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• VB6: Slow Binary Write?

  - by Tom the Junglist

  Wondering why a particular binary write operation in VB is so slow. The function reads a Byte array from memory and dumps it into a file like this: Open Destination For Binary Access Write As #1 Dim startP, endP As Long startP = BinaryStart endP = UBound(ReadBuf) - 1 Dim i as Integer For i = startP To endP DoEvents Put #1, (i - BinaryStart) + 1, ReadBuf(i) Next Close #1 For two megabytes on a slower system, this can take up to a minute. Can anyone tell me why this is so slow?

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• How to expose multi-element field in base class to derived classes

  - by Brian Triplett

  I have a base class that declares a grouping of objects. That grouping can be an array, List, Collection, that's up to me. The derived classes of this base class are the ones that actually set the values of this multi-element field. What is the best way to expose this field to the derived classes?

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• cakePHP, multiple hasOne in a single model

  - by jason

  say you have 3 models : user, hair_color, and eye_color user hasOne hair_color user also hasOne eye_color however var $hasOne = 'hair_color'; var $hasOne = 'eye_color'; obviously wont work. So how do you implement many hasOne relationships in a single model? I assume the answer is in the cookbook, Im going over that area now, I suspect it has something to do with passing an array to $hasOne, but no example of doing this.

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• How can I show a count of rows from an ng-repeat?

  - by Anne

  I have a table on my web page that is populated with data like this: <tr data-ng-repeat="row in grid.data | filter:isQuestionInRange"> <td>{{ row.problemId }}</td> </tr> Is there a way that I can put a count of the rows displayed in the table footer. Note that I want to be able to show the rows after that have been filtered not just the row count from the grid.data array.

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• C - converting to 2s compliment

  - by tom

  I've decided to do it this way flip numbers 0=1, 1=0 add 1 to LSB if carry, loop until array[i]==0 But i'm stuck on the last point, how can I say that in a conditional loop?

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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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• Why is this undefined behaviour?

  - by xryl669

  Here's the sample code: X * makeX(int index) { return new X(index); } struct Tmp { mutable int count; Tmp() : count(0) {} const X ** getX() const { static const X* x[] = { makeX(count++), makeX(count++) }; return x; } }; This reports Undefined Behaviour on CLang version 500 in the static array construction. For sake of simplication for this post, the count is not static, but it does not change anything.

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• Retrieve all hashtags from a tweet in a PHP function

  - by snorpey

  Hi. I want to retrieve all hashtags from a tweet using a PHP function. I know someone asked a similar question here, but there is no hint how exactly to implement this in PHP. Since I'm not very familiar with regular expressions, don't know how to write a function that returns an array of all hashtags in a tweet. So how do I do this, using the following regular expression: #\S*\w

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• C++ parent class alignment

  - by aaa

  hello. Is it possible to specify alignment of parent class? for example something like (which does not compiled): template<size_t n> class Vector : public boost::array<double,n> __attribute__ ((aligned(16))) { thanks

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• How to check if an Object is a Collection Type in Java ?

  - by Tony

  By using java reflection, we can easily know if an object is an array. What's the easiest way to tell if an object is a collection(Set,List,Map,Vector...)?

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• Returning the nearest multiple value of a number

  - by mouthpiec

  Hi, I need a function by which I will be able to convert a number to a nearest value of a given multiple. Eg i want an array of number to be set to the neareast multiple of 16, so 2 = 0, 5 = 0, 11 = 16, 17 = 16, 30 = 32 etc thanks

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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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• intialization with a nibFIle failed

  - by zp26

  Hi, I have a problem. I try to initialize a variabile in a classViewController created inside a xib file. I try with the code below but when i append a object to array, these array isn't initialized. Can you help me? thanks and sorry for my english. #import <UIKit/UIKit.h> @interface AccelerometroViewController : UIViewController <UIAccelerometerDelegate, UITextFieldDelegate, UIAlertViewDelegate>{ //..... NSMutableArray *arrayPosizioni; NSMutableArray *arrayPosizioniCorrenti; NSString *nomePosizioneCorrente; } -(IBAction)salvaPosizione; //... @property (nonatomic, assign) NSMutableArray *arrayPosizioni; @property (nonatomic, assign) NSMutableArray *arrayPosizioniCorrenti; @property (nonatomic, assign) NSString *nomePosizioneCorrente; @end #import "AccelerometroViewController.h" #import "Position.h" @implementation AccelerometroViewController float actualX; float actualY; float actualZ; @synthesize arrayPosition; @synthesize arrayCurrentPosition; @synthesize nameCurrentPosition; -(id)init { self = [super init]; if (self != nil) { arrayPosition = [[NSMutableArray alloc]init]; arrayCurrentPosition = [[NSMutableArray alloc]init]; nameCurrentPosition = [NSString stringWithFormat:@"noPosition"]; actualX = 0; actualY = 0; actualZ = 0; } return self; } -(void)updateTextView:(NSString*)nomePosizione { NSString *string = [NSString stringWithFormat:@"%@", nameCurrentPosition]; textEvent.text = [textEvent.text stringByAppendingString:@"\n"]; textEvent.text = [textEvent.text stringByAppendingString:string]; } -(IBAction)savePosition{ Posizione *newPosition; newPosition = [[Position alloc]init]; if([newPosition setValue:(NSString*)fieldNomePosizione.text:(float)actualX:(float)actualY:(float)actualZ]){ //setValue is a method of Position. I'm sure that this method is correct UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Salvataggio Posizione" message:@"Posizione salvata con successo" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil]; [alert show]; [alert release]; [arrayPosition addObject:newPosition]; } else{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Salvataggio osizione" message:@"Errore nel salvataggio" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil]; [alert show]; [alert release]; } } - (void) initialise { arrayPosition = [[NSMutableArray alloc] init]; arrayCurrentPosition = [[NSMutableArray alloc] init]; nameCurrentPosition = @"noPosition"; actualX = 0; actualY = 0; actualZ = 0; } - (id)initWithNibName:(NSString *)nibName bundle:(NSBundle *)nibBundle { if (self = [super initWithNibName:nibName bundle:bundle]) { [self initialise]; } }

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• How do I get the number of visible characters from a UTF-8 encoded char*?

  - by Bill

  I have a UTF-8 encoded char*. Is there a standard function to calculate the number of visible characters represented by the byte array? I'm on Red Hat (RHEL 5).

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• What should be the RegEx if I want to find the text between the phrases " IF (NEW." and " !"?

  - by Parth

  What should be the RegEx if I want to find the text between the phrases " IF (NEW." and " !"? Likewise I am thinking of the pattern as $pattern = '/(?<= IF (NEW.)[^ !]+/'; I am matching it as $input = $row4['ACTION_STATEMENT']; preg_match_all($pattern, $input, $captures); What if I want $captures as an array, in which all values will be stored which will match with above pattern being in between of this pattern?

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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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• C# - Does function get called for each iteration of a foreach loop?

  - by Robert W

  If I have functionality like the following - will ReturnParts() get called for each iteration in a foreach loop, or will it get called just the once? private void PrintParts() { foreach(string part in ReturnParts()) { // Do Something or other. } } private string[] ReturnParts() { // Build up and return an array. }

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• Form filter in symfony: imposible when a field is type "date"

  - by user248959

  Hi, anyone has tried to create a symfony form filter from a class which has a field of type "date" ? When i do it, i get this error: 500 | Internal Server Error | Doctrine_Connection_Mysql_Exception SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens stack trace I think the error dependens on this command: 'SELECT b.id AS b_id, b.day AS b_day FROM birthday b WHERE b.day = ? AND b.day <= ?', array('month' = '1','day' = '2', 'year' = '2014') but i dont know how can i solve it.. Any idea? Javi

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• How can I set the default for a Dropdown (created using the Form Helper) by using the Form_validatio

  - by Shamoon

  In my view, I have: $form_prop = 'class="inp_step" id="bedrooms"'; echo form_dropdown( "bedrooms", array( null, 0,1,2,3,4,5,6,7,8,9,10), null, $form_prop ); So how do I stick a <?php echo $this->validation->set_select('myselect', 'one'); ?> in there?

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• How to make a struct of structs in C++

  - by Phenom

  Can a struct contain other structs? I would like to make a struct that holds an array of four other structs. Is this possible? What would the code look like?

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• C++/CLI, I have a Byte[] and I need a char* to the first and last elements.

  - by Jacob G

  I've been handed a Byte[] that contains a file. I need to pass this to another method that is expecting two parameters, a char* to the beginning of the file and a char* to the end of the file. I'm assuming I need to pin the array first so it doesn't get collected. I don't imagine I can then just cast the first and last elements, right?

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• C++ - 3 possible values in Variable?

  - by noryb009

  I need to store a 30 letter combination, but each letter can only be "0", "1" or "2". When I use sizeof(myString), it returns 32. I want to use this 30 letter combination to access a row of an array, so I'm wondering if it is possible to use a 3 value bool of some sort to store 1 of 3 values in.

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• Where did the name `atoi` come from?

  - by Earlz

  Ok I've been curious about this for a while. In the C language where did they come up with the name atoi for converting a string to an integer? The only thing I can think of is Array To Integer for an acronym but that doesn't really make sense.

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• dot length in java - finding its definition

  - by abson

  In which class the length variable is defined in java(one used for printing array length)? Will I be able to see it defined say in Object class? EDIT : Why was this field so designed(any thing related with security or memory efficiency)?

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• Getting contents of square brackets with regex, including nested ones

  - by peroyomas

  Is there any way to have this: [one[two]][three] And extract this with a regex? Array ( [0] => one[two] [1] => two [2] => three

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