What's the safest way to iterate through the keys of a Perl hash?

What's the safest way to iterate through the keys of a Perl hash?

If I have a Perl hash with a bunch of(key, value) pairs, what is the preferred method of iterating through all the keys? I have heard that using each may in some way have unintended side effects. So,…


PHP array indexing: $array

What is the difference, if any, between these methods of indexing into a PHP array: $array[$index] $array["$index"] $array["{$index}"] I'm interested in both the performance and functional difference…


How can I merge PHP arrays?

I have two arrays of animals(for example). $array=array( array( 'id'=> 1, 'name'=> 'Cat',), array( 'id'=> 2, 'name'=> 'Mouse',)); $array2=…


Iterating over a complex Associative Array in PHP

Is there an easy way to iterate over an associative array of this structure in PHP: The array $searches has a numbered index, with between 4 and 5 associative parts. So I not only need to iterate over…


Accessing.NET components from Powershell

I want to use Powershell to write some utilities, leveraging our own.NET components to handle the actual work. This is in place of writing a small console app to tie the calls together. My questio…


algorithm - How do you rotate a two dimensional array?

Inspired by Raymond Chen's post, say you have a 4x4 two dimensional array, write a function that rotates it 90 degrees. Raymond links to a solution in pseudo code, but I'd like to see some real world…


c# - Comparing two byte arrays in.NET

How can I do this fast? Sure I can do this: static bool ByteArrayCompare(byte[] a1, byte[] a2){if(a1.Length != a2.Length) return false; for(int i=0; i<a1.Length; i++) if(…


.Net arrays with lower bound>0

Although perhaps a bizare thing to want to do, I need to create an Array in.Net with a lower bound>0. This at first seems to be possible, using: Array.CreateInstance(typeof(Object), new int[]{2},…



c# - Merging two arrays in.NET

Is there a built in function in.NET 2.0 that will take two arrays and merge them into one array? The arrays are both of the same type. I'm getting these arrays from a widely used function within my c…


Three dimensional arrays of integers in C++

I would like to find out safe ways of implementing three dimensional arrays of integers in C++, using pointer arithmetic/dynamic memory allocation, or, alternatively using STL techniques such as ve…




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