trie

问题 I am implementing an autocomplete feature using a Trie. Using the words list in this link, I am inserting every word into my Trie. I want to reduce the memory used by the Trie without using something too fancy like a directed acyclic word graph. The Trie is dictionary based to allow for it to be stored in a JSON file. This is my current script: import json #Make a trie of english words # The words file can be found at https://github.com/dwyl/english-words with open('words_dictionary.json', 'r

问题 How is the prefix string location handling implemented within nginx? http://nginx.org/r/location Specifically, it's widely reported that the http://nginx.org/r/server_name matching is done through a hash table — http://nginx.org/docs/http/server_names.html — but there isn't a similar level of detail on the implementation of the location directive. 回答1: The prefix-based location tree is defined to have 3 child node elements at each node: http://ngx.su/src/http/ngx_http_core_module.h#ngx_http

问题 I have a large list of domain names (around six thousand), and I would like to see which words trend the highest for a rough overview of our portfolio. The problem I have is the list is formatted as domain names, for example: examplecartrading.com examplepensions.co.uk exampledeals.org examplesummeroffers.com +5996 Just running a word count brings up garbage. So I guess the simplest way to go about this would be to insert spaces between whole words then run a word count. For my sanity I would

问题 I need to have an array of python objects to be used in creating a trie datastructure. I need a structure that will be fixed-length like a tuple and mutable like a list. I don't want to use a list because I want to be able to ensure that the list is exactly the right size (if it starts allocating extra elements, the memory overhead could add up very quickly as the trie grows larger). Is there a way to do this? I tried creating an array of objects: cdef class TrieNode: cdef object members[32]

问题 I need to develop a cache system for tree based key-value (very similar to windows registry editor). in that cache keys are strings which represents path in the tree to the value,which can be primitive type(int,string,bool,double etc.) or subtree by it self. for example : key = root\x\y\z\w , value = the whole subtree under w key = root\x\y\z\w\t , value = integer I thought about using Redis as simple cache implemntation, but naive key-value will miss the point of tree hierarchy. in addition,

问题 The purpose: This function parses through a string trie following the path that matches an input string of characters. When all the char in the string are parsed, true is returned. I want to step over a char and return if there is still a valid path. The application: the strings are a location hierarchy for a highway project. So, project 5 has an alignment C, that has an offset of N and a workzone 3; 5CN3. But, sometimes I want to define a string for all child locations for a project task

问题 This is what I'm doing now: private var accounts = Vector.empty[Account] def removeAccount(account: Account) { accounts = accounts.filterNot(_ == account) } Is there a more readable solution? Ideally, I'd like to write accounts = accounts.remove(account) . 回答1: I'd use this: accounts filterNot account.== Which reads pretty well to me, but ymmv. I'd also like a count that doesn't take a predicate, but the collection library is really lacking in specialized methods where one with a predicate

问题 Introduction The following function iteratively traverses a tree structure made of nested vectors. It tests each leaf against a predicate. The paths to all leaves which pass that truth-test are returned in a Trie structure. The later describes all found paths in a non-redundant way. (defn get-trie-of-matches [is? tree] (loop [[tree i path fk] [tree 0 [] nil] accum {}] (cond (>= i (count tree)) ;; end of level / go up (if (nil? fk) accum (recur fk accum)) (vector? (tree i)) ;; level down

问题 I’m a C# beginner and at the moment I’m trying to challenge myself with different problems. At the moment I’m trying to build a web application where you can input letters and wildcards to search after possible words. Trough previous questions about this I’ve decided to build a Trie containing letters generated from 400k+ words. Later I’ll search the Trie for possible word matches depending on letter and wildcard input. I’ve built two classes, one representing one node in the Trie and one

问题 I am building a Trie tree that will have about 27000 of the nodes below. Instead of recreating it every time on app start, I would like to persist. Because the child property is a dictionary to another node, I'm having trouble using NSCoding to archive and store it in the core data entity. Is there a way to store this node in Core Data? Or should I be using a different type of persistence? class TrieNode { var letter:Character var fullWord:Bool var leadingLetters:String var child = [Character