Showing unique characters in a string only once

Question

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 1

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 2

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 3

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 4

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 5

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 6

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 7

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 8

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 9

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 10

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 11

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 12

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 13

I have a string with repeated letters. I want letters that are repeated more than once to show only once. For instance I have a string aaabbbccc i want the result to be abc . so far my function works like this:

• if the letter doesn't repeat, it's not shown
• if it's repeated once, it's show only once (ie aa shows a)
• if it's repeated twice, shows all (ie aaa shows aaa)
• if it's repeated 3 times, it shows 6 (if aaaa it shows aaaaaa)

function unique_char(string) {
    var unique = '';
    var count = 0;
    for (var i = 0; i < string.length; i++) {
        for (var j = i+1; j < string.length; j++) {
            if (string[i] == string[j]) {
                count++;
                unique += string[i];
            }
        }
    }
    return unique;
}

document.write(unique_char('aaabbbccc'));

The function must be with loop inside a loop; that's why the second for is inside the first.

Answer 14

if you want to return values in a array you can use this below function.

    const getUniqueChar=(str)=>str.split('').filter((item, index, arr)=> 
    arr.slice(index+1).indexOf(item)===-1);

    console.log(getUniqueChar("aaabbbccc"));

OR

You can use Set constructor

    cosnt getUniqueChar=(str)=>
    new Set(str.split(''));
    console.log(getUniqueChar('aaabbbccc'));

Answer 15

let unique=myArray.filter((item,index,array)=>array.indexOf(item)===index)