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Remove three consecutive duplicates from string

remove three consecutive duplicates from string

Forum Rules. Help Forgotten Your Password? Remember Me? Results 1 to 10 of Remove consecutive duplicates. Attached Files Presidents since WW2. Register To Reply. Re: Remove consecutive duplicates.

May the vba code be with you Re: Remove consecutive duplicates Just curios, What did you do exactly? Re: Remove consecutive duplicates FWiW Re: Remove consecutive duplicates Instead of using one data table and trying to get my data from that, I manually entered another without the consecutive duplicates.

Now I can use formula to extract the data from either. However, I'm going to try Glenn's too because I want to learn. Edit: Glenn could you explain the formula to me please?

It works perfectly, thanks. Re: Remove consecutive duplicates An alternative, minus the first part of the sheet. Re: Remove consecutive duplicates Would you prefer an explanation of the Post 5 or Post 7 version?

Re: Remove consecutive duplicates post 7 please. Re: Remove consecutive duplicates OK On every occasion in B1 to U1, where the value is different from the cell to the left of it A1 to t1 Orange: return the column number. Cyan: Then return the corresponding calues from those columns, Green: starting from the smallest column no 15 and ignoring any errors 6 Blue: one at a time, this is simply a counter that incements 1, 2, 3, etc as it is copied down Black: if you find an error, return a blank.

This shows you, one step at a time, what Excel is doing. Unfortunately, it cannot be resized. Replies: 6 Last Post:PM.In Python, we generally wish to remove the duplicate elements, but sometimes for several specific usecases, we require to have remove just the elements repeated in succession.

This is a quite easy task and having a shorthand for it can be useful. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Writing code in comment? Please use ide. Python3 code to demonstrate. Output: The original list is : [1, 4, 4, 4, 5, 6, 7, 4, 3, 3, 9] The list after removing consecutive duplicates : [1, 4, 5, 6, 7, 4, 3, 9]. Output: The original list is : [1, 4, 4, 4, 5, 6, 7, 4, 3, 3, 9] List after removing consecutive duplicates : [1, 4, 5, 6, 7, 4, 3, 9]. Check out this Author's contributed articles. Load Comments. We use cookies to ensure you have the best browsing experience on our website.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How can I remove duplicate characters from a string using Python?

For example, let's say I have a string:. If order does matter, you can use a dict instead of a set, which since Python 3. In the CPython implementation, this is already supported in Python 3. In earlier versions of Python, you can use collections. OrderedDictwhich has been available starting from Python 2. As was mentioned "". OrderedDict will do. As string is a list of characters, converting it to dictionary will remove all duplicates and will retain the order.

Learn more. Removing duplicate characters from a string Ask Question. Asked 8 years, 3 months ago. Active 3 months ago. Viewed k times. AljoshaBre - use the 'close' button and select close as dupe and supply that link.

Python list - Remove consecutive duplicates (3 Ways)

AljoshaBre None of those answers are guaranteed to maintain order. The link is actually already there. Just 4 clicks. Active Oldest Votes. If order does not matter, you can use "". Sven Marnach Sven Marnach k 96 96 gold badges silver badges bronze badges. True enough. But it's almost 8 times faster than OrderedDict. DSM: Usually, the speed only matters if the string is long. In Python 2. Taking this into account, it's O n. It won't get really bad even for very long strings though it is easy to construct cases where it is 8 times slower than the OrderedDict approach.

Sven Marnach: Hmm, I hadn't even though about character set restrictions. Create a list in Python and also a set which doesn't allow any duplicates. Soudipta Dutta Soudipta Dutta 5 5 silver badges 4 4 bronze badges. Eugene Berezin Eugene Berezin 41 2 2 bronze badges.

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We can do it simply by using Regex libs of python. Kevin Coffey Kevin Coffey 1 1 silver badge 6 6 bronze badges. Marcin: I don't understand that at all. Won't c always be in set foo?In this method the main idea is to first remove duplicates from the input string and if there are any duplicates in output string remove them recursively until we have no duplicates in output string. Add all the unique characters of input string to output string, if the length of input string is same as output string then stop, else.

Start from the leftmost character and if there are any duplicates in left corner remove them. Now, the first character is different from its adjacent character, recur for the remaining string of length n Else if the last removed character in recursive calls is same as the first character of the original string.

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remove three consecutive duplicates from string

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String Interview Questions. Tree Interview Questions.Given a string, you have to remove the three consecutive duplicates from the string. If no three are consecutive then output the string as it is. Explanation : We insert the characters of string one by one to vector and keep on checking the size of vector.

Reduce the string by removing K consecutive identical characters

If the size of vector is greater than 2, then we will check whether the last 3 characters of the string are same or not. If the characters are same then we will move three steps backwards in array using resize else not. This article is contributed by Roshni Agarwal. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Remove three consecutive duplicates from string

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Become industry ready at a student-friendly price. Writing code in comment? Please use ide. Python3 program to remove three consecutive duplicates.

This code is contributed by. Add str[i]. Write v[i]. Load Comments. We use cookies to ensure you have the best browsing experience on our website.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. You could use std::array and get rid of max define. In general, I'd like to suggest avoiding defines which can conflict with any stl names by any cost.

At least, it doesn't actually removes anything. It perform some kind of initialization from given string, so consider choosing more intuitive name. Stack::modifyString also says nothing about its purpose and it also constructs another string instead of modifying something. Consider better naming. As alternative, you can construct new string directly from Stack::stk.

In this case you can pass all std::string parameters by const reference. BTW, I'm assure you're already bored with my variable naming suggestions, so I don't need to add another one here :. It's hard to determine whether some variable is a class member or not.

In order to simplify your work, make member variables somehow. Especially as the checking simply prints a diagnostic and then ignores the action that was requested. So we can write. Here, we're iterating over the elements of strso we can use for char c: strwhich is clearer and less error-prone than using indexes. We have standard algorithms - one similar to our needs is std::unique. This makes a single pass over its input, and returns an iterator to the new end position.

I've made this a template, so it can work with any container.Could you please elaborate the question. Are we supposed to remove only the triplets or any kind of duplicate elements whether they are double, triple or quadriple? Using stack. Insert each char one by one into a stack. Before insert check the following: If char to be inserted say C is same as top 2 elements T1 and T2 of the stack.

If so remove T1, T2 and don't insert C. If not insert C onto stack Contents of stack gives the final string in reverse order. You could also use a double linked list or double ended queue to avoid reversing at the end, at the cost of increased storage due to additional pointers.

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remove three consecutive duplicates from string

All our interviewers have worked for Microsoft, Google or Amazon, you know you'll get a true-to-life experience. Comment hidden because of low score. Click to expand. Shouldn't the sample output be 'ccdc' if the question is correct? This needs a little bit more detail You could also use a double linked list or double ended queue to avoid reversing at the end, at the cost of increased storage due to additional pointers - codingwarrior01 January 30, Flag Reply.

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