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  • Remove adjacent identical elements in a Ruby Array?

    - by Mike Woodhouse
    Ruby 1.8.6 I have an array containing numerical values. I want to reduce it such that sequences of the same value are reduced to a single instance of that value. So I want a = [1, 1, 1, 2, 2, 3, 3, 3, 3, 2, 2, 2, 3, 3, 3] to reduce to [1, 2, 3, 2, 3] As you can see, Array#uniq won't work in this case. I have the following, which works: (a.size - 1).downto(1) { |i| a[i] = nil if a[i - 1] == a[i] } Can anyone come up with something less ugly?

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  • PHP Array Key & value Question

    - by Nano HE
    Hi I writed a test code as below. <?php $url = 'http://localhost/events/result/cn_index.php?login'; print_r(parse_url($url)); echo parse_url($url, PHP_URL_PATH); ?> Output Array ( [scheme] => http [host] => localhost [path] => /events/result/cn_index.php [query] => login ) /events/result/cn_index.php Now I inserted the line below echo array[query]; // I want to echo 'login', but failed. How to the the value of 'login'?

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  • Can I show a single country (masked out) in GoogleMaps?

    - by NIclas Lindbegr
    Hello! Is it possible to mask away neighbor countries in GoogleMap? In my case I just want to show Sweden on one view. On a second view just Norway, Denmark etc etc... I know it is possible to draw polygon lines and fill them accordingly on to Maps API. Problem is that or the result sets get huge or the lines get very rough etc... Would be nice if GoogleMaps could deliver a country at the time without neighbors. Does anyone know about a good coordinate database with country borders? Best best regards, Niclas

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  • Array of char *

    - by user353060
    Hello, I am having problems with array pointers. I've looked through Google and my attempts are futile so far. What I would like to do is, I have a char name[256]. I will be 10 of those. Hence, I would need to keep track of each of them by pointers. Trying to create a pointer to them. int main() { char superman[256] = "superman"; char batman[256] = "batman"; char catman[256] = "catman"; char *names[10]; names[0] = superman; names[1] = batman; system("pause"); return 0; } How do I actually traverse an array of pointers?

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  • Is the a pattern for iterating over lists held by a class (dynamicly typed OO languages)

    - by Roman A. Taycher
    If I have a class that holds one or several lists is it better to allow other classes to fetch those lists(with a getter) or to implement a doXList/eachXList type method for that list that take a function and call that function on each element of the list contained by that object. I wrote a program that did a ton of this and I hated passing around all these lists sometimes with method in class a calling method in class B to return lists contained in class C, B contains a C or multiple C's (note question is about dynamically typed OO languages languages like ruby or smalltalk) ex. (that came up in my program) on a Person class containing scheduling preferences and a scheduler class needing to access them.

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  • Array basics - Populating with loop

    - by madlan
    Hi, I'm looping through a zip file trying to add the file name of each file within. Is this the correct method? Dim ZipNameArray(?) Using zip As ZipFile = ZipFile.Read(ZipToUnpack) For Each file In zip ZipNameArray(?) = file .FileName Next End Using I do not know the array size until I start looping through the zip (To work out the number of files within). How do I increment the Array? file is not a number? (It's a ZipEntry)

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  • Java - converting String in array to double

    - by cc0
    I'm stuck with this pretty silly thing; I got a textfile like this; Hello::140.0::Bye I split it into a string array using; LS = line.split("::"); Then I try to convert the array values containing the number to a double, like this; Double number = Double.parseDouble(LS[1]); But I get the following error message; Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 1 Does anyone have any idea why this doesn't work?

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  • Core Data fetch request with array

    - by JK
    I am trying to set a fetch request with a predicate to obtain records in the store whose identifiers attribute match an array of identifiers specified in the predicate e.g. NSString *predicateString = [NSString stringWithFormat:@"identifier IN %@", employeeIDsArray]; The employeeIDsArray contains a number of NSNumber objects that match IDs in the store. However, I get an error "Unable to parse the format string". This type of predicate works if it is used for filtering an array, but as mentioned, fails for a core data fetch. How should I set the predicate please?

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  • Problem parsing XML data to Multi dimensional array

    - by Cam
    Hi there, i'm still transitioning from as2 to as3, i'm having trouble with parsing XML data to Multi dimensional array, below is the onComplete handler which is succesfully tracing 'event.target.data' but outputs 'A term is undefined and has no properties' when tracing _vein_data[0][0].xPos . I'm guessing there is a easier way to approach it than this attempt private function on_xml_completed(event:Event):void { var XMLPoints:XML = new XML(event.target.data); for ( var i:int = 0; i < XMLPoints.shape.length(); i++ ) { var shapeArray:Array = new Array(); _vein_data.push(shapeArray); for ( var j:int = 0; j < 4; i++ ) { _vein_data[i].push({'xPos':XMLPoints.shape[i].point[j].@xPos, 'yPos':XMLPoints.shape[i].point[j].@yPos}); } } trace(_vein_data[0][0].xPos) loadAsset(); } here's a portion of my XML; <items> <shape> <point xPos="60" yPos="23" /> <point xPos="65" yPos="23" /> <point xPos="93" yPos="85" /> <point xPos="88" yPos="87" /> </shape> <shape> <point xPos="88" yPos="87" /> <point xPos="92" yPos="83" /> <point xPos="145" yPos="174" /> <point xPos="138" yPos="175" /> </shape> <shape> <point xPos="138" yPos="175" /> <point xPos="143" yPos="171" /> <point xPos="147" yPos="211" /> <point xPos="141" yPos="212" /> </shape> </items> thank you in advance for any guidance on this Cam

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  • Checking values in this array, JQuery

    - by Felix Guerrero
    Hi. I have this array (JQuery) where I add all my form's controls, it looks like: var name = $("#name"), surname = $("#surname"), address = $("#address"), phone = $("#phone"), photo = $("#photo"), grade = $("#grade"), profession = $("#profession"), email = $('#email'), title = $('#title'), allFields = $([]).add(name) .add(surname) .add(address) .add(phone) .add(photo) .add(grade) .add(profession) .add(email) .add(title) .add(grade); I want to check the values of each element into the 'allFields' array with function checkingFieldsArentEmpty(){ var valid = true; for (var f in allFields){ if(allFields[f].val() === null) //if any val is null just return false return false; } //true return valid; } I need ideas in order to improve the last function. Thanks.

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  • displaying structs in an array using enumerator

    - by Mostaguen
    In an object I have : public IEnumerable<voiture> recup_voitures() { foreach (voiture v in _arrVCollection) { yield return (v); } } voiture being a struct and _arrVCollection being an array containing some struct voiture. In my main class I have : foreach (CarCollection.voiture o in collection.recup_voitures()) { //some code to display the content of each struct } What is happening is that if I have an array of length 5 and only 1 struct voiture in it, it will do the displaying code 5 times instead of only 1. What am I doing wrong?

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  • Data Structures for hashMap, List and Set

    - by harigm
    Can any one please guide me to look in depth about the Data Structures used and how is it implemented in the List, Set and Maps of Util Collection page. In Interviews most of the questions will be on the Algorithms, but I never saw anywhere the implementation details, Can any one please share the information.

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  • PHP Change Array Over and Over

    - by Steven
    Hello, I have any array $num_list = array(42=>'0',44=>'0',46=>'0',48=>'0',50=>'0',52=>'0',54=>'0',56=>'0',58=>'0',60=>'0'); and I want to change specific values as I go through a loop while(list($pq, $oin) = mysql_fetch_row($result2)) { $num_list[$oin] = $pq; } So I want to change like 58 to 403 rather then 0. However I always end up getting just the last change and non of the earlier ones. So it always ends up being something like 0,0,0,0,0,0,0,0,0,403 rather then 14,19,0,24,603,249,0,0,0,403 How can I do this so it doesn't overwrite it? Thanks

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  • Array.Copy: strange exception while concatenating two byte arrays

    - by robob
    In a application of mine that is developed in C# I have the following code: byte[] resb = new byte[Buffer.ByteLength(blockAr) + Buffer.ByteLength(previous)]; Array.Copy(blockAr, 0, resb,0, blockAr.Length); Array.Copy(previous, 0, resb, blockAr.Length, previous.Length); It's a very simple code to concatenate two byte arrays. The problem is that in some particular situation that I don't know I have that exception: ArgumentOutOfRangeException: sourceIndex is less than the lower bound of the first dimension of sourceArray. I cannot see any of strange in my code and I am not able to reproduce the exception. Could anyone help me to identify the problem? thanks

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  • Pass an array from one file to another using include

    - by mrakodol
    How to pass an array from one file to another using include using PHP language? I have one file with some language array(language/langen.php): global $lang; $lang['Here'] = 'Here'; $lang['Date'] = "Date"; In other file I have: include base_url().'language/lang'.$_COOKIE['lang'].'.php'; var_dump($lang); *(My mistake by coping code - true is var_dump($lang))* But it shows me an error: A PHP Error was encountered Severity: Notice Message: Undefined variable: lang How to solve this problem and what did I do wrong?

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  • Passing array to function with pointer loses array size information!

    - by Narek
    If I write int main() { int a[100] = {1,2,3,4,}; cout<<sizeof(a)/sizeof(a[0])<<endl; return 0; } I get 400! If I write void func(int *a); int main() { int a[100] = {1,2,3,4,}; func(a); return 0; } void func(int *a) { cout<<sizeof(a)/sizeof(a[0])<<endl; } Then I get 400! So why passing array to function with pointer loses array size information?

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  • Strange behaviour of keywords within macros in Clojure

    - by mikera
    I'm a little confused by how keyword accesses seem to behave in Clojure when they are evaluated at macro expansion time. The following works as I expect: (def m {:a 1}) (:a m) => 1 However the same keyword access doesn't seem to work within a macro: (def m {:a 1}) (defmacro get-a [x] (:a x)) (get-a m) => nil Any idea what is going on here?

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  • using Python reduce over a list of pairs

    - by user248237
    I'm trying to pair together a bunch of elements in a list to create a final object, in a way that's analogous to making a sum of objects. I'm trying to use a simple variation on reduce where you consider a list of pairs rather than a flat list to do this. I want to do something along the lines of: nums = [1, 2, 3] reduce(lambda x, y: x + y, nums) except I'd like to add additional information to the sum that is specific to each element in the list of numbers nums. For example for each pair (a,b) in the list, run the sum as (a+b): nums = [(1, 0), (2, 5), (3, 10)] reduce(lambda x, y: (x[0]+x[1]) + (y[0]+y[1]), nums) This does not work: >>> reduce(lambda x, y: (x[0]+x[1]) + (y[0]+y[1]), nums) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 1, in <lambda> TypeError: 'int' object is unsubscriptable Why does it not work? I know I can encode nums as a flat list - that is not the point - I just want to be able to create a reduce operation that can iterate over a list of pairs, or over two lists of the same length simultaneously and pool information from both lists. thanks.

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  • JavaScript, transform object into array

    - by Šime Vidas
    I've got an object: var obj = { "Mike": 24, "Peter": 23, "Simon": 33, "Tom": 12, "Frank": 31 }; I want to create an array that holds the values of the object. The keys (key names) can be disregarded: [24, 23, 33, 12, 31] The order of the values is NOT important! One solution (obviously) would be do have a function that takes the values and puts them into an array: var arr = valuesToArray(obj); I will accept such a function as the answer. However, I would be more pleased if there would be an API function (ECMAScript, jQuery, browser-specific, ...) that could do this. Is there such a thing?

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  • Drawing with element array in OpenGL ES

    - by FatalMojo
    Hello! I am trying to use OpenGLES to draw a x by y matrix of squares about an arbitrary point. I have an array sideVertice[] that holds a series of vertex structs defined as such typedef struct { GLfloat x; GLfloat y; GLfloat z; } Vertex3D; and an element array defined as such GLubyte elementArray[]; my draw loop is as such glLoadIdentity(); glVertexPointer(3, GL_FLOAT, 0, cube.sideVertice); for (int i=0; i<((cube.cubeSize + 1)*(cube.cubeSize + 1)); i++) { for (int j=0; j<=3; j++) { elementArray[j] = j + i*4; glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_BYTE, elementArray); } } for (int i=0; i<=3; i++) elementArray[i] = i; However, the visual output is corrupted and I cannot figure out what the problem is. here is an output of the vertice held in the array: 2010-04-15 23:44:48.816 RubixGL[4203:20b] vertex[0][0] x:-26.000000 y:1.000000 2010-04-15 23:44:48.817 RubixGL[4203:20b] vertex[1][1] x:-26.000000 y:26.000000 2010-04-15 23:44:48.826 RubixGL[4203:20b] vertex[2][2] x:-1.000000 y:1.000000 2010-04-15 23:44:48.829 RubixGL[4203:20b] vertex[3][3] x:-1.000000 y:26.000000 2010-04-15 23:44:48.830 RubixGL[4203:20b] Next Face 2010-04-15 23:44:48.830 RubixGL[4203:20b] vertex[0][4] x:1.000000 y:1.000000 2010-04-15 23:44:48.832 RubixGL[4203:20b] vertex[1][5] x:1.000000 y:26.000000 2010-04-15 23:44:48.837 RubixGL[4203:20b] vertex[2][6] x:26.000000 y:1.000000 2010-04-15 23:44:48.838 RubixGL[4203:20b] vertex[3][7] x:26.000000 y:26.000000 2010-04-15 23:44:48.848 RubixGL[4203:20b] Next Face 2010-04-15 23:44:48.849 RubixGL[4203:20b] vertex[0][8] x:-26.000000 y:-26.000000 2010-04-15 23:44:48.850 RubixGL[4203:20b] vertex[1][9] x:-26.000000 y:-1.000000 2010-04-15 23:44:48.851 RubixGL[4203:20b] vertex[2][10] x:-1.000000 y:-26.000000 2010-04-15 23:44:48.852 RubixGL[4203:20b] vertex[3][11] x:-1.000000 y:-1.000000 2010-04-15 23:44:48.853 RubixGL[4203:20b] Next Face 2010-04-15 23:44:48.853 RubixGL[4203:20b] vertex[0][12] x:1.000000 y:-26.000000 2010-04-15 23:44:48.854 RubixGL[4203:20b] vertex[1][13] x:1.000000 y:-1.000000 2010-04-15 23:44:48.854 RubixGL[4203:20b] vertex[2][14] x:26.000000 y:-26.000000 2010-04-15 23:44:48.855 RubixGL[4203:20b] vertex[3][15] x:26.000000 y:-1.000000 any ideas?

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  • creating an array of objects in c++

    - by tim22
    I'm trying to create an array of objects in c++. I'm creating a employee object, from my constructor in my company class here: employee obj(int tempIdNum, double tempBase, double tempSales, double tempRate); emp[tempcount]=obj; (this doesn't work?) Emp is the name of the array which is defined here, located in my company h file. Employee emp[4]; more code: Company::Company(string name, string fileName){ string str; int tempcount; int tempIdnum; double tempBase; double tempSales; double tempRate; double num; double arr[16]; this->name=name; //Commission temp; ifstream readFile; readFile.open("fileName"); int inc=0; while(tempcount<4){ for(int i=0+inc; i<4+inc; i++){ readFile>>num; arr[i-inc]=num; } tempIdnum=(int)(arr[0]); tempBase=arr[1]; tempSales=arr[2]; tempRate=arr[3]; Employee obj(int tempIdNum, double tempBase, double tempSales, double tempRate); emp[tempcount]=obj; inc+=4; tempcount++; } readFile.close(); } Here is some more from my h file #include <string> include "Commission.h" using namespace std; ifndef Company_H define Company_H class Company{ private: string name; //name of company Employee emp[4]; //array of payrool info about 4 commission employees int numEmp; //number of employees public: Company(); Company(string name, string fileName); ~Company(); string getName(); Commission getEmployee(int element); int getNumEmp(); }; endif enter code here Does not compile: 46 E:\exercise2\Company.cpp no match for 'operator=' in '((Company*)this)-Company::emp[tempcount] = obj'

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  • mysql query that has array

    - by Xainee Khan
    //get all id's of ur friend that has installed your application $friend_pics=$facebook->api( array( 'method' => 'fql.query', 'query' => "SELECT uid FROM user WHERE uid IN(SELECT uid2 from friend WHERE uid1='$user') AND is_app_user = 1" ) ); // this query work fine //your top10 friends in app $result="SELECT * FROM fb_user WHERE user_id IN($friend_pics) ORDER BY oldscore DESC LIMIT 0,10"; db_execute($result); i want to retrive ten top scorer from my database stored in oldscore but in my second query the array name $friend_pics is not working i guess,plz help me thanks

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