lexicographic Questions

7

Solved

What is the exact meaning of lexicographical order? How it is different from alphabetical order?
Electromotor asked 30/8, 2017 at 1:45

6

I am trying to sort an ArrayList of Strings that represent card values. So, some cards contain letters ("King") and some contain Strings containing only a number ("7"). I know to use Collections.so...
Derisible asked 8/6, 2010 at 16:9

6

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I was curious how std:next_permutation was implemented so I extracted the the gnu libstdc++ 4.7 version and sanitized the identifiers and formatting to produce the following demo... #include <v...
Munsey asked 14/7, 2012 at 10:37

8

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What does "compare two strings lexicographically" mean?

2

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I have a table with a String column but it holds only integers (as strings). Problem comes when I want to order_by this column on certain query. SQLAlchemy (or python more specifically) uses lexic...
Rochelle asked 5/4, 2016 at 2:28

6

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If A has the Ordered[A] trait, I'd like to be able to have code that works like this val collection: List[List[A]] = ... // construct a list of lists of As val sorted = collection sort { _ < _ ...
Braille asked 29/6, 2010 at 4:45

6

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I have the following operator< that is supposed to sort first by a value, then by another value: inline bool operator < (const obj& a, const obj& b) { if(a.field1< b.field1) ...
Anking asked 3/7, 2012 at 13:52

3

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I have a list which contains strings representing animal names. I need to sort the list. If I use sorted(list), it will give the list output with uppercase strings first and then lowercase. But I...
Tinatinamou asked 19/12, 2012 at 14:47

4

Remove all duplicates from a string and select the lexicographical smallest string possible. For example, the string cbacdcbc would return acdb, not adcb. So this has a relatively simple solution ...
Oehsen asked 27/12, 2015 at 1:32

8

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I know that when we are using template inside another template, we should write it like this: vector<pair<int,int> > s; and if we write it without the whitespace: vector<pair<i...
Purveyor asked 14/7, 2011 at 14:54

2

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Finding the Lexicographically minimal string rotation is a well known problem, for which a linear time algorithm was proposed by Jean Pierre Duval in 1983. This blog post is probably the only publi...
Sciuroid asked 11/4, 2019 at 23:52

12

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I want to sort a large array of integers (say 1 millon elements) lexicographically. Example: int input [] = { 100, 21 , 22 , 99 , 1 , 927 } int sorted[] = { 1 , 100, 21 , 22 , 927, 99 } I have don...
Buddhology asked 25/10, 2013 at 11:38

2

I have a string S which consists of a's and b's. Perform the below operation once. Objective is to obtain the lexicographically smallest string. Operation: Reverse exactly one substring of S e.g....
Paramilitary asked 15/9, 2017 at 16:30

4

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How is the lexicographic order defined in Java especially in reference to special characters like !, . and so on? An examplary order can be found here But how does Java define it's order? I ask b...
Impanel asked 24/10, 2011 at 11:33

3

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So I've been working on a Python script that combines some information into a "bed" format. Which means that I'm working with features on a genome, my first column is the scaffold name (string), th...
Ghat asked 15/6, 2016 at 11:33

2

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I am trying to solve this problem in spoj I need to find the number of rotations of a given string that will make it lexicographically smallest among all the rotations. For example: Original: a...
Liard asked 21/2, 2013 at 12:59

1

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I was wondering when a row subquery is performed with a comparison operator such as > or >=, is the order of comparison defined using lexicographic (i.e. dictionary) order or is it defined el...
Tibold asked 7/4, 2016 at 1:19

3

I have this code for sorting strings: class Program { static void Main() { int x = Convert.ToInt32(Console.ReadLine()); List<string> sampleList = new List<string>(); for (int i...
Citarella asked 1/3, 2016 at 15:47

4

Can anybody find any potentially more efficient algorithms for accomplishing the following task?: For any given permutation of the integers 0 thru 7, return the index which describes the permutati...

3

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I am trying to create a program that asks the user for three words and prints 'True' if the words are entered in dictionary order. E.G: Enter first word: chicken Enter second word: fish Enter th...
Numismatist asked 17/10, 2015 at 6:6

5

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If I have a class that I want to be able to sort (ie support a less-than concept), and it has several data items such that I need to do lexicographic ordering then I need something like this: str...
Destruct asked 23/3, 2010 at 14:28

1

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In the package initialization part of the Go specification, what does "lexical file name order" mean? To ensure reproducible initialization behavior, build systems are encouraged to present mul...
Alisa asked 27/7, 2015 at 10:40

2

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For permutations, given N and k, I have a function that finds the kth permutation of N in lexicographic order. Also, given a permutation perm, I have a function that finds the lexicographic index o...
Eun asked 22/1, 2014 at 21:1

4

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I have a struct with members x,y,z and w. How do I sort efficiently first by x, then by y, by z and finally by w in C++?
Hollyanne asked 13/6, 2013 at 6:40

7

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I frequently encounter situations, especially with sorting in C++, where I am comparing a series of fields in order to compare a larger structure. A simplified example: struct Car{ Manufacturer m...
Marrowfat asked 28/2, 2009 at 5:10

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