CODEWITHSUNDEEP
javascriptstring
J.G.Sable
J.G.Sable

Reputation: 1388

concatenating a string per letter

I have users inputting letters a single char into a time through an input field. Each char is taken and saved into an array called rightLtrsArr.

What I need to do is take all the letters that are stored in that array as separate elements and make them into a string. The string would be updated for each letter the user enters. Since I know I can't push a new char into a string, but would have to concatenate two strings together to create a new one, I've been trying to do this through a loop like so:

for (var i = 0; i < rightLtrsArr.length; i ++){
    guessedWord = rightLtrsArr.concat([i]);
    console.log("the guessed word is " + guessedWord);
}

Needless to say, this hasn't worked out so well. Is my syntax wrong? What am I missing here?

Upvotes: 0

Views: 1563

Answers (5)

01010011 01000010
01010011 01000010

Reputation: 366

There's a shortcut to do what you want:

rightLtrsArr.join('')

.join() combines joins all of the elements of an array into a string. As for a solution more like yours, you should start with an empty string and append it.

var guessedWord = "";
for (var i = 0; i < rightLtrsArr.length; i ++){
    guessedWord += rightLtrsArr[i];
};
console.log("the guessed word is " + guessedWord);

Upvotes: 0

Ryan Wilson
Ryan Wilson

Reputation: 10765

Declare a variable, and then append to that in your loop.

     let guessedWord = "";
     for(let i = 0; i < rightLtrsArr.length; i++){
            guessedWord += rightLtrsArr[i];
     }
     console.log("the guessed word is " + guessedWord);

Upvotes: 0

Ph0b0x
Ph0b0x

Reputation: 674

If you want to concatenate the characters in your array you might need to do something like:

for (var i = 0; i < rightLtrsArr.length; i ++){
    guessedWord += rightLtrsArr[i];
}
console.log("the guessed word is " + guessedWord);

I am not familiar with the .concat() function but please let me know if this works.

Check this fiddle out.

Upvotes: 0

גלעד ברקן
גלעד ברקן

Reputation: 23955

Something like this?

rightLtrsArr = ['a','b','c']
guessedWord = '';

for (var i = 0; i < rightLtrsArr.length; i ++){
    guessedWord = guessedWord.concat(rightLtrsArr[i]);
}

console.log("the guessed word is " + guessedWord);

// Alternative:
// console.log("the guessed word is " + rightLtrsArr.join(''));

Upvotes: 0

mdatsev
mdatsev

Reputation: 3879

You can use the useful JavaScript function called join that is made for just this purpose - joining an array. You can use it like this:

let rightLtrsArr = ['h', 'e', 'l', 'l', 'o'];

let guessedWord = rightLtrsArr.join('');
console.log("the guessed word is " + guessedWord);

Note: The parameter is what to separate the elements by - in this case we don't want to separate them so we pass an empty string.
Note 2: You can use this function to join not only single characters but any array.

Upvotes: 3

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