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- c - why is *pp[0] equal to **pp - Stack Overflow
For example, int i, j=0; i=j; effectively dereferences j; j is an address constant, and the assignment concerns the value stored there, j's value, so that the assignment amounts to i=0 Other languages, like Algol68, were more precise: one would effectively write int i; int *pi = i; , which makes complete sense (pi now points to i)
- Is $0$ a natural number? - Mathematics Stack Exchange
Inclusion of $0$ in the natural numbers is a definition for them that first occurred in the 19th century The Peano Axioms for natural numbers take $0$ to be one though, so if you are working with these axioms (and a lot of natural number theory does) then you take $0$ to be a natural number
- What is the difference between 0. 0. 0. 0, 127. 0. 0. 1 and localhost?
0 0 0 0 has a couple of different meanings, but in this context, when a server is told to listen on 0 0 0 0 that means "listen on every available network interface" The loopback adapter with IP address 127 0 0 1 from the perspective of the server process looks just like any other network adapter on the machine, so a server told to listen on 0
- factorial - Why does 0! = 1? - Mathematics Stack Exchange
$\begingroup$ The theorem that $\binom{n}{k} = \frac{n!}{k!(n-k)!}$ already assumes $0!$ is defined to be $1$ Otherwise this would be restricted to $0 <k < n$ A reason that we do define $0!$ to be $1$ is so that we can cover those edge cases with the same formula, instead of having to treat them separately
- What is IPV6 for localhost and 0. 0. 0. 0? - Stack Overflow
The 0 0 0 0 and :: addresses are reserved to mean "any address" So, for example a program that is providing a web service may bind to 0 0 0 0 port 80 to accept HTTP connections via any of the host's IPv4 addresses These addresses are not valid as a source or destination address for an IP packet
- What is the difference between NULL, \0 and 0? - Stack Overflow
NULL is not guaranteed to be 0 -- its exact value is architecture-dependent Most major architectures define it to (void*)0 '\0' will always equal 0, because that is how byte 0 is encoded in a character literal I don't remember whether C compilers are required to use ASCII -- if not, '0' might not always equal 48
- complex analysis - What is $0^{i}$? - Mathematics Stack Exchange
$$\lim_{n\to 0} n^{i} = \lim_{n\to 0} e^{i\log(n)} $$ I know that $0^{0}$ is generally undefined, but can equal one in the context of the empty set mapping to itself only one time I realize that in terms of the equation above, the limit does not exist, but can $0^{i}$ be interpreted in a way to assign it a value?
- What does javascript:void (0) mean? - Stack Overflow
The void operator is often used merely to obtain the undefined primitive value, usually using “void(0)” (which is equivalent to “void 0”) In these cases, the global variable undefined can be used instead (assuming it has not been assigned to a non-default value)
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