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

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