compare

问题 I am storing my dates in column server_date_time in varchar in dd/mm/yyyy format and i want to fetch the records lying between some dates so i have used the query select * from activity_emp where date_format(str_to_date(substr(server_date_time,1,10),'%d/%m/%Y'),'%d/%m/%Y')>= '29/09/2012' and date_format(str_to_date(substr(server_date_time,1,10),'%d/%m/%Y'),'%d/%m/%Y')<= '07/10/2012'; I have converted varchar to string in query but my query return query data only related to 29/09/2012 and 30

问题 What can be the fastest way to to check the duplicate values in the dictionary and print its key? Dictionary MyDict which is having following values, Key Value 22 100 24 200 25 100 26 300 29 200 39 400 41 500 Example: key 22 and 25 have same values and i need to print that 22 and 25 have duplicate values. 回答1: It depends. If you have an ever changing dictionary and need to get that information only once, use this: MyDict.GroupBy(x => x.Value).Where(x => x.Count() > 1) However, if you have a

问题 This question already has answers here : How to compare 2 files fast using .NET? (18 answers) Closed 4 years ago . I want to compare two files in C# and see if they are different. They have the same file names and they are the exact same size when different. I was just wondering if there is a fast way to do this without having to manually go in and read the file. Thanks 回答1: Depending on how far you're looking to take it, you can take a look at Diff.NET Here's a simple file comparison

问题 I need a tool to compare the design of a website, I do not want to compare the HTML code only, but the output design. Is this even possible? also is there any opensource program of this kind? I have searched google, but I only get one candidate so far which is an HTML Match. 回答1: In modern webpages the appearance is controlled by various 'things': html code, css styles and images at least (also javascript in some pages). Simple text-based diff programs are not enough because their output can

问题 How do I compare two excel sheet and determine which column is missing? (I would like to compare a list of countries from sheet A with sheet B, then mark which country is missing) Note: They are in random order. 回答1: You can use the VLOOKUP function in an Excel worksheet to help finding "missing" data in a different sheet. For example, take the following two worksheets: Sheet1 ------ A B C 1 aa 2 bb 3 cc 4 dd . Sheet2 ------ A B C 1 aa 2 bb 3 dd Add the following formula to cell B1 in Sheet

问题 I'm somewhat new to Git and what I'm trying to do seems like it should be possible. Basically I've been working off of clone of a repo and have made quite a few local commits. Is there a way to see the diff of the 'sum' of all my changes and the original repo version? I would assume this would be possible because Git will essentially do this when I do a push . Here is an example of what I'm trying to do: in gitk I will see something like this: * - [mybranch] Added '42' to end of answers.txt

问题 When I test this code: java.util.Date date = new java.util.Date(); java.util.Date stamp = new java.sql.Timestamp(date.getTime()); assertTrue(date.equals(stamp)); assertTrue(date.compareTo(stamp) == 0); assertTrue(stamp.compareTo(date) == 0); assertTrue(stamp.equals(date)); I´ll be expecting a true, true, true, false. Because of this: In the javadoc for java.sql.Timestamp, it states: Note: This type is a composite of a java.util.Date and a separate nanoseconds value. Only integral seconds are

问题 I am comparing text files in junit using: public static void assertReaders(BufferedReader expected, BufferedReader actual) throws IOException { String line; while ((line = expected.readLine()) != null) { assertEquals(line, actual.readLine()); } assertNull("Actual had more lines then the expected.", actual.readLine()); assertNull("Expected had more lines then the actual.", expected.readLine()); } Is this a good way to compare text files? What is preferred? 回答1: junit-addons has nice support

问题 I want to compare two binary files. One of them is already stored on the server with a pre-calculated CRC32 in the database from when I stored it originally. I know that if the CRC is different, then the files are definitely different. However, if the CRC is the same, I don't know that the files are. So, I'm looking for a nice efficient way of comparing the two streams: one from the posted file and one from the file system. I'm not an expert on streams, but I'm well aware that I could easily

问题 How to compare time in Objective C? if (nowTime > 9:00 PM) && (nowTime < 7:00 AM) { doSomething; } 回答1: If you want to get the current hour and compare it to some times, you're going to have to use NSDate , NSDateComponents , and NSCalendar . NSDateComponents *components = [[NSCalendar currentCalendar] components:NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:[NSDate date]]; NSInteger currentHour = [components hour]; NSInteger currentMinute = [components minute];