Passing the session source to a hidden field of an unbounce form

It works fine if you go directly to to the form with a campaign link. But if you go to the website first and then click the button to get to the form – the source is gone from the url and so doesn’t get added to the field.

I came up with a solution that rewrote the button link on dom load to append with a new parameter name whatever campaign parameters they arrive with. However – that will only work if they land on one page and go to the form. I could keep making the tag more complicated to cover more situations and that might be the right path.

But I would like to know if there is an easier solution at the source by adding a tag that only triggers when the form loads and pulls the referrer or utm_source and puts it into the hidden field.

Does this make sense what I’m trying to do?

Thank you

McNaughton-Yamada Algotihm (1960) Regular Expression to DFA without passing through NFA

I have a homework problem here. It asks me to use the McNaughton-Yamada algorithm to first convert a regular expression to a DFA, and then minimize this using a partition argument. I can do the latter. My problem is that I cannot access any actual reference on the algorithm. Their original paper is behind a paywall at IEEE that my university does not have access to.

The algorithm went something like this: 1. For each symbol in the expression, given them a subscript from left to right increasing by one for each instance of that symbol. For example, the expression, aa* would receive a_1 a_2^*.

  1. We proceed to construct a diagram based on the possible lengths of words.

If done appropriately, this produces a DFA. I think the labeling in (1) is to help label the states.

Feel free to come up with your own example if you decide to give an answer. I won’t provide any problem here because there is no guarantee that it isn’t actually my homework exercise.

What’s the point of passing by value?

I am being told that I need to make the definitions of the int and the string up in the above function then pass by value. Why won’t my way work however?

void boardFunc(Game &game) {      game.board.numSquares = totSquare();  }  int totSquare() {      int tot = 0;     string what = "";      ifstream readBrd;     readBrd.open("board.txt");      readBrd >> what;     readBrd >> tot;      cout << what;      return tot;  } 

Passing a non-mutable argument by value or by reference?

A function can generally be defined to receive parameters by value or by reference. If we want to mutate an object inside the function and have those changes reflected outside the function, then it must be passed by reference.

If we don’t want to mutate the object then we can choose between passing by value or by reference. The choice, in my experience, is based on whether or not it’s expensive to copy the object. If it’s cheaper to copy than to deal with the reference’s indirection – pass by value, else – pass by reference.

1) Are there any other considerations that should be taken into account?

2) Wouldn’t a compiler be better suited to make this choice instead of the programmer? Why, or why not?

To illustrate question 2, the programmer could simply indicate whether they intend to mutate an argument or not. If an argument will be mutated then it must be passed by reference. If it won’t be mutated, then the compiler can choose between passing by value or by reference – whichever is faster.

3) Do you see any pitfalls in this approach to language/compiler design?

Suggestions for show how many days? Passing the International Date Line

Little background Let’s say you fly from the United States to Japan and suppose you leave the United States on Tuesday morning. Because you’re travelling west, the time advances slowly thanks to time zones and the speed at which your aeroplane flies. But as soon as you cross the international dateline, it’s suddenly Wednesday.

Below image from google flight, which is +2 means taking 2days gap. this +2 doesn’t make a sense for me.

enter image description here

Getting error>: ‘invalid use of non-static member function’ when passing a child class method to a father (public-inherited) method

Hope everybody is doing just fine.

I’m writing this piece of code where i have a class called XZStage (child) that inherits every public method from the library/class SerialCommand (father) and on a method of the XZStage i’m passing to a father method, a child method as argument.

The error i’m getting is: ‘invalid use of non-static member function’

A little piece of advice to do a refined search would be great.

Passing Function Calls vs. Values as Arguments

I tried writing code for a program that evaluates an inline expression using an operand stack (nstack) and an operator stack (ostack):

#include<stdio.h> #include<stdlib.h> #include<string.h> int nstack[10]; //the operand stack char ostack[10] = "E"; //the operator stack with 'E' as the sentinel int ntop = -1; //top value of operand stack int otop = 0;  //top value of operator stack  //Function Declarations void opush(char op); int npop(); void npush(int a); int opop(); char o; int precedence(char op); void evaluate(); void tokenizer(char c); int result(int j, char o, int i); //Calculates the result of i (o) j  void npush(int a){ //Operand Push     nstack[++ntop] = a; }  int npop(){ //Operand Pop     return nstack[ntop--]; }  int opop(){ //Operator Pop     return ostack[otop--]; }  void opush(char op){ //Operator Push     while (precedence(op) <= precedence(ostack[otop])){             //keep popping the operator(s) and evaluate their results (while the operands are being popped as well) until the condition turns false              int x = npop(); int y = npop(); char o = opop();              // **************LINE 1*******************             npush(result(x, o, y));               *************LINE 2***********************             //npush(result(npop(), opop(), npop()));      }     ostack[++otop] = op;  }  int precedence(char op){ //function 5     if(op == '+' || op == '-')         return 1;     else if (op == '*' || op == '/')         return 2;     else          return 0; //sentinel case }  int result(int x, char o, int y){ //for an operation y op x i.e. reverse order     switch(o){         case '+': return y + x;         case '-': return y - x;         case '*': return y * x;         case '/': return (y / x);     } }  void stackInput(char c){ //Pushes operators to ostack and operands to nstack     int val = c - '0';      //if an integer     if (val >= 0 && val < 10){          npush(val);     }      //else, an operator     else{          opush(c);     } }  void evaluate(){     while(otop!=0){         int x = npop(); int y = npop(); char o = opop();         npush(result(x, o, y));         //npush(result(npop(), opop(), npop()));     } }   void main() {     char expr[10] = "8/1/2";     int i;     for (i = 0; i< strlen(expr); ++i){     stackInput(expr[i]);     } evaluate(); printf("Result = %d", nstack[0]); } 

When I run the code by using function calls as arguments for the function result(), I get a floating point exception. On the other hand, when I save the popped values in separate variables and pass them as arguments to result(), I do get the expected output.

I would appreciate if someone could explain the anomaly. Generally, we would expect the values to be passed in order (which I came to realize doesn’t happen when I passed function calls and tried printing the received values).

Forgive me if this question is off-topic here. I believe it isn’t since the question is about what happens inside during execution.