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JavaScript Remove non-duplicate characters from string
We are required to write a JavaScript function that takes in a string and returns a new string with all non-duplicate characters removed from it.
For example −
If the input string is −
"teeth_foot"
Then the output should be −
"teetoot"
Therefore, let's write the code for this function −
Example
const str = 'teeth_foot';
const removeNonDuplicate = str => {
const strArray = str.split("");
const duplicateArray = strArray.filter(el => {
return strArray.indexOf(el) !== strArray.lastIndexOf(el);
});
return duplicateArray.join("");
};
console.log(removeNonDuplicate(str));Output
The output in the console will be −
teetoot
Updated on 31-Aug-2020 06:57:46
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