Month: September 2022

[Solved] Referencing to a pointer member in a different class

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As the compiler is telling you, this line: Note n = Note(&track.generator); Tries to construct a Note and supply a Generator** to its constructor (since track.generator has type Generator*, &track.generator has type Generator**). However, your Note class constructor accepts a Generator*, not a Generator**. Just do this instead (notice, that copy-initialization is unnecessary here, rather … Read more

[Solved] Only allowing numbers to be taken from user input in java

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Inside your while loop use the following code: System.out.print(“Enter the test score: “); while (!keyboard.hasNextInt()) {//Will run till an integer input is found System.out.println(“Only number input is allowed!”); System.out.print(“Enter the test score: “); keyboard.next(); } int tS = keyboard.nextInt(); //If input is a valid int value then the above while loop would not be executed … Read more

[Solved] Inserting months and updating it with Amount

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Here’s an example script on how to do it as I explained in the comments before. All you have to do is adept your database and output to it: <?php $costs = 180; //Total costs $month_costs = 30; //Costs per month $paid = 80; //Paid first & second month + 10 dollar / euro extra … Read more

[Solved] Python: Break statements for while blocks

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I guess you are new to programming and this may be one of your very first codes. It would be great if you start by learning syntax of programming language which you have decided to use as well as working of loops, return statements, etc. I personally preferred reading any basic programming language book. For … Read more

[Solved] Find the mean for every selected rows in R from csv file [closed]

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We can use lapply to loop over the columns of dataset, then created a grouping variable with %/% and get the mean using tapply lapply(df1, function(x) tapply(x, (seq_along(x)-1)%/%128, FUN = mean, na.rm = TRUE)) data set.seed(24) df1 <- data.frame(col1 = sample(c(NA, 1:10), 140, replace=TRUE), col2 = sample(c(NA, 1:3), 140, replace=TRUE)) 8 solved Find the mean … Read more

[Solved] how to use ‘GROUP BY’ function with below query

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Do you mean like this? SELECT * FROM ( SELECT a.id, a.name, c.code, a.active_dt, a.inactive_dt, b.category, COUNT(1) OVER(PARTITION BY a.id, a.name, c.code) AS CNT FROM student a, class b, descrip c WHERE a.id=b.id AND a.id=c.id ) WHERE CNT > 1 0 solved how to use ‘GROUP BY’ function with below query

[Solved] How to wait core data add functions step by step in swift 3

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try using completion handler for your function or may try Operation queue with dependency to wait coreDataAdd (where : “User”, onCompletion: { (isFinished) in if isFinished { coreDataAdd (where : “Profile”, onCompletion: { (isFinished) in if isFinished { coreDataAdd (where : “Profile”, onCompletion: { (isFinished) in if isFinished //Here segue to the next view let … Read more

[Solved] Using a for loop in C# to calculate the average of a array of 10 numbers [closed]

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using System; class Program { static void Main(string[] args) { string[] cijfers = new string[10] { “7”, “8”, “4”, “6”, “5.5”, “7.5”, “2”, “3.3”, “4.9”, “8.9” }; int i = 0; double sum=0; for (i = 0; i < 10; i++) { sum+=double.Parse(cijfers[i]); Console.WriteLine(“The sum is: {0}”,sum); } Console.Write(“The average is: {0}”,sum/10); } } solved … Read more