CONTEXT I’m creating a calculator. I’m at the point where I want my calculator to do BODMAS (start calculations with the inner most bracket). The user enters an expression, in this example it is: expression = (1+(1+1)) I have a function that splits up this function into ‘terms’ and saves the result in expression_list. expression_list… Read More Dictionary Assignment Not Functioning As Intended

I am trying to display a Form Widget 2ithin a Dialog as following: onPressed: () async { switch (currentScreen.toString()) { case ‘OverviewScreen’: () => showDialog( context: context, builder: const Dialog(child: FormBasicDetails())); break; } }, But I get the following error at the builder line: The argument type ‘Dialog’ can’t be assigned to the parameter type… Read More The argument type 'Dialog' can't be assigned to the parameter type 'Widget Function(BuildContext)'

Can someone help me while writing an assignment? It is necessary to create a template for creating objects of the Student type. Each Student should have the following properties: It is necessary to create a template for creating objects of type Student. Every student should have the following characteristics: name, address, phone, course, index_number. Each… Read More Problem with writing an objective oriented python assignment

I’ve spent some time trying to understand some C++ code, and I have background in C and Java. The code in question used what looked to be shorthand of some kind that I didn’t recognize or understand for some time. I know now that they were using assignment constructors to assign variables, something that doesn’t… Read More What's the difference between using an Assignment Constructor vs. normal assignment here?

Consider this task : With a one line command save all usernames transformed into CAPITALS in a bash array called USERNAMES. Capitalize using bash variable expansion. If not for the the one line limitation, I would just use USERNAMES=($(ls /home)) # simplified for purposes of this question, returns (user1 user2 …) USERNAMES=(${USERNAMES[*]^^}) # must return… Read More Expand the output of the command and only then assign it to a variable

I have an variable: $a = sfd. If I use New-Item ‘1’$a, then it will yield this error: New-Item: A positional parameter cannot be found that accepts argument ‘sdf’. But if I use New-Item "1$a" then it works. According to How do I concatenate strings and variables in PowerShell? both two methods should work. Do… Read More Why does using single quotes with variables yield error "A positional parameter cannot be found that accepts argument"?

I am solving Leetcode problem #94 for in-order traversal of a binary tree. I cannot understand why – when I use &cpy (currently commented) when calling helper() the program works correctly but not when I use &gResult. int countNode(struct TreeNode* root) { if(root) return 1 + countNode(root->left) + countNode(root->right); return 0; } void helper(struct TreeNode*… Read More Pass pointer to pointer behaves weird

For example I have next code: name = str(‘John Doe’) Let’s imagine after I assign to name = 1, but code still valid. Is it possible to get an error in this case in Python or within some special tool? >Solution : Python is dynamically typed, so you can assign pretty much anything to anything.… Read More Is it possible to get an error when accidentally assigned wrong type in python?

I have two arrays A and B both with the same elements { 1, 2, 3, 4 } but after doing A[B[i]] = A[i] + 1 array B is getting populated with different number but in reality it should be unchanged. #include <stdio.h> void arrayPrint(int *arr, int size) { for (int i = 0; i… Read More Weird behavior with C array