome to see some PHP users. PHP IS NOT DEAD! Haha.

But you are halfway done buddy!

Today's challenge requires you to write a function which removes all question marks from a given string.

[Roadirsh]

okay okay let's do a wrapper function then :D

function myOwnStrReplaceBecauseIDontLikeSnakeCase($string) {
  return str_replace('?', '', $string);
}

[Amin]

That function name tho. haha!

[Jay]

Rust

fn no_questions (s: &str) -> String {
    s.chars().filter(|&c| c != '?').collect()
}

Playground

[JavaScript Room]

This one works for me. Since Bash doesn't support the global flag for regular expressions I had to iterate over the input string...

removeQuestionMark () {
    result=""
    while read -n 1 char ; do
        if [ "$char" != "?" ] ; then
            result="$result$char"
        fi
    done <<< $1
    echo $result
}

removeQuestionMark "h?e?l?l?o?" # prints "hello"

[David Wickes]

Try tr instead. 😁

[Craig McIlwrath]

Haskell:

removeQuestionMarks :: String -> String
removeQuestionMarks = filter (/='?') 

[Amin]

Similar in Elm (but we have to use wrapping parenthesis for binary operators).

removeQuestionMarks : String -> String
removeQuestionMarks = String.filter ((/=) '?')

[Amin]

I've never had the courage to deep dive into the Fish shell honestly but your comment gave me some strength. I'll fire up a Docker container to test it out. Added to my ToDo list! Thanks.

[Seiei Miyagi]

ruby <3

def remove_question_marks(s)
  s |> delete ??
end

[SavagePixie]

const questionToStatememt = str => str.replace(/\?+/g, '')

[Josh]

... 😐

I mean... that's not even a function to write. It's a function to call.

Elixir:

"What is this? What's happening??" |> String.replace("?", "")

Ruby:

"What is this? What's happening??".gsub("?", "")

JavaScript:

"What is this? What's happening??".replace(/\?/g, "")

Bash:

echo "What is this? What's happening??" | sed s/\?//g

[Josh]

Okay, I'll bite and imagine that Carmen Sandiego has stolen all the regular expressions!

defmodule DarnYouCarmen do
  # Quick, destroy the question marks before she steals them, too!
  def whats_a_question(string, processed \\ [])
  def whats_a_question("", processed), do: IO.chardata_to_binary(processed)
  def whats_a_question("?"<>string, processed), do: whats_a_question(string, processed)
  def whats_a_question(<<next :: utf8>> <> string, processed), do: whats_a_question(string, [processed, next]
end

DarnYouCarmen.whats_a_question("What is this? What's happening??")
# "What is this What's happening"

[Jarod Smith]

const removeQuestionMarks = str => str.replace(/\?+/g,'');

[Chris Achard]

Even though this is a simple one - it's really interesting to see all of the different ways you can do it!

But I agree with Josh - it's built into most languages :)

str.replace("?", "")