I know that C++ holds memory management internally with a lot of given points, and I know of the delete command to remove dynamically allocated data, and this question, could seem pointless within the fact that it may not ever come to be an issue due to the destruction of variables outside of the scope of the function that is using them, but is it possible to use a function such like delete to remove a variable that the user is no longer putting to use. Like say that you are on a heavily memory depleted piece of hardware, and need to make sure that even something as small as the 4 bytes that an integer normally takes up are given straight back. Is it possible to do this without wrapping the variable inside some function to make the assembler know to remove it immediately? This is in a sense of a point that I don't believe could ever happen, due to the expansion of memory, and the ways that it could be manipulated these days, but it seems as if it may have been an issue before, if I'm not mistaken.  Summary: Is there a way to manage non dynamic data directly, allocate it to the stack, and remove it from the stack through a function call, or is this completely run by the programs internal instructions?  Example:  void foo(){    short int operator;   /*Did what needed to be done with the operator variable***********/   //Pseudo-code     delete operator;    /*Even though it was not allocated dynamically,     and with the use of another function call*/ }
Ignoring programming style and design, is it "safe" to call delete on a variable allocated on the stack?  For example:     int nAmount;    delete &amp;nAmount;   or  class sample { public:     sample();     ~sample() { delete &amp;nAmount;}     int nAmount; }
Computational complexity of Fibonacci Sequence I understand Big-O notation, but I don't know how to calculate it for many functions. In particular, I've been trying to figure out the computational complexity of the naive version of the Fibonacci sequence:  int Fibonacci(int n) {     if (n &lt;= 1)         return n;     else         return Fibonacci(n - 1) + Fibonacci(n - 2); }   What is the computational complexity of the Fibonacci sequence and how is it calculated? mkdir -p for files How do I set a monitor resolution that is not available in the Display Settings dialog? Characterize the groups $G$ for which the map $\iota: G \to G$, sending $x \mapsto x^{-1}$ for all $x \in G$, is an automorphism of $G$ I have trouble on this question: "Characterize the groups G for which the map $$\iota: G \to G$$ sending $$x \mapsto x^{-1}$$ for all $x \in G$, is an automorphism of $G$." From  post I have seen that $G$ must be abelian. Can anyone propose another characteristic of $G$ that I can derive from the given conditions besides abelian? Thank you so much!! Match-3 algorithm to fill empty space left from removing matches I am currently creating a match 3 game.   I am at the point where I have objects dropping down in the column when only one item is removed. So if an item is removed, the above item moves into its old position etc.  The problem I am having now is that when more than one item is removed from a column, the items in that column only drop down to the first item that was removed. Instead of filling in both items that were removed it just drops down to fill in the first one.   So basically, if two(or more) items are removed from a column the second, third, fourth, etc positions are left blank.  The way I am designing my game is I am using units of 1. So each item takes up 1 unit by x and 1 unit by y. This means that I can position the items like in a grid, at 0x1, 0x2, etc.   What kind of algorithm could I use to move multiple items down to fill the empty space? If moderators can view , can we see comments we've deleted? We can see our deleted answers, but why not our deleted comments? How to prove $\int_{-\infty}^{+\infty} f(x)dx = \int_{-\infty}^{+\infty} f\left(x - \frac{1}{x}\right)dx?$ If $f(x)$ is a continuous function on $(-\infty, +\infty)$ and $\int_{-\infty}^{+\infty} f(x) \, dx$ exists. How can I prove that $$\int_{-\infty}^{+\infty} f(x) \, dx = \int_{-\infty}^{+\infty} f\left( x - \frac{1}{x} \right) \, dx\text{ ?}$$ Simple Past vs. Present Perfect: "was" vs. "has been" Second order partial of $f(x,y)=\frac{xy(x^2-y^2)}{x^2+y^2}$ Consider the function $f(x,y)=\dfrac{xy(x^2-y^2)}{x^2+y^2}$ for $(x,y) \neq (0,0)$, $f=0$ otherwise.  I have to compute $\dfrac{d^2f}{dydx}(0,0)$.  I know that I have to calculate $\frac{df}{dx}$ first. But that is ,  $\frac{df}{dx} = \frac{\partial f}{\partial y}\frac{dy}{dx}+\frac{\partial f}{\partial x}$. When I put it in wolframalpha, it gives me this calculation, and also just $\frac{\partial f}{\partial x}$ as an alternative form.   Why do I just ignore the y'? I don't know what y(x) is, as a function of x.  y and x are independent functions, no? Find unique rows in numpy.array Is abstract algebra (mostly?) restricted to $2$-ary operators? I use Internet Explorer for some things and Chrome for others. I'd like to have a choice when I click on a link of which browser to open the link in. Is this possible in Windows? I am currently running Windows 8, although there should be similarities between versions.  To the best of my knowledge this isn't possible. Libraries module. Where to extract? How to disable the "Get Windows 10" icon shown in the notification area (tray)? This icon showed up in my taskbar notification area today and I cannot seem to get rid of it:    Clicking on it displays the following screen:    So how do I disable or remove the "Get Windows 10" icon? Formal Proof that area of a rectangle is $ab$ I tried to prove that the area of a rectangle is $ab$ given side lengths $a$ and $b$.  The best I can do is the assume the area of a $1\times1$ square is $1$. Then not the number of $1\times1$ squares that fit in an $a\times b$ rectangle is $ab$. Therefore area is $a\cdot b$. This does not seem rigorous however. With "magic quotes" disabled, why does PHP/WordPress continue to auto-escape my POST data? Is selenium webdriver capable of database testing? After reading so many answers and forums it makes me confused. Some people say: Selenium webdriver is a browser automation tool and it has nothing to do with the database. And some other showing JARs and code that how we can connect selenium to the database and we can test database using selenium webdriver. So I would really like to know if we can do database testing using selenium? If yes then which databases tool it supports like Mysql, SQL server, Oracle... And if selenium is not suitable for database testing then please recommend to me the best tool for database testing. Can a 20V 4.51A power supply be used with a computer that requires a 19V 3.42A power supply? Adverb between conjugated verb and infinitive? The judicial function in considering and applying statutes is one of interpretation and interpretation alone. The duty of the court in every case is loyally to endeavour to ascer­tain the intention of the legislature; and to ascertain that intention by reading and interpreting the language which the legislature itself has selected for the purpose of expres­sing it.    1. What's this phenomenon called? Is this placement unusual or due to  my English's primitiveness?  2. Why not situate the adverb after 'endeavour', or even split the infinitive 'to endeavour' and wedge it in between?  What are the similarities and differences due to a different position? How do I install drivers for an Intel HD Graphics? In System Info in 11.10, the graphics driver wasn't detected. I use ACER Aspire 4750 with Intel Core i3-2340M and Intel HD Graphics 3000 graphic card  How to install the driver for my Ubuntu?