lookup

I need a hash function for a Look Up table, so that if my values are from 0 to N, I need a hash function that give me a value from 0 to n, being n << N. Another piece of information is that I already know N in advance. I have been investigatinv about different low cost hash functions and I have found only this: h = z mod n range(z) - 0 to N, range(h) - 0 to n My hash function needs to be implemented in HW, so it needs to have a very low cost. Can anyone recommend any other formula or algorithm apart from that simple thing?. When I say HW I mean a truly implementation in HW, and not

Which is faster to find an item in a hashtable or in a sorted list? yves Baumes Algorithm complexity is a good thing to know, and hashtables are known to be O(1) while a sorted vector (in your case I guess it is better to use a sorted array than a list) will provide O(log n) access time. But you should know that complexity notation gives you the access time for N going to the infinite. That means that if you know that your data will keep growing , complexity notation gives you some hint on the algorithm to chose. When you know that your data will keep a rather low length: for instance having

What is the relationship between java:comp/env and java:global (regarding 3.1 spec)? Seems like java:comp/env contains specific to EJB references. What means "specific" in this case? java:global is a namespace that's global for the entire application server, which includes other EAR modules (which are considered to be different applications). java:comp/env is a much smaller namespace. For the web module, it corresponds to all web components (servlets etc) which are all together considered to be a single 'component' for JNDI, but for EJB beans it's a namespace for a single bean, since every

i have below collections with document count division - 30, category - 248 productgroup - 1402 product - 60000 for example i given below data division { "divisionid": "1", "divisioncode": "0", "divisionname": "ELECTRONICS/HOME APPLIANCE", "divisionpoint": "2" }, { "divisionid": "2", "divisioncode": "1", "divisionname": "FOODS", "divisionpoint": "8" } category collection data's { "categoryid": "1", "divisionid": "1", "categorycode": "34", "categoryname": "AUDIO SYSTEM", "categorypoint": "Null" }, { "categoryid": "2", "divisionid": "1", "categorycode": "348", "categoryname": "DVD/VCD",

This question already has an answer here: How to use $lookup as INNER JOIN in MongoDB Aggregation? 1 answer I'm playing with mongoDB's $lookup function, specifically the pipeline syntax, to allow me to perform some more complex queries than the ORM I am using (Sails/Waterline) allows. A cut down version of my data looks like.... // 'job' collection { "id" : j1, "mediaID" : "ABC1234" }, { "id" : j2, "mediaID" : "DEF1234" }, { "id" : j3, "mediaID" : "FGH3456" } ..and.. // 'task' collection // j1 tasks { "id" : "t1", "job" : "j1", "taskName": "MOVE", "status" : "COMPLETE" }, { "id" : "t2", "job"

I just want to make sure i am doing this correctly. Derived columns: car truck Lookup (after derived column:) 1.Query: select * from dbo.store where A = ? and B = ?. 2.In column mapping/or advanced parameters I map car to A and truck to B. Correct? I ask this because I keep getting an OLE error. While I'm waiting to hear back on the error message, my assumption at this point is that you are using the lookup component incorrectly. Your query syntax presumes there will be a query executed for every row flowing through the component. The way the lookup component works with default configuration

I have a VBA function that I would like to pass a custom range of data (As opposed to a full table column range) only when certain criteria within that table is met. For example: Table_1 Table_2 A B C A B 1 Policy Data Status | 1 Policy Function -------------------------- | ------------------- 2 AA 25 approved | 2 AA [25, 35] 3 AA 19 unapproved | 3 BB [16] 4 BB 16 approved | 5 CC 27 approved | 6 CC 30 unapproved | 7 AA 35 approved In Table2, cell B2, I would like to return a range of all Data values from Table1 where Policy = AA and Status = approved . Subsequently, in cell B3 a range of