compare

I have a class A: class A { var identifier: String? var quantity: Int = 0 } Two arrays of A instances: var array1: [A] = [a1, a2, a3, a4] var array2: [A] = [a5, a6, a7, a8] I don't know which is the best way to check: array1==array2 if a1.identifier == a5.identifier, a2.identifier == a6.identifier, a3.identifier==a7.identifier, a4.identifier==a8.identifier in Swift. Please help me... Rahul Tripathi You can try like this: let result = zip(array1, array2).enumerated().filter() { $1.0 == $1.1 }.map{$0.0} Assume your data like that: struct Person { let name: String let id: Int } var people1 = [

I'm aiming to write a script that will compare each line within a file, and based upon this comparison, create a new file containing the lines of text which aren't in the second file. For example; **File 1:** Bob:20 Dan:50 Brad:34 Emma:32 Anne:43 **File 2:** Dan:50 Emma:32 Anne:43 The new output (File 3): Bob:20 Brad:34 I have some idea of how this needs to be done, but not exactly: def compare(File1,File2): with open(File1, "a") as f1: lines = f1.readlines() string = line.split(':') with open(File2, "a") as f2: lines = f2.readlines() string2 = line.split(':') if string[0] == string[1]: with

I ran up against unexpected behavior in pandas when comparing two series. I wanted to know if this is intended or a bug. suppose I: import pandas as pd x = pd.Series([1, 1, 1, 0, 0, 0], index=['a', 'b', 'c', 'd', 'e', 'f'], name='Value') y = pd.Series([0, 2, 0, 2, 0, 2], index=['c', 'f', 'a', 'e', 'b', 'd'], name='Value') x > y yields: a True b False c True d False e False f False Name: Value, dtype: bool which isn't what I wanted. Clearly, I expected the indexes to line up. But I have to explicitly line them up to get the desired results. x > y.reindex_like(x) yields: a True b True c True d

I'm working on a calendar/planner web app and I need to compare the start and end times of events before I store them in my DB. An event can only have a range of one day and between 8am and midnight. The start time always has to take place before the end time. The post values come from the form in the following format hh:mm:ss ( 12:14:00 ) etc.. so I can store them in my database without much hassle. Is there any way I can compare these times? Thanks a lot! If those times are in the database, comparison operator of the database would works. For example: SELECT * FROM table WHERE time < NOW()

I've got two Excel sheets where one sheets consists of a list of users. And the other list contains the same data, only the same user is listed several times. Now, I need some way of comparing the second list with the first one and delete the rows that contains a user that's not found in the first list. The first list looks like this: Paul Mccartney John Lennon George Harrison Ringo Starr The second list might look like this: Paul Mccartney Paul Mccartney Paul Mccartney John Lennon John Lennon John Lennon George Harrison George Harrison George Harrison Ringo Starr Ringo Starr Ringo Starr Ringo

Check to see if the array arr1 contain the same elements as arr2 in the same order in java. for example: isTheSame({"1", "2", "3"}, {"1", "2", "3"}) → true isTheSame({"1", "2", "3"}, {"2", "1", "1"}) → false isTheSame({"1", "2", "3"}, {"3", "1", "2"}) → false so far i have public boolean isTheSame(String[] arr1, String[] arr2) { if (arr1.length == arr2.length) { for (int i = 0; i < arr1.length; i++) { if (arr1[i] == arr2[i]) { return true; } } } return false; } The problem with this is that it only compares the first element of the two arrays. You are iterating until you find a match. You

I've an Oracle database with two schemas. One is old and another is new. I would like to update the old schema with the new columns of the new schema. I get the tables which have changes with the following query. select distinct table_name from ( select table_name,column_name from all_tab_cols where owner = 'SCHEMA_1' minus select table_name,column_name from all_tab_cols where owner = 'SCHEMA_2' ) With this query I get the tables. How can I update the old schema tables with the new columns? I don't need the data, just the columns. A schema comparison tool is a good idea. The database schema is