compare

I have two dataframes both of which have the same basic schema. (4 date fields, a couple of string fields, and 4-5 float fields). Call them df1 and df2 . What I want to do is basically get a "diff" of the two - where I get back all rows that are not shared between the two dataframes (not in the set intersection). Note, the two dataframes need not be the same length. I tried using pandas.merge(how='outer') but I was not sure what column to pass in as the 'key' as there really isn't one and the various combinations I tried were not working. It is possible that df1 or df2 has two (or more) rows

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 30/09/2012. It should also return query for the month of October Try with this. You can input date in dd/mm

Since Python 3.4, the Enum class exists. I am writing a program, where some constants have a specific order and I wonder which way is the most pythonic to compare them: class Information(Enum): ValueOnly = 0 FirstDerivative = 1 SecondDerivative = 2 Now there is a method, which needs to compare a given information of Information with the different enums: information = Information.FirstDerivative print(value) if information >= Information.FirstDerivative: print(jacobian) if information >= Information.SecondDerivative: print(hessian) The direct comparison does not work with Enums, so there are

Does anybody know of a tool that will compare two XML documents. Belay that mocking… there’s more. I need something that will make sure each node in file 1 is also in file 2 regardless of order. I thought XML Spy would do it with the Ignore Order of Child Nodes option but it didn’t. The following would be considered the same: <Node> <Child name="Alpha"/> <Child name="Beta"/> <Child name="Charlie"/> </Node> <Node> <Child name="Beta"/> <Child name="Charlie"/> <Child name="Alpha"/> </Node> You might want to google for " XML diff tool ", which will give you more than adequate results. One of them

I am trying to code the login process for an iPhone app in XCode. The problem is with the NSString serverOutput below. When I print it using printf(serverOutput.UTF8String); it prints 'Yes' to the console. However when I compare serverOutput to "Yes" it doesn't work. Any help would be appreciated. Here's my code: - (IBAction) loginButton: (id) sender { // TODO: spawn a login thread indicator.hidden = FALSE; [indicator startAnimating]; NSString *post =[NSString stringWithFormat:@"username=%@&password=%@",userName.text, password.text]; NSString *hostStr = @"http://10.243.1.184/connectDB.php?";

This question already has an answer here: Why is $false -eq “” true? 2 answers In powerShell you compare a boolean with a string with the "-eq" operator it will always return the same boolean as I used to compare. E.g. $shouldBeFalse = $true -eq "hello" $shouldBeTrue = $false -eq "hello" The variable $shouldBeFalse is $true. The variable $shouldBeTrue is $false. I had to use the "Equals" method: $shouldBeFalse = $true.Equals("hello") In this case $shouldBeFalse is $false. But why returns the -eq operator with boolean these kind of results? Matt PowerShell will always evaluate using the type of

I have two arrays. In each array I have objects with lots of properties but no methods. I need to see if array 1 is equal with array 2. One way to do that would be to create a function that pass through each element of an array and compare each property of the object with the object in the similar position in the second array. The problem is that the arrays are quite big and also each object has lots of properties. I was wandering if there could be another way. In C++ for example I could read memory... but I don't know how to do that in js. I need to obtain the most optimal way since this is

I have an NSArray containing numbers as NSString objects. ie. [array addObject:[NSString stringWithFormat:@"%d", 100]]; How do I sort the array numerically? Can I use compare:options and specify NSNumericSearch as NSStringCompareOptions ? Please give me an example/sample code. You can use the example code given for the sortedArrayUsingFunction:context: method which should work fine for NSStrings too as they also have the intValue method. // Place this functions somewhere above @implementation static NSInteger intSort(id num1, id num2, void *context) { int v1 = [num1 intValue]; int v2 = [num2

This question already has an answer here: How to compare 2 files fast using .NET? 18 answers 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 James Johnson Depending on how far you're looking to take it, you can take a look at Diff.NET Here's a simple file comparison function: // This method accepts two strings the represent two files to // compare. A return value of 0 indicates that the