What is a good way to represent a collection of bits? I have a set of various on/off toggles (thousands of them) and need to store and retrieve their state. The naïve implementation would be an array of booleans, but I'm wondering if there's a better way (better in terms of access speed and/or memory requirements). I've found this BitA...
Hello all, Is there any maximum size for code in java.. i wrote a function with more than 10,000 lines. Actually , each line assigns a value to an array variable.. arts_bag[10792]="newyorkartworld"; arts_bag[10793]="leningradschool"; arts_bag[10794]="mailart"; arts_bag[10795]="artspan"; arts_bag...
This question might seem trivial and also stupid at the first glance, but it is much more than this. I have an array of any type T (T[]) and I want to convert it into a List generic (List<T>). Is there any other way apart from creating a Generic list, traversing the whole array and adding the element in the List? Present Situation: st...
I've noticed recently in PHP you can do this. $myNewArray = $oldArray + $someArray; This looks completely different to anything I've seen before involving manipulating arrays in PHP. How and why does it work? Are there any pitfalls? I have recently started using it in some places where I may have used array_unshift() and array_merge...
Hi, Basically my app is interacting with a web service that sends back a weird multidimensional array such as: Array ( [0] => Array ( [Price] => 1 ) [1] => Array ( [Size] => 7 ) [2] => Array ( [Type] => 2 ) ) That's not a problem, but the ...
Why does this code always return 0? var possibleMatches = new Array(); $.getJSON('getInformation.php', function(data) { $.each(data, function(i){ possibleMatches.push(data[i]); }) }); alert(possibleMatches.length); Though I can move or add "alert(possibleMatches.length);" inside the $.each and it will output the c...
I am using "solr" search engine to query an index for classifieds that match a given criteria. The results are the ID:numbers of the classifieds, which I then use to find all matches in a MySql database with those ID:s. The ID:s returned are put into an array. As you can see below the array is imploded. Then I use the "IN" to find all m...
public class Arrys { private int[] nums; //Step 3 public Arrys (int arrySize) { nums = new int[arrySize]; } public int [] getNums (){ return nums; } } Test class: public class TestArrys { public static void main(String args[]) { //Step 4 Arrys arry = new Arrys(10); ...
I have an array in the format: array ( '1' => array ( 'id' => '2', 'qty' => '4' ), '2' => array ( 'id' => '1', 'qty' => '1' ), '3' => array ( 'id' => '2', 'qty' => '3' ), '4' => array ( 'id' => '4', 'qty' => '6' ) ); And want to find all duplicates of the column '...
I'm building an API for my app and would like to return errors in the XML response that are generated by validation errors. So say you're registering on the site, right now the validation errors returned might be: Login has already been taken Password is too short (minimum is 6 characters) Email has already been taken But I'd like to...
In C, I want to loop through an array in this order for(int z = 0; z < NZ; z++) for(int x = 0; x < NX; x++) for(int y = 0; y < NY; y++) 3Darray[x][y][z] = 100; How do I create this array in such a way that 3Darray[0][1][0] comes right before 3Darray[0][2][0] in memory? I can get an initialization to work that g...
I am looping through an array of strings, such as (1/12/1992 apple truck 12/10/10 orange bicycle). The array's length will always be divisible by 3. I need to loop through the array and grab the first 3 items (I'm going to insert them into a DB) and then grab the next 3 and so on and so forth until all of them have been gone through. //...
i work with php/Mysql i have table with two cols (date , cash) with values like {7/2001:100$, 12/2001:50$ , 1/2002:30$ , 5/2002:90$ , 6/2003:80$,9/2003:20$ } i would like to make cash flow table that have cols (Jan,Feb,Mar,............Dec) and row for every year in the date array and the value of cash in the table cells like blow . Ho...
I have a simple associative array: $ar = array( 1=>'foo', 2=>'bar', 5=>'foobar', 8=>'barfoo' ) I need to efficiently find holes in the keys. The keys are guaranteed to be integers. findHole($ar) > 0 findHole($ar,1) > 3 findHole($ar,5) > 6 what is the easiest way to do this? ...
Hi! I am a beginner with java and has got a problem that I just cant solve. I am trying to add strings to my array, I have tested my array so that work. But my problem is that I have created an actionlistener and trying to get the text from another class and then add it to the array. My Buttonlistener: public class ButtonListener ex...
When creating a 3D array in C#, which is a better way to create it? Array[a,b,c] or Array[a][b][c]? Or is it just a matter of preference? ...
TL DR; What is the most efficient way to sort and compare values in a multiple arrays? Okay, so we'll assume a few constants to make this whole thing simple var a = [1, 2, 3, 4, 5, 6], b = [0, 9, 8, 7, 6, 88, 99, 77], i, j; Now if I wanted to see if any value in a is equal to any other value in b I'd have to sort through one of these a...
Just take any dataset and convert the dataset into matrix. And convert the matrix into array formate in vb.net ...
I have a variable that contains : Sometimes array of strings and sometimes array of array of strings e.g: var words = a LINQ to XML query; //words == { "01", "02", "03", ... } //or //words == { {"01", "02", "03"}, {"04", "05", "06"}, ... } Now , I wanna access to each item in the words array with a for statement Could you please guid...
I heard that there is a hard limit on the size of .Net Array. It is said that the maximum amount of memory that can be allocated to any single instance of an Array object ( regardless of whether it's int[], double[] or your own array) is 2GB. And no, if you have a 64 bit machine, the 2GB limit is still there. I'm not sure whether my imp...