What’s the difference between "Array()" and "[]" while declaring a JavaScript array?
Whats the real difference between declaring an array like this: var myArray = new Array(); and var myArray = []; ...
arrays
C# bitmap images, byte arrays and streams!
I have a function which extracts a file into a byte array (data). int contentLength = postedFile.ContentLength; byte[] data = new byte[contentLength]; postedFile.InputStream.Read(data, 0, contentLength); Later I use this byte array to construct an System.Drawing.Image object (where data is the byte array) ...
javascript: how to check if an array element only contains new line?
A plain text file made up of paragraphs and some blank lines is loaded into an array via Ajax. The array is split into elements by new lines, such as: var infoArray = new Array(); infoArray = response.split("\n"); Then the array is put through a for loop, with various tests for keywords in various elements, which indicate the next n-e...
Search for hash in an array by value
Hello, I have a function which extracts Excel data into an array of hashes like so: sub set_exceldata { my $excel_file_or = '.\Excel\ORDERS.csv'; if (-e $excel_file_or) { open (EXCEL_OR, $excel_file_or) || die("\n can't open $excel_file_or: $!\n"); while () { chomp; ...
pass into the constructor across an array
if i have a class FooWrapper that takes in a Foo during construction: Foo foo = new Foo(); FooWrapper fooWrapper = new FooWrapper(foo); Often, i get an array of Foo's back from some API Foo[] foos = _api.GetFoos(); is there anyway for me to build up an array of FooWrappers by passing in the appropriate Foo object without simply loo...
Elegant way to go from list of objects to dictionary with two of the properties
i seem to write this code over and over again and wanted to see if there was a better way of doing it more generically. I start out with a list of Foo objects Foo[] foos = GenerateFoos(); I think want to create a dictionary where the key and value are both properties of Foo for example: Dictionary<string, string> fooDict = new Dict...
[C++] How do I declare a 2d array using new?
how do i declare a two d array using new? like for a "normal" array i would: int* ary = new int[Size] but int** ary = new int[sizeY][sizeX] a) deosn't work/compile and b) doesn't acomplish what: int ary[sizeY][sizeX] does. ...
Create new array from key list in PHP
I want a quick easy way to copy an array but the ability to specify which keys in the array I want to copy. I can easily write a function for this, but I'm wondering if there's a PHP function that does this already. Something like the 'array_from_keys' function below. $sizes = array('small' => '10px', 'medium' => '12px', 'large' => '13...
How remove empty element from string array in one line?
string[] ssss = "1,2,,3".Split(new[] {','}).Where(a=>!string.IsNullOrEmpty(a)).Select() How does this works? ...
How to pass pointer to an array in Python for a wrapped C++ function
I am new to C++/Python mixed language programming and do not have much idea about Python/C API. I just started using Boost.Python to wrap a C++ library for Python. I am stuck at wrapping a function that takes pointer to an array as an argument. Following (2nd ctor) is its prototype in C++. class AAF{ AAF(AAF_TYPE t); AAF(double v0, ...
Is synchronization needed when manipulating different array(object array) indices.
In the context if Java, I have a code like this, MyObject[] array; and in different threads i have a code like this array[i] = new MyObject(val); If I ensure that each of my threads use different values of "i" then would I need to synchronize the above statement to take care of race conditions? ...
array_filter filtering out entire array
I have an array of arrays, each array containing details of a scan by a medical device. I'm getting this data from text logs that are dumped nightly. The format of which is this: $this->scans = array( array( 'patientid' => (int), 'patientname' => 'John Skeet', 'reviewed' => 0 or 1 //plus more irrelevant ), arr...
looking for suggesions re: accessing data and populating List/arraylist/list
Hello All - I am looking to do something like this: access records in db with a datareader. I won't know how many records will come back - somewhere between 1 and 300 most of the time. The data will look something like this "0023","Eric","Harvest Circle", "Boston" for each record. I wanted to immediately populate something (array, list...
C# arrays , Getting a sub-array from an existing array.
I Have an array X of 10 elements. I would like to create a new array containing all the elements from X that begin at index 3 and ends in index 7. Sure I can easily write a loop that will do it for me but I would like to keep my code cleaner as possible.I also think its stupid to write methods that already exists. Is there a method in C#...
Best way to cast from Animal[] to Dog[]
If Dog enherits from Animal. And I have a Animal[], that I happen to know contains only dogs. What's the fastest/best way to get my hands on a Dog[] ? I've used new ArrayList(oldarray).ToArray(typeof(Dog)); so far, but that feels a bit clumsy, and I'm wondering if there is something more elegant. UPDATE: Using the .net 2.0 profile. ...
2d Array in Spiral Order
I'm trying to fill an array in spiral order. So far, I can print the array in spiral order, but is there a way to modify the array so that i can fill it in spiral order and then just print the array? I'd like it to go in decreasing order like a countdown. Please help! public class Spiral { public static void main(int m, int n) { ...
Array.prototype problem
I was working on an AJAX-enabled asp.net application. I've just added some methods to Array.prototype like Array.prototype.doSomething = function(){ ... } This solution worked for me, being possible reuse code in a 'pretty' way. But when I've tested it...
How to pass an array from C# function to VBA?
How to pass an array from C# function to VBA? Can it be done? ...
Splicing a string indexed array in JavaScript
Gday All, I have a string indexed array that I would like to remove an item from. Consider the following example code: var arr = new Array(); arr[0] = "Zero"; arr[1] = "One"; arr[2] = "Two"; arr.splice(1, 1); for (var index in arr) document.writeln(arr[index] + " "); //This will write: Zer...
Java Array sort: Quick way to get a sorted list of indices of an array
The problem: Consder the following floats[]: d[i] = 1.7 -0.3 2.1 0.5 What I want is an array of int[] that represents the order of the original array with indices. s[i] = 1 3 0 2 d[s[i]] = -0.3 0.5 1.7 2.1 Of course it could be done with a custom comparator, a sorted set of custom objects, or by simply sorti...