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How does PHP 'foreach' actually work?
...e prefix this by saying that I know what foreach is, does and how to use it. This question concerns how it works under the bonnet, and I don't want any answers along the lines of "this is how you loop an array with foreach ".
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Pointer expressions: *ptr++, *++ptr and ++*ptr
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Here's a detailed explanation which I hope will be helpful. Let's begin with your program, as it's the simplest to explain.
int main()
{
const char *p = "Hello";
while(*p++)
printf("%c",*p);
return 0;
}
The first statement:
const char* p = "Hello";
declares p as a pointer...
Node.js or Erlang
I really like these tools when it comes to the concurrency level it can handle.
9 Answers
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How to initialize std::vector from C-style array?
What is the cheapest way to initialize a std::vector from a C-style array?
6 Answers
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...r if the program name is not available from the host environment.
So no, it's only the program name if that name is available. And it "represents" the program name, not necessarily is the program name. The section before that states:
If the value of argc is greater than zero, the array members...
Is there a CSS parent selector?
...no way to select the parent of an element in CSS.
If there was a way to do it, it would be in either of the current CSS selectors specs:
Selectors Level 3 Spec
CSS 2.1 Selectors Spec
That said, the Selectors Level 4 Working Draft includes a :has() pseudo-class that will provide this capability. It...
What is the difference between a URI, a URL and a URN?
...form Resource Locator" (URL) refers to the subset of URIs
that, in addition to identifying a resource, provide a means of
locating the resource by describing its primary access mechanism
(e.g., its network "location"). The term "Uniform Resource Name"
(URN) has been used histori...
What's the best way to do a backwards loop in C/C#/C++?
...
While admittedly a bit obscure, I would say that the most typographically pleasing way of doing this is
for (int i = myArray.Length; i --> 0; )
{
//do something
}
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Comparison between Corona, Phonegap, Titanium
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I registered with stackoverflow just for the purpose of commenting on the mostly voted answer on top. The bad thing is stackoverflow does not allow new members to post comments. So I have to make this comment more look like an answer.
Ror...
What are the recommendations for html tag?
...r seen <base> HTML tag actually used anywhere before. Are there pitfalls to its use that means I should avoid it?
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