Kirat This was discussed on Stackoverflow using Time::Piece. One of the answers comes close to calculating days hours minutes. From what I’ve read about this question before, I think you can easily code it up like this: sub dhms { my $seconds = shift; my $days = int $seconds / 86400; $seconds %= 86400; my $hours … Read more
No. == compares the references. this means == compares where in the memory the object is saved. hashCode() creates an integer from the attributes of an Object (the algorithm for this operation may vary from class to class). Comparison of objects should be done via o1.equals(o2). 2 solved what is hash code and how it … Read more
Have a look on the option “-o” (–only-matching) of grep command. By default grep keep lines that match the given pattern. With the option ‘-o’, grep will keep only the part of the line that match your url pattern 0 solved How to create list of jpg urls from file?
I guess I found the solution. At least, I found the answer I need. Here is my answer import java.math.BigInteger; public class Problem7 { public static void main(String[]args) { int i = 0; int counter = 0; while(true) { if(i>6) { break; } if(i>1) { String str = String.valueOf(i); if (new BigInteger(str).isProbablePrime(i/2)) { System.out.println(str); counter++; … Read more
There is also the whiptail command, if you only want to write a shell script (as the debian installer is). There is a good page of it in the Bash Shell Scripting Book on WikiBooks: https://en.wikibooks.org/wiki/Bash_Shell_Scripting/Whiptail solved How to create simple command line UI like the debian installer? [duplicate]
Android apps run properly even without extending it. Android apps can run properly without extending it. They can run properly without extending Activity. You extend Application when it does something useful for you. Can anyone explain this scenario as why exactly do we extend it. It is used for per-process initialization that should always happen, … Read more
This can be solved in Dynamic Programming (DP) by following the recursive formula: D(x) = INFINITY x < 0 D(0) = 0 D(x) = min{ D(x-1), D(x-15), D(x/2) } + 1 In bottom-up DP it will be something like: (pseudo code) D = new int[151] D[0] = 0 for (int i = 1; i <151; … Read more
You can do this simply by cascading the the cin operator. If you write a code in this way: int a,b; cout << “Enter value of a” << endl; cin >> a; cout << “Enter value of b” << endl; cin >> b; then the program execution would be in this way: Enter value of … Read more
$query = “SELECT * FROM ‘users’”; <?php $servername = “localhost”; $username = “username”; $password = “password”; $dbname = “myDB”; // Create connection $conn = new mysqli($servername, $username, $password, $dbname); // Check connection if ($conn->connect_error) { die(“Connection failed: ” . $conn->connect_error); } $sql = “SELECT * FROM users”; $result = $conn->query($sql); if ($result->num_rows > 0) { … Read more
You can use OS redirection operators java Test < inputFile > outputFile then this public class Test { public static void main(String[] args) throws IOException { for(int i; (i = System.in.read()) != -1;) { System.out.write((byte)i); } } } will copy from inputFile to outputFile 7 solved Give standard input to program through files and take … Read more
you’re really supposed to ask questions in the context of an issue you’re having with your existing code and functionality.. not a design feature or tutorial based question. With that said, I’m going to provide an answer and code sample to this because I like to introduce developers (and more particular, DBAs) to bitwise operations. … Read more
Give this a shot: (\b999\d), Your matches will be saved to the capture group. If you only want 999x, and not 999xx, this is going to work because of the , at the end. Test it out here -> https://regex101.com/r/yU2oN0/2 solved What would be the regular expression to match the specific pattern string. i.e : … Read more
The issue is that openpyxl doesn’t evaluate the formula in excel. it will only return the last value saved by excel or ‘None’ (with data_only=True). The latter is what is happening when you change an input cell and use [cell].value to call the value of the cell with the formula. When you don’t change the … Read more
Constructor create object in memory only, and once your app is closed or pc shutdown your data will be lost, store data in a file is useful to store application settings, you have to use an xml or a properties file. If you want to store your business or other data in a database, you … Read more
Hmmm Some task… Do one thing create a pointer of that class in your cpp file and assign memory to it using heap allocation. class *myfield = (class*)malloc(no_of_instances*sizeof(class)) Now use that object which is there in your header file assign myfield’s address to that object(hope that is pointer) Now it should work fine.. try and … Read more