Is there a period, question mark, apostrophe, or space in the input string?

Question

Is there a period, question mark, apostrophe, or space in the input string?

Currently, I am in the process of developing a program that can determine if an input string includes a period, question mark, colon, or space. If these punctuation marks are not present, the program will return "false". However, if any of them are found, the program will output all characters before the first instance of the punctuation. For example, given the string "grey cat", the program should return "grey" because it encountered a space. Is it possible to use logical OR operators in Javascript? I would prefer a solution without utilizing built-in functions, and efficiency is not a priority.

Update: The current version of the program is only displaying the original string. How can I modify it to print only the characters that appear before any punctuation?

function find_punctuation(str){
   let result = "";
   for (let i = 0; i < str.length; i++ ){
      if (str[i] === "." || str[i] === "?" || str[i] === "" || str[i] === ","){
         break;
      } else {
         result += str[i];
      }
   }

   return result;
}
console.log(find_punctuation('he. y'));

javascript

Answer 1

Answer №1

function extract_text_before_punctuation(str) {
  let result = "";

  for (let i = 0; i < str.length; i++) {
    // Check if the current character is a punctuation mark.
    const is_punctuation = (
      str[i] === "." ||
      str[i] === "?" ||
      str[i] === " " ||
      str[i] === ","
    );

    if (is_punctuation) {
      // If it's a punctuation mark, stop and return the text before it.
      break;
    } else {
      // If not a punctuation mark, add the character to the result string.
      result += str[i];
    }
  }

  // The result string now contains all characters until the first punctuation mark.
  // The loop stops as soon as it encounters any punctuation mark in the input string.
  return result;
}

console.log(extract_text_before_punctuation('he. y'));
console.log(extract_text_before_punctuation('hell,o'));
console.log(extract_text_before_punctuation('hello'));
console.log(extract_text_before_punctuation('cat?erpillar'));
console.log(extract_text_before_punctuation('grey cat'));

Answer 2

function extract_text_before_punctuation(str) {
  let result = "";

  for (let i = 0; i < str.length; i++) {
    // Check if the current character is a punctuation mark.
    const is_punctuation = (
      str[i] === "." ||
      str[i] === "?" ||
      str[i] === " " ||
      str[i] === ","
    );

    if (is_punctuation) {
      // If it's a punctuation mark, stop and return the text before it.
      break;
    } else {
      // If not a punctuation mark, add the character to the result string.
      result += str[i];
    }
  }

  // The result string now contains all characters until the first punctuation mark.
  // The loop stops as soon as it encounters any punctuation mark in the input string.
  return result;
}

console.log(extract_text_before_punctuation('he. y'));
console.log(extract_text_before_punctuation('hell,o'));
console.log(extract_text_before_punctuation('hello'));
console.log(extract_text_before_punctuation('cat?erpillar'));
console.log(extract_text_before_punctuation('grey cat'));

Answer 3

Answer №2

To extract text before punctuation marks, consider using a regular expression:

function extract_text_before_punctuation(str) {
  let result = str.match(/^(.*?)[.?: ]/);
  if (result) {
    return result[1];
  } else {
    return false;
  }
}
console.log(extract_text_before_punctuation('he.y'));
console.log(extract_text_before_punctuation('hey'));

Answer 4

To extract text before punctuation marks, consider using a regular expression:

function extract_text_before_punctuation(str) {
  let result = str.match(/^(.*?)[.?: ]/);
  if (result) {
    return result[1];
  } else {
    return false;
  }
}
console.log(extract_text_before_punctuation('he.y'));
console.log(extract_text_before_punctuation('hey'));

Answer 5

Answer №3

Give this a shot:

function remove_punctuation(text){
   let cleanText = "";
   for (let j = 0; j < text.length; j ++ )
      if (text[j] === "." || text[j] === "?" || text[j] === "  ") break
      else cleanText += text[j]

   return cleanText
}
console.log(remove_punctuation('hi!'));

Answer 6

Give this a shot:

function remove_punctuation(text){
   let cleanText = "";
   for (let j = 0; j < text.length; j ++ )
      if (text[j] === "." || text[j] === "?" || text[j] === "  ") break
      else cleanText += text[j]

   return cleanText
}
console.log(remove_punctuation('hi!'));

Is there a period, question mark, apostrophe, or space in the input string?

Answer №1

Answer №2

Answer №3

Similar questions

Utilizing NextJS Image Component in Conjunction with Auth0

Ways to address observables in Angular in a manner similar to deferred objects

Using an npm package in client-side JavaScript

Ways to confine the tabindex within a specific div container

Problem with Gulp-Watch Functionality on Windows 7 - Node.js, NPM, and Gulp All Up and Running Fine

using jquery to retrieve the current time and compare it

Configuring IP Whitelisting for Firebase Cloud Functions with MongoDB Cluster

tips for setting the value of a checkbox to true in React Material-UI with the help of React Hooks

bindings and validation of input values in angularjs

Enhance Material UI with custom properties

Protractor functions perfectly on localhost, but encounters a Timeout error when used remotely - the asynchronous callback was not executed within the specified timeout period

Incorporating Bootstrap JS into Next.js

Step-by-step guide on validating a user in Joomla using AJAX and jQuery

Entering a value into an HTML textbox using Awesomium in VB.NET

What is the name of the scrolling header effect achieved in the following?

Is there a way to remove text from a div when the div width is reduced to 0?

The iframe is displaying a MIME warning for pdfmake: Resource being interpreted as a Document but transferred with MIME type application/pdf

The div is incorrect and causing the label and input to move in the wrong direction

Retrieving a specific Project ID from Asana Task API using Node.js and parsing the JSON response

Integrating React js with Layout.cshtml: Mastering the Fusion of React Routing and ASP.NET MVC Routing