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• I need a dictionary-like mapping between characters and other kinds of objects. Which class would be

  - by nullPointerException

  This is in Squeak/Pharo. If I want to have a mapping between Character objects like $a and $b to other kinds of objects, and want to look up those other objects based on the Character, what is the best class to use? Dictionary is an obvious choice, but seems wasteful to be hashing character objects which are basically already numbers. I guess what I want is a kind of array where the character value (number) is used as an index/offset, but I am not sure if this is possible with Unicode.

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• Circular increment: Which is "better"?

  - by Helper Method

  When you have a circular buffer represented as an array, and you need the index to wraparound (i.e., when you reach the highest possible index and increment it), is it "better" to: return (i++ == buffer.length) ? 0: i; Or return i++ % buffer.length; Has using the modulo operator any drawbacks? Is it less readable than the first solution?

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• if with multiple conditions, order of execution

  - by markus

  Hi, In an if statement with multiple conditions is second executed if the outcome is clear after checking the first condition? example: if(i>0 && array[i]==0){ } If I swap the conditions a seg fault may occur for negative values of i but this way the memory debugger doesn't find a problem. Can I be sure that this works always or do have have to use nested if statements?

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• How to apply a function to a collection of elements

  - by Cue

  Consider I have an array of elements out of which I want to create a new 'iterable' which on every next applies a custom 'transformation'. What's the proper way of doing it under python 2.x? For people familiar with Java, the equivalent is Iterables#transform from google's collections framework.

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• java: primitive arrays -- are they initialized?

  - by Jason S

  If I use a statement in my code like int[] a = new int[42]; does it initialized the array to anything in particular? (e.g. 0) I seem to remember this is documented somewhere but I am not sure what to search for.

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• Java sockets - how to determine data type on the server side?

  - by markovuksanovic

  I'm using Java sockets for client - server application. I have a situation when sometimes client needs to send a byte array (using byteArrayOutputStream) and sometimes it should send a custom java object. How can I read the information from the input stream on the server side and determine what is in the stream so that I can properly process that?

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• How do you label output variables in an IDL FOR loop for further processing outside the loop in the same program?

  - by user610769

  I have a FOR loop like this: FOR k = 1,216 DO atom = G[,0::(215+k)] END What I would like to be able to do is to store in memory the array for each atom, say, atom_k and then call these different variables to perform further operations outside the FOR loop. Conceptually, I want to label the "atom" variable with the "k" counter somewhat like this: FOR k = 1,216 DO atom(k) = G[,0::(215+k)] END Of course, this doesn't work because "k" is no longer a label in this case. Does anyone know?

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• Adding a LIKE criteria to a Rails Conditions block

  - by Neil Middleton

  Consider the following code which is to be thrown at an AR find: conditions = [] conditions[:age] = params[:age] if params[:age].present? conditions[:gender] = params[:gender] if params[:gender].present? I need to add another condition which is a LIKE criteria on a 'profile' attribute. How can I do this, as obviously a LIKE is usually done via an array, not a hash key.

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• PHP - getting content of the POST request

  - by user364622

  I have problem with getting the content. I don't know the names of the post variables so I can't do this using = $_Post['name'] because I don't know the "name". I want to catch all of the variables send by POST method. How can I get keys of the $_Post[] array and the values related with them?

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• Can a PHP function return a lot of vars?

  - by sundowatch

  Can a PHP function return a lot of vars without array? I want like that: <?php public function a() { $a = "a"; $b = "b"; $c = "c"; } echo a()->a; echo a()->b; echo a()->c; ?> How can I access to $a,$b,$c vars?

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• C#: Do I need to lock a static class when accessing from separate threads?

  - by JimDaniel

  I have a static class with a few methods that just take in a byte array, parses it, and returns a structure. I need to call these methods from many separate threads. Do I need a lock() or some kind of thread-safety within the methods? I can't get my head around it.

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• How to Concatenate 2 C strings, without overwriting any terminating Null characters?

  - by Ben313

  Hello, I am trying to set up a list of file names for a parameter to SHFileOperation. I want to be able to concatenate a file name onto the char array, but i dont want to get rid of the terminating character. for example, I want this: C:\...\0E:\...\0F:\...\0\0 when i use strcat(), it overwrites the null, so it looks like C:\...E:\...F:\...0\ Is there any easy way to do this? or am i going to have to code a new strcat for myself?

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• [Django] How do I filter the choices in a ModelForm that has a CharField with the choices attribute

  - by nubela

  I understand I am able to filter queryset of Foreignkey or Many2ManyFields, however, how do I do that for a simple CharField that is a Select Widget (Select Tag). For example: PRODUCT_STATUS = ( ("unapproved", "Unapproved"), ("approved", "Listed"), #("Backorder","Backorder"), #("oos","Out of Stock"), #("preorder","Preorder"), ("userdisabled", "User Disabled"), ("disapproved", "Disapproved by admin"), ) and the Field: o_status = models.CharField(max_length=100, choices=PRODUCT_STATUS, verbose_name="Product Status", default="approved") Suppose I wish to limit it to just "approved" and "userdisabled" instead showing the full array (which is what I want to show in the admin), how do I do it? Thanks!

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• A Plot Graph .NET WindowsForm Component Free

  - by user255946

  Hello All, I'm searching for a plot .NET component to plot a 2D line chart, given an array of data. It will be used with WindowsForm (C#) and It will be very helpful if it could be freeware. It is for a scientific application. This is my first asked question in stackoverflow, and excuse me for my terrible English written.

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• Binding a collection to Listbox

  - by Blub

  Hi, I basically started today with WPF, and I'm astounded by how difficult it is to do binding. I have an array of Textboxes, in an ObservableCollection, and just want to bind that in my Listbox, so that they arrange themselves vertically. I have fiddled around with this for 3 already, can you help? I'm working in a Wpf "UserControl", not a window as so many tutorials seem to rely on.

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• iPhone UITableView with index can I push a different detailed view with every different cell?

  - by Tanner

  Hello All, I know its possible to create a table that has an index on the side and a search bar at the top that a user can type in to find an item, but is it possible to say to the table if array isEqual to "item1" push view1? I would like to push a different view with each cell. Anyone have any advice?

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• Smart coding on ActionScript 2 (importing vars from a php)

  - by DomingoSL

  Hello, i have a php who when is executed it give me a couple of vars in this format: &lVar1=DATA1&&lVar2=DATA2&&lVar3=DATA3 and soo... The problem is that i dont know the quantity of lVar the php script is gonna give in any time, so i cant figure out a smart script in AS2 to import all of them into a array to my flash. Can you help me?

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• How I return the size of the pointer that I have allocate with malloc?

  - by drigoSkalWalker

  See this example! int main( int argc, char ** argv ) { int *ptr = malloc(100 * sizeof (int)); printf("sizeof(array) is %d bytes\n", sizeof(ptr)); } The printf function return only 4 bytes! What is wrong? Thanks so much!!!

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• Basics of working with Arrays in Java

  - by Emanuil

  How do you: 1. Initialize (create) an Array. 2. Push a String value into it. 3. Push another String value into it. 4. Dump it to get its contents.

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• Can i Use the value of a variable from within a ruby script inside ssh.exec()

  - by kamal

  If i have a # {} , like #{results}, in the snippet below: results = Array.new                                   f = open("/Users/kahmed/messages", "r")                                   f.each_line do |line|                                        results << "#{$.} #{line}" if line =~ /NFE/                                       put #{results}                                   end How can i use it in the following ssh.exec command Net::SSH.start( HOST, USER, :password = PASS ) do|ssh|                                   ssh.exec(#{results})

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• How to display after 4 week date from now?I want to pass an argument.

  - by vinothkumar

  echo date( "F jS, Y" , strtotime("now +3 weeks") ); It gives the result as July 2nd, 2010 . Fine.Now I want to pass the argument like this. The original print_r($originalamount) give the result like this Array ( [0] = 4 Months [1] = 3500 ) My code $text=trim($originalamount[0]); $text1="now +".$text; echo date( "F jS, Y" , strtotime($text1)) ; The out put come like this December 31st, 1969 I dont know why?

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• Creating and saving image from byte[]

  - by dotnetdev

  Hi, I am storing an array of bytes into SQL Server. I want to create and save an image from a byte[] but several attempts seem unreliable and result in intermittent exceptions. What is the best way to go about this?

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• What's wrong with my using pdo this way?

  - by user198729

  $sql = "SELECT * FROM table ORDER BY :sort :dir LIMIT :start, :results"; $stmt = $dbh->prepare($sql); $stmt->execute(array( 'sort' => $_GET['sort'], 'dir' => $_GET['dir'], 'start' => $_GET['start'], 'results' => $_GET['results'], ) ); I tried to use prepare to do the job,but $stmt->fetchAll(PDO::FETCH_ASSOC); returns nothing.

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• Finding all links and e-mail addresses in a string

  - by Semas

  What could be the easiest way to match all links and e-mail addresses in a string to a list array? I was using preg_match in PHP but in C# it looks like it will be way different.

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• How to convert from base-256 to base-N, where N is higher than 16?

  - by mark

  Dear ladies and sirs. I need to convert an array of bytes to another base, namely 85. In math terms the question is how to convert from base-256 to base-85 in the most efficient way? This question is inspired by my previous question - http://stackoverflow.com/questions/2827627/what-is-the-most-efficient-way-to-encode-an-arbitrary-guid-into-readable-ascii-3 Thanks.

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