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how does multiplication differ for NumPy Matrix vs Array classes?
The numpy docs recommend using array instead of matrix for working with matrices. However, unlike octave (which I was using till recently), * doesn't perform matrix multiplication, you need to use the function matrixmultipy(). I feel this makes the code very unreadable.
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C pointers : pointing to an array of fixed size
... with C language.
When the specifics of your application area call for an array of specific fixed size (array size is a compile-time constant), the only proper way to pass such an array to a function is by using a pointer-to-array parameter
void foo(char (*p)[10]);
(in C++ language this is also ...
How to add elements to an empty array in PHP?
If I define an array in PHP such as (I don't define its size):
8 Answers
8
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逆向工程——二进制炸弹(CSAPP Project) - 操作系统(内核) - 清泛网 - 专注...
...令，但最初我的出发点错了：完全依靠人工去读代码而不使用更便捷的gdb去调试和查看内存和寄存器的情况。
比方说，困扰了我好几天之久的strings_not_equal函数。现在看来，函数的名字已再清楚不过的体现了函数的意义。而我...
PDO Prepared Inserts multiple rows in single query
... according to this page it is faster than regular inserts.
$datafields = array('fielda', 'fieldb', ... );
$data[] = array('fielda' => 'value', 'fieldb' => 'value' ....);
$data[] = array('fielda' => 'value', 'fieldb' => 'value' ....);
more data values or you probably have a loop that...
std::vector versus std::array in C++
What are the difference between a std::vector and an std::array in C++? When should one be preferred over another? What are the pros and cons of each? All my textbook does is list how they are the same.
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How do I convert an object to an array?
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Single-dimensional arrays
For converting single-dimension arrays, you can cast using (array) or there's get_object_vars, which Benoit mentioned in
his answer.
// Cast to an array
$array = (array) $object;
// get_object_vars
$array = get_...
How to find the 'sizeof' (a pointer pointing to an array)?
...t know what the pointer is pointing to. There are tricks, like ending the array with a known out-of-band value and then counting the size up until that value, but that's not using sizeof().
Another trick is the one mentioned by Zan, which is to stash the size somewhere. For example, if you're d...
How can I remove a key and its value from an associative array?
Given an associative array:
6 Answers
6
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Explanation of [].slice.call in javascript?
...mbled onto this neat shortcut for converting a DOM NodeList into a regular array, but I must admit, I don't completely understand how it works:
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