comparison

问题 I'd appreciate any pointers on how in SQL to check whether elements in one list also appear in another. List A = Live Customers in April List B = Live Customers in May How can I check which Customers in List A also appear in List B ? to identify those Customers which have been lost i.e. Customers in A but not in B. Thank you for your help. Gav 回答1: Different ways to pull the results SELECT customer FROM ListA a WHERE NOT EXISTS (SELECT 1 FROM ListB b WHERE a.customer=b.customer) OR SELECT a

问题 I'm about to launch an ASP.NET web site which will be running on a Linux server using Mono. First I would like to do some testing on my own machine. I have heard lots of info about Mono, but this is the first time I actually use it for a project. So far, I have only deployed my applications on IIS servers. I would like to get some information about the differences between the two, but most of the questions about Mono on StackOverflow are a bit dated. So, here are my specific questions: Which

问题 can map be compare with arraylist of string in java private Map<String, String> checkInScopeLobs(Map<String, String> allLobsChkBx) { Map<String, String> inScopeLobs = new HashMap<String, String>();; for (Map.Entry<String, String> entry : allLobsChkBx.entrySet()) { if(entry.getKey().contains("1") || entry.getKey().contains("2") || entry.getKey().contains("3")){ inScopeLobs.put(entry.getKey(), entry.getValue()); } } return inScopeLobs; } is this a correct way ? 回答1: You can make use of keySet()

问题 I have a library which contains all font characters (Arial in my case). For example: I'm using this library to OCR text from image. The problem is that when you try to OCR such characters as "j", "/", "t" - characters could overlap one another! So OCR is now impossible, because characters do not match pattern images (up to 3 pixels are different). How do I have to deal with this problem? Is there a better way to compare images? (C#, WinForms app) I'm using this method for comparison: unsafe

问题 I am trying to sort a list of paths by the distance it takes to complete them. The Prolog code I'm using is below. When I call sortRoutes , I get an existence error from Prolog saying that predsort doesn't exist. However, I am using the sort module and that doesn't seem to change anything. I can't seem to figure out why this isn't working. Am I doing anything wrong? Thanks! :- use_module(library(sort)). sortRoutes(DistRoutes, SortedRoutes) :- predsort(distCompare, DistRoutes, SortedRoutes).

问题 I am trying to sort a list of paths by the distance it takes to complete them. The Prolog code I'm using is below. When I call sortRoutes , I get an existence error from Prolog saying that predsort doesn't exist. However, I am using the sort module and that doesn't seem to change anything. I can't seem to figure out why this isn't working. Am I doing anything wrong? Thanks! :- use_module(library(sort)). sortRoutes(DistRoutes, SortedRoutes) :- predsort(distCompare, DistRoutes, SortedRoutes).

问题 So currently there is a comparison project I'm working on, and I am receiving a list back with the two classes of information I need to compare. I'm working on this project in C# and it is being displayed on a MVC web page. I'm newer to C# and completely new to web dev. I know I can write out one-by-one to compare the elements EX: List<ESHClass> eshlist; //This just to show that eshlist is of type ESHClass and i'm purposefully comparing two elements from the same list bool pNum = eshlist[0]

问题 I have two images. One is big and the other is small. I need an image comparison code/library which will search for the small one in the big one and give me the location and the percentage of the compared. Suggestions? 回答1: Emgu is opencv (open computer vision) in .Net. http://www.emgu.com/wiki/index.php/Main_Page This will have more than enough functionality to do what you are asking for. EDIT: I am assuming that C# is a key requirement. 来源： https://stackoverflow.com/questions/11004844/c

问题 While having one of my questions answered, cletus mentioned that when creating elements in jQuery it's better to use direct DOM element creation , instead of innerHTML . I tried googling it but I wasn't able to find a good article with comparisons. I've provided this code bellow as an example and I was wondering if someone could help me rewrite it in direct DOM element creation form in hope that i would also learn the difference afterwards. var img = $(this); img.append('<p class="cap"><a

问题 While having one of my questions answered, cletus mentioned that when creating elements in jQuery it's better to use direct DOM element creation , instead of innerHTML . I tried googling it but I wasn't able to find a good article with comparisons. I've provided this code bellow as an example and I was wondering if someone could help me rewrite it in direct DOM element creation form in hope that i would also learn the difference afterwards. var img = $(this); img.append('<p class="cap"><a