How to delete duplicate characters in a JavaScript string,

How to delete duplicate characters in a JavaScript string,

This topic describes how to delete repeated characters in a string. No matter whether it is of practical value or not, it is quite good to learn algorithms.

The Code is as follows:

function dropRepeat(str){ var result=[]; var hash={}; for(var i=0, elem; i<str.length;i++){  elem=str[i];  if(!hash[elem]){   hash[elem]=true;   result=result+elem;  } } return result;}

The functions in the above Code can delete repeated characters in strings. Example:

dropRepeat("abcdd") 

The returned value is abcd.

Next, let's share Python: remove the repeated characters in the string.

python 2.7：#-*- encoding:utf-8 -*-string = 'abc123456ab2s'r = ''.join(x for i, x in enumerate(string) if string.index(x) == i)print stringprint r

The output is as follows:

Abc123456ab2s
Abc123456s

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