It seems like scala\'s parser combinators don\'t backtrack. I have a grammar (see bottom) which can\'t parse the following \"stmt\" correctly:
I am trying to find the best way to solve the following problem. By best way I mean less complex. As an input a list of tuples (start,length) such:
During a recent job interview, I was asked to give a solution to the following problem: Given a string s (without spaces) and a dictionary, return the words in the dictionary that compose the string.
i want to 开发者_JAVA技巧build a sorting method to sort array \"4,2,7,5,1\" into \"1,2,4,5,7\" my current code is
As a generically brewed example for the purpose of this question, my intent is to match some number of a\'s, then an equal number of b\'s, plus one more b.
Ok, the real problem is slightly more complicated because it uses some classes that I\'ve written instead of Strings, but it can be imagined like this: If you have a list of 700ish 3-letter words, how
Is there any build-in predicate in SWI-Prolog that will always fail AND prevent machine from backtracking - it is stop the program from executing immediately (this is not what fail/0 does)开发者_开发知
Is there any way开发者_如何学Go in C/C++to stop a backtracking algorithm after finding the first solution without exiting the program.
Wikipedia about Depth First Search: Depth-first search (DFS) is an algorithm for traversin开发者_开发百科g or searching
I\'m stuck on the extended exercise 28.2 of How to Design Programs.I used a vector of true or false values to represent the board instead of using a list.This is what I\'ve got which doesn\'t work:
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