hashtable

问题 I'm not sure which one is better. I need to parse each character of an input string and get a replacing string for the character. For some objects all alphanumeric characters are allowed so using switch/case will cause a lot of code and reduce readability and maintainability but I can use a static method. Using a HashTable also requires a lot of code Using the static method: private static string EncodeChar(char c) { var symbols = string.Empty; switch (c) { case '0': symbols = "Test"; break;

问题 I need to store short strings (50+ characters), and quickly look them up. At first I wanted to use SQLite for this. I created a single table with a single indexed TEXT column. Using all kinds of low-level tricks I could fill the database with 1 million strings in 10 seconds. The problem was that if the PC was rebooted, adding an additional 10.000 rows took 30 seconds, which is nowhere in line with 1M rows in 10s. The reason for this is that SQLite has to read a very large part of the existing

问题 I have two hash tables. I want to compare values of both the hash tables based on the key. I want to do this in loop and if match is found is want to perform string building operation. But the problem is I dont know any mechanism to compare them in loop. Please guide me... Following are my hash tables to be compared HashTable OldTable= new HashTable(); OldTable.Add("Date of Event", OCEFData.EventDate); OldTable.Add("Angina Status", OCEFData.AnginaStatusValue); OldTable.Add("Please indicate

问题 so right now I am working in Powershell and am working with my first Hash Table. So with my code I have a variable that gets the Metadata of the file and I want that variable to pass through a hash table to get to shorten the Metadata. For example the file I'm working with is version v2.0.50727 which I want to turn into "lib\net20" I know the set up I have now doesn't work, I think I need to do a substring to get what I want but I have no idea how to set that up. $retCode = 0 write-verbose

问题 How can I ensure that an element is in my HASH_TABLE, if it is detachable? Current = HASH_TABLE[ARRAYED_SET[G], G] add_edge (src: G; dst: G) do if attached Current.at(src) as edges then edges.put(dst) end ensure in: Current.at (src).has (dst) end 回答1: Have you try that: add_edge (src: G; dst: G) do if attached Current.at(src) as edges then edges.put(dst) end ensure in: attached Current.at (src) as edges implies edges.has (dst) end 来源： https://stackoverflow.com/questions/20935201/detachable

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I made a program recently that dealt with a lot of if/else statements to return particular values. Someone recommended to use lookup tables instead. My question is, how do they work and how do you implement it? What is the difference between a map, hash table, and lookup table. This

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed last year . I made a program recently that dealt with a lot of if/else statements to return particular values. Someone recommended to use lookup tables instead. My question is, how do they work and how do you implement it? What is the difference between a map, hash table, and lookup table. This

问题 I am working in a library in which some elements, that do not matter here, must be identified with a name (i.e. values are associated to names). Names are strings for the user, whatever their internal representation is, and should behave transparently. Names are constant and initialized with strings literals. They are known at compile-time. Two names that were initialized with different strings must compare different , whatever their internal representation is. Names may be of arbitrary

问题 I am working in a library in which some elements, that do not matter here, must be identified with a name (i.e. values are associated to names). Names are strings for the user, whatever their internal representation is, and should behave transparently. Names are constant and initialized with strings literals. They are known at compile-time. Two names that were initialized with different strings must compare different , whatever their internal representation is. Names may be of arbitrary

问题 I have a method, accepting a Hashtable (yes I know, it's outdated..) as argument: public static LuaTable HashtableToLuatable(Hashtable t, int depth = 1) This works correctly. Now I'd like to accept an ArrayList as first parameter as well, so you can let 't' have the value of both a Hashtable and an ArrayList. Currently I have copy-pasted the method two times, like this: public static LuaTable ArraylistToLuatable(ArrayList t, int depth = 1) The rest is exactly the same. I think there's a way