[Solved] Flutter – Is there any way to change variable value without using setState() or notifyListeners()

use stream.it is like a pipe you add value from a side (Sink) and recieve it on the other side (Stream).i will try to explain it: //make a stream controller StreamController<bool> valueController = StreamController(); //this will listen to every new value you add Stream valueOutput = valueController.stream; //you can add new values throw the sink … Read more

[Solved] I don’t know how to do

Don’t use the names of existing types as namespaces. You have a custom namespace here: namespace UnityStandardAssets.Characters.ThirdPerson.NavMeshAgent So anything within that namespace (or in code which references the enclosing namespace) which refers to NavMeshAgent will be referring to the namespace. Not to the type in Unity. Rename your namespace. For example: namespace UnityStandardAssets.Characters.ThirdPerson.MyNavMeshAgent (Or something … Read more

[Solved] PEP 8 warning “Do not use a lambda expression use a def” for a defaultdict lambda expression [duplicate]

A lambda in Python is essentially an anonymous function with awkward restricted syntax; the warning is just saying that, given that you are assigning it straight to a variable – thus giving the lambda a name -, you could just use a def, which has clearer syntax and bakes the function name in the function … Read more

[Solved] Join columns of the same data.frame

df <- setNames(data.frame(matrix(, nrow = 100, ncol = 2)), c(“V1”, “V2”)) df$V1 <- “a, b, c, d, e” df$V2 <- “b, c, a, b, e” df$V3 <- paste(df$V1, df$V2, sep = “, “) Hope this helps. solved Join columns of the same data.frame

[Solved] Segmentation Fault C++ pointers [closed]

Your code is no C++ code. Except file operations it is (bad styled) C code. You are using a plain array (cells), you even do an unnecessary copies of the array (root) and that pointer arithemtic is dangerous (as you are currently experiencing). I think you should rewrite your code a bit which will solve … Read more

[Solved] Is there a way to identify the Windows command prompt regardless of file name or location?

Don’t. Windows has internal means for that. Read up on the policy editor, and/or file access control. If you’re admin and the “user” is not, policy (or simple ACL) will do the job; if the “user” is also an admin, they’ll be able to defeat your program fairly easily. 4 solved Is there a way … Read more

[Solved] calling method in c++ [closed]

int operation(int op, int n1, int n2) { switch( op ) { case 1: return subtraction(n1, n2); case 2: return multiplication(n1, n2); default: // default case, when the op value is neither 1 or 2 cout << “Error! << endl; return 0; } } @Edit: Added default case as suggested below. Also, I think that … Read more

[Solved] How do I insert the value from a checkbox into MySQL in php? [duplicate]

First of all I would change these <form method=”post”> <input type=”hidden” name=”blah” value=”blah”> <input type=”checkbox” name=”cbox[]” value=”1″> <input type=”checkbox” name=”cbox[]” value=”1″> <input type=”checkbox” name=”cbox[]” value=”1″> <input type=”checkbox” name=”cbox[]” value=”1″> <input type=”checkbox” name=”cbox[]” value=”1″> <button type=”submit”>Submit</button> </form> As you wont be able to tell severside which one is checked currently you’ll get something like this if … Read more