Menu
I have to make a function in JavaScript that removes all duplicated letters in a string. So far I've been able to do this: If I have the word "anaconda" it shows me as a result "anaconda" when it should show "cod". Here is my code:
function find_unique_characters( string ){
var unique='';
for(var i=0; i<string.length; i++){
if(unique.indexOf(string[i])==-1){
unique += string[i];
}
}
return unique;
}
console.log(find_unique_characters('baraban'));
355
Using the indexOf() and lastIndexOf() method, we can find the first non-repeating character in a string in Java. The method indexOf() returns the position of the first occurrence of a given character in a string whereas method lastIndexOf() returns the position of the last occurrence of a given character in a string.
If we want to know whether a given string has repeated characters, the simplest way is to use the existing method of finding first occurrence from the end of the string, e.g. lastIndexOf in java. In Python, the equivalence would be rfind method of string type that will look for the last occurrence of the substring.
Using Set:
removeDuplicates = str => [...new Set(str)].join('');
Thanks to David comment below.
196
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
