Kevin Powell - Community•3y ago

Convert Array to String

Hello, I have some problems to convert Array to String. So in my example code i have an array of 4 items. I do know that i can just arr.join(" ") to convert it to a string. However, i don't want to include the first item from the array in my new string. I have created a code that kinda works but is there any better way to do it? This is my example code

let arr = "Item1 Item2 Item3 Item4",
    newmsg = ""

arr = arr.split(" ")

if(arr[0] === "Item1") {
  for(let i = 1; i < arr.length; i++) {
    if(i === arr.length -1) { 
      newmsg += arr[i]
    }else{
      newmsg += arr[i]+" "
    }
  }
  console.log(newmsg) 
}

let arr = "Item1 Item2 Item3 Item4",
    newmsg = ""

arr = arr.split(" ")

if(arr[0] === "Item1") {
  for(let i = 1; i < arr.length; i++) {
    if(i === arr.length -1) { 
      newmsg += arr[i]
    }else{
      newmsg += arr[i]+" "
    }
  }
  console.log(newmsg) 
}

10 Replies

Kevin Powell•3y ago

Right now, you don't have an array, you only have a string... You need to wrap it in square brackets to make an array, and then you'll want each item be have quotes around it too, since each one is a string, or else it'll just be an array with one item in it let arr = ["Item1", "Item2", "Item3", "Item4"]

Tok124 (CSS Nerd)OP•3y ago

I am using arr.split(" ") to convert the string to an array Then i want to convert it back to a string but not include "Item1 "

Tok124 (CSS Nerd)OP•3y ago

If you check the MDN you can see that it does convert the string to an array https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split

String.prototype.split() - JavaScript | MDN

The split() method takes a pattern and divides a String into an ordered list of substrings by searching for the pattern, puts these substrings into an array, and returns the array.

Tok124 (CSS Nerd)OP•3y ago

and also Array.isArray(arr) does return true which confirms that it is indeed an array

Kevin Powell•3y ago

oh, fair enough, lol. I just saw the first line and stopped looking, my bad 😅

Tok124 (CSS Nerd)OP•3y ago

Aaah heh :p it's fine 😂

MarkBoots•3y ago

arr.slice(1) will make an array starting from index 1, then it joins with a space

const newmsg = arr.slice(1).join(" ")

const newmsg = arr.slice(1).join(" ")

if you want to drop the first word from the text, without splitting it to an array, you can do

const string = "Item1 Item2 Item3 Item4"
const newmsg = string.substr(string.indexOf(' ') + 1);
console.log(newmsg) //"Item2 Item3 Item4"//

const string = "Item1 Item2 Item3 Item4"
const newmsg = string.substr(string.indexOf(' ') + 1);
console.log(newmsg) //"Item2 Item3 Item4"//

Tok124 (CSS Nerd)OP•3y ago

Oh thanks. This seems to work !

MarkBoots•3y ago

with your original loop approach you can simplify it to

let msg = "";
for(let i = 1; i < arr.length; i ++) { //from index 1 to last index off arr (skip index 0)
  msg += arr[i] //add arr[index] to msg
  if(i !== arr.length - 1) msg += " " //if not the last index, add a space
}
console.log(msg)

let msg = "";
for(let i = 1; i < arr.length; i ++) { //from index 1 to last index off arr (skip index 0)
  msg += arr[i] //add arr[index] to msg
  if(i !== arr.length - 1) msg += " " //if not the last index, add a space
}
console.log(msg)

Tok124 (CSS Nerd)OP•3y ago

Oh alright. Thank you very much, i will try this 🙂

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Convert Array to String