Java array: direct access to component in array
Am I able to access an array component directly such as: String x = args[1] ? or do I have to use a loop and use args[i] ? ...
arrays
How do I copy a two dimensional array of strings?
EDIT: ah, there it is! Problem solved, thank you! (Bug was elsewhere, not in the copy function.) I'm working with a program that uses two-dimensional arrays of Strings (probably not that smart to begin with, but eh), and I'd like to write a function that takes one of these arrays (let's say array1), makes an independent copy, and retur...
performance of array cloning
We all know that $a1 = array('foo'); $a2 = $a1; $a2[0] = 'bar'; // now $a1[0] is foo, and $a2[0] is bar. The array is copied However, what I remember reading, but cannot confirm by Googling, is that the array is, internally, not copied until it is modified. $a1 = array('foo'); $a2 = $a1; // <-- this should make a copy // but $a1 and ...
Convert an array of objects
how can i convert from: object[] myArray to Foo[] myCastArray ...
C# Permutation of an array of arraylists?
I have an ArrayList[] myList and I am trying to create a list of all the permutations of the values in the arrays. EXAMPLE: (all values are strings) myList[0] = { "1", "5", "3", "9" }; myList[1] = { "2", "3" }; myList[2] = { "93" }; The count of myList can be varied so its length is not known beforehand. I would like to be able to ...
arsort with Actionscript 3
How would one sort an indexed array and maintain the index association in Actionscript 3.0. The Array.sort(); method seems to reindex the array no matter what. Basically I need to recreate the arsort php function in Actionscript. Possible? ...
Building a "crosstab" or "pivot" table from an array in php
I have an array of objects defined similarly to the below: $scores = array(); // Bob round 1 $s = new RoundScore(); $s->Round_Name = 'Round 1'; $s->Player_Name = 'Bob'; $s->Score = 10; $scores[0] = $s; // Bob round 2 $s = new RoundScore(); $s->Round_Name = 'Round 2'; $s->Player_Name = 'Bob'; $s->Score = 7; $scores[1] = $s; // Jack ro...
How to write NSArray to NSOutputStream?
I want to send out an NSArray, so I have to write it to an NSOutputStream first. The method should be : - (NSInteger)write:(const uint8_t *)buffer maxLength:(NSUInteger)length I can convert the array's pointer to uint8 _ t using : (uint8_t *)arr But how to get the length of bytes of the array? Do I have to save the array to a file an...
C++ STL: Can arrays be used transparently with STL functions?
I was under the assumption that STL functions could be used only with STL data containers (like vector) until I saw this piece of code: #include <functional> #include <iostream> #include <numeric> using namespace std; int main() { int a[] = {9, 8, 7}; cerr << "Sum: " << accumulate(&a[0], &a[3], 0, plus<int>()) << endl; retu...
Comparing Arrays in C#
I am trying to compare two arrays with eachother. I tried this code and got the following errors static bool ArraysEqual(Array a1, Array a2) { if (a1 == a2) return true; if (a1 == null || a2 == null) return false; if (a1.Length != a2.Length) return false; IList list1 = a1, list2 = a2; //error C...
How to remove an arbitrary element from a JavaScript array?
In my Google Maps application I can place markers on the map, and I keep a reference to each of the markers placed, along with some extra information in an array called markers. Adding markers is easy, I just push() the newly created object onto the array (markers.push(marker)); However, when it comes to removing an arbitrary marker fr...
Best way to store Country codes, names, and Continent in Java
I want to have a List or Array of some sort, storing this information about each country: 2 letter code Country name such as Brazil Continent/region of the world such as Eastern Europe, North America, etc. I will classify each country into the region/continent manually (but if there exists a way to do this automatically, do let me k...
What is the best way to clear an array of strings?
What is the best way to clear an array of strings? ...
Convert js Array() to JSon object for use with JQuery .ajax
Hi, in my app i need to send an javascript Array object to php script via ajax post. Something like this: var saveData = Array(); saveData["a"] = 2; saveData["c"] = 1; alert(saveData); $.ajax({ type: "POST", url: "salvaPreventivo.php", data:saveData, async:true }); Array's indexes are strings and not int, so for t...
array_flip certain keys
What would be a good way of fliping key 1 with key 2? // original Array ( [0] => Text1 [1] => World [2] => Hello ) // after Array ( [0] => Text1 [1] => Hello [2] => World ) Any clues. Thanks ...
Why is my array throwing Out of Range Exception Error?
Why does the following code throw an exception? for (int i = 0; i <= Items.Length-1; i++) { Console.WriteLine(Items[i,1]); } Exception: System.IndexOutOfRangeException was unhandled Message="Index was outside the bounds of the array." Source="Es" StackTrace: at Es.Program.Main(String[] args) in C:\Users\Fero\Docu...
How to work out 1D array If I can't predict it's length?
Duplicate Array of Unknown Length in C# How do I initialize string[] without a need of initializing the length? I want it to be dynamic array, so when I add something, Length increases and no Exception raises? Should I just use some kind of List? ...
F# array_chunk for Sequence
I'm having some trouble making a sequence. Basically I need to chop a sequence into a sequence of arrays. Seq.windowed almost does it but I don't want duplicate elements. I can get what I want by reading everything into an array first but I'd rather use a sequence. let array_chunk s (a:int[]) = Array.init (a.Length / s) (fun i ->...
How do I skip lines that aren't whitespace or a number in Perl?
I am reading data from a file like this while (<$fh>) { @tmp = split; # <-- ? push @AoA, [@tmp]; } I have a couple of questions regarding this. What does the marked line do? Does it split the file by lines and store elements of each line into an array?? If so, is it possible to convert @tmp into a string or do a regex...
Array or List in Java. Which is faster ?
I have to keep thousands of strings in memory to be accessed serially in Java. Should I store them in an array or should I use some kind of List ? Since arrays keep all the data in a contiguous chunk of memory (unlike Lists), would the use of an array to store thousands of strings cause problems ? Answer: The common consensus is that t...