Create JS function to remove spaces from giving string. ( Using core js and not in-built trim function.)

#javascript #array #string #trim

const trim = (string) => {
    let strArr = string.split("");
    let trimedStr = [];
    strArr.forEach((item) => {
      if (item !== " ") {
        trimedStr.push(item);
      }
    });
    return trimedStr.join("");
  };

  console.log("trim", trim("Hello world nice world"));
 // output => trim: Helloworldniceworld

Problem Explanation

Let's break down the problem in simple terms:

You have a piece of code that defines a function called trim. The purpose of this function is to remove all the spaces from a given string. In other words, if you pass a sentence with spaces into this function, it will return the same sentence but with all the spaces removed.

How the Function Works:

Splitting the String: The function starts by taking the input string (e.g., "Hello world nice world") and splits it into an array of individual characters. For example, "Hello world" becomes ['H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd']...
Filtering Out Spaces: The function then goes through each character in the array. If the character is not a space (' '), it adds it to a new array called trimedStr. If it is a space, it simply skips it.
Rejoining the Characters: After filtering out the spaces, the function takes the remaining characters and joins them back together into a single string without any spaces.
Returning the Result: Finally, the function returns the new string that has no spaces.

Top comments (4)

Jon Randy 🎖️ • Aug 15 • Edited

Filtering out spaces is not what trim does. It will remove leading and trailing whitespace.

There is also an issue with the way you're splitting the string. Try your code with a string containing emojis - it will break. A better, although still not perfect version of your code would be:

const trim = string => {
  let trimmedStr = '';
  [...string].forEach(char => trimmedStr += char!= ' ' ? char: '')
  return trimmedStr
}

console.log("trim", trim("Hello world nice world"))
// output => trim: Helloworldniceworld

console.log("trim", trim("Hello world nice 🙂world"))
// output => trim: Helloworldnice🙂world