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• Is it possible to match with decomposed sequences in F#?

  - by Ball

  I seem to remember an older version of F# allowing structural decomposition when matching sequences just like lists. Is there a way to use the list syntax while keeping the sequence lazy? I'm hoping to avoid a lot of calls to Seq.head and Seq.skip 1. I'm hoping for something like: let decomposable (xs:seq<'a>) = match xs with | h :: t -> true | _ -> false seq{ 1..100 } |> decomposable But this only handles lists and gives a type error when using sequences. When using List.of_seq, it seems to evaluate all the elements in the sequence, even if it is infinite.

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• Proguard shrinks too much

  - by vRallev

  Since ADT 17 you can find in the gen folder a BuildConfig class with a DEBUG constant. I often use this constant in my code, since ADT changes the value automatically when you export the application. However with Proguard this doesn't work anymore. E.g. I have following snippet: if (!BuildConfig.DEBUG) { ACRA.init(this); } Proguard notices, that DEBUG is true, so it removes this snippet completely and shrinks the app. After that ADT changes DEBUG constant, but this is too late. The only solution I know is to create my own DEBUG constant and to change it manually again. But I really like the functionality of ADT. Do you know a better solution? Thanks in advance.

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• Java Hibernate Lazy=false

  - by Noor

  When setting Lazy=false, then hibernate will automatically loads the objects into the required sets e.g. <set name="Options" table="ATTRIBUTEOPTION" inverse="false" cascade="all" lazy="false"> <key> <column name="ATTRIBUTEID" /> </key> <one-to-many class="com.BiddingSystem.Models.AttributeOption" /> </set> but if in my xml mapping, I place lazy=true and in some place in my application i decide that i want to load all attribute options, should i do it manually, or is there a technique which lets tells hibernate that now i want to set lazy=false??

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• Taking screen shot of a SurfaceView in android

  - by Mostafa Imran

  I am using following method to taking screen shot of a particular view which is a SurfaceView. public void takeScreenShot(View surface_view){ // create bitmap screen capture Bitmap bitmap; View v1 = surface_view; v1.setDrawingCacheEnabled(true); bitmap = Bitmap.createBitmap(v1.getDrawingCache()); v1.setDrawingCacheEnabled(false); ByteArrayOutputStream bos = new ByteArrayOutputStream(); bitmap.compress(CompressFormat.PNG, 0, bos); byte[] imageData = bos.toByteArray(); } the problem is its giving me the whole activity screen image. But I need to take screen shot of the particular view. I tried other ways but those give me a black screen as screen shot, some posts says that it requires rooted device. Can any one help me please. I'm in need of this solution. Help me....

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• Erlang: configuring cover via rebar

  - by exterm

  My project is using a websocket server. Only for testing purposes, I also have an erlang websocket client implementation which resides in the test/ folder along with the tests. Now, when I run the tests via rebar with {cover_enabled, true} in my rebar.config, I also get coverage reported for the modules of the websocket client. I don't want this in my reports. Cover documentation says I should create a cover specification file containing {excl_mods, [websocket_client]}. But how do I convince rebar to use this file? Cover documentation: http://www.erlang.org/doc/apps/common_test/cover_chapter.html http://www.erlang.org/doc/man/cover.html rebar: https://github.com/basho/rebar

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• Anonymous code blocks in Groovy

  - by piepera

  Is there a way to use anonymous code blocks in Groovy? For example, I'm trying to translate the following Java code into Groovy: { int i = 0; System.out.println(i); } int i = 10; System.out.println(i); The closest translation I can come up with is the following: boolean groovyIsLame = true; if (groovyIsLame) { int i = 0; System.out.println(i); } int i = 10; System.out.println(i); I know anonymous code blocks are often kind of an antipattern. But having variables with names like "inputStream0" and "inputStream1" is an antipattern too, so for this code I'm working on, anonymous code blocks would be helpful.

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• JavaScript using toString on a Function object to read text content

  - by mseeley

  Calling toString() on the function below returns different strings across browsers. I understand this is because ECMA-262 15.3.4.2 leaves wiggle room for each vendor. Chrome returns the comments in addition to all syntax. Sadly Firefox 3.6 omits the comments. Based on Firefox's behavior I haven't tested IE, Opera, or Safari. function foo() { /* comment */ var bar = true; } Specifically, I am attempting to embed meta data within a specially formatted comment block within a function. Later the return value of the functions toString() method would be parsed and values returned as an object. I've been unable to locate compatibility tables or alternatives to toString(). Does the community have any ideas? Btw, pre-processing JS files isn't an option. :( Thanks a lot. :)

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• django url tag performance

  - by zxygentoo

  I was trying to integrate django-voting into my project following the RedditStyleVoting instruction. In my urls.py, i did something like this: url(r'^sections/(?P<object_id>\d+)/(?P<direction>up|down|clear)vote/?$', vote_on_object, dict( model=Section, template_object_name='section', template_name='script/section_confirm_vote.html', allow_xmlhttprequest=True ), name="section_vote", then, in my template: {% vote_by_user user on section as vote %} {% score_for_object section as score %} {% vote_by_user user on section as vote %} {% score_for_object section as score %} {{ score.score|default:0 }} It takes over 1.3s to load the page, but by hard coding it like this: {% vote_by_user user on section as vote %} {% score_for_object section as score %} {{ score.score|default:0 }} I got 50ms. Just avoid the url tag resolving stuff I got a 20+ times performance improvement. Is there something I did wrong? If not, then what's the best practice here, should we do things the right way or the fast way?

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• how to read integers from file and write each integer into different name integer?

  - by Aivaras

  This is how the program looks and i need to make all integers with different name. Like x,x1,x2 and so on... #include <cstdlib> #include <iostream> #include <fstream> using namespace std; int main() { ifstream iFile("input.txt"); // input.txt has integers, one per line while (true) { int x; iFile >> x; if( iFile.eof() ) break; cerr << x << endl; } system("Pause"); return 0; }

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• Php code not executing - dies out when trying to refer to member of static class - no error displaye

  - by Ali

  I'm having some problems with this piece of code. I've included a class declaration and trying to create an object of that class but my code dies out. It doesn't seem to be an include issue as all the files are being included even the files called for inclusion within the class file itself. However the object is not created - I tried to put an echo statement in the __construct function but nothing it just doesn't run infact doesn't create the object and the code won't continue from there - plus no error is reported or displayed and I have error reporting set to E_ALL and display errors set to true WHats happening here :( =============EDIT SOrry I checked again the error is prior to teh object creation thing - it dies out when it tries to refer to a constant in a static class like so: $v = Zend_Oauth::REQUEST_SCHEME_HEADER; THis is the class or part of it - it has largely static functions its the Zend Oauth class: class Zend_Oauth { const REQUEST_SCHEME_HEADER = 'header'; const REQUEST_SCHEME_POSTBODY = 'postbody'; const REQUEST_SCHEME_QUERYSTRING = 'querystring'; // continued LIke I said no error is being reported at all :(

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• mysql data being inserted twice via php

  - by Jascha

  I can't for the life of me figure out why this function is causing multiple entries into my database table... When I run the function I end up with two records stacked on top of each one second apart here is the function: function generate_signup_token(){ $connection = new DB_Connect(); // <--- my database connection class $ip = mysql_real_escape_string($_SERVER['REMOTE_ADDR']); $sign_up_token = uniqid(mt_rand(), true); $_SESSION['signup_token'] = $sign_up_token; $sign_up_token = mysql_real_escape_string($sign_up_token); $query = "INSERT INTO `token_manager` (`ip_address`, `signup_token`) VALUES ('$ip', '$sign_up_token')"; mysql_query($query); } generate_signup_token();

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• Buttons with equal heights.

  - by Rpond

  Linear layout below. This layout is aligned parent bottom in a Relative Layout. Problem is I want all buttons to have the same height. I have tried layout_gravity="fill" but that doesn't seem to work. <LinearLayout android:id="@+id/button_layout" android:layout_height="wrap_content" android:layout_width="fill_parent" android:background="#FFFFFF" android:layout_alignParentBottom="true"> <Button android:text="Send" android:id="@+id/send_button" android:layout_weight="1" android:layout_gravity="fill" android:layout_width="0dip" android:layout_height="wrap_content"> </Button> <Button android:text="Report Missing Image" android:id="@+id/report_button" android:layout_weight="1" android:layout_width="0dip" android:layout_height="wrap_content"> </Button> <Button android:text="Close" android:id="@+id/close_button" android:layout_weight="1" android:layout_gravity="fill" android:layout_width="0dip" android:layout_height="wrap_content"> </Button> </LinearLayout>

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• How can I communicate between Windows 8 and WP8 apps using ssl?

  - by Clay Shannon

  I'm considering using either raw notifications (WNS) or sockets for communication between a Windows 8 and WP8 app. I've found some samples for using sockets but my question[s] here are: does WP8 support sending/receiving messages over ssl and, if so, how is it done? Something I need to be true or find a workaround for is that the Windows 8 app has a permanent IPAddress to which the phone app will send its updates. Typically, a tablet will be running Windows 8 app, always listening for incoming messages; the phone app will periodically send messages.

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• problem using default_scope on a model table

  - by DannyRe

  Hey. In my controller/index action I use the following query: @course_enrollments = current_user.course_enrollments This is what my table looks like. It is referencing a course table. The course table has a colum 'title'. create_table "course_enrollments", :force => true do |t| t.integer "user_id", :null => false t.integer "course_id", :null => false t.datetime "created_at" t.datetime "updated_at" end I want to be able to order my course_enrollments by course in my index view. Furthermore Id like to do a default_scope in my model, like this: default_scope :order => 'title asc' any suggestions? Thx for your time

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• How to highlight ListView item on touch?

  - by AndroidNoob

  I have a simple ListView and I want each of it items to be highlighted on user's touch. I thought this should happen by default but it isn't. Can you advice? ListView xml: <ListView android:id="@+id/list_view" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="10dp" android:divider="#206600" android:dividerHeight="2dp" android:smoothScrollbar="true" android:background="#ffffff" > </ListView> And code of my Adapter: private class MyAdapter extends ArrayAdapter<Task> { private LayoutInflater mInflater; public MyAdapter(Context context, int resource, List<Task> list) { super(context, resource, list); mInflater = LayoutInflater.from(context); } @Override public View getView(int position, View convertView, ViewGroup parent) { View v = convertView; if (v == null) { v = mInflater.inflate(R.layout.list_item, null); } Task task = taskList.get(position); /* Setup views from your layout using data in Object here */ return v; }

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• ModelName(django.contrib.auth.models.User) vs ModelName(models.Model)

  - by amr.negm

  I am developing a django project. I created some apps, some of those are related to User model, for instance, I have a feeds app that handles user feeds, and another app that deals with extra user data like age, contacts, and friends. for each of these, I created a table that should be connected to the User model, which I using for storing and authenticating users. I found two ways to deal with this issue. One, is through extending User model to be like this: ModelName(User): friends = models.ManyToMany('self') ..... Two, is through adding a foreign key to the new table like this: ModelName(models.Model): user = models.ForeignKey(User, unique=True) friends = friends = models.ManyToMany('self') ...... I can't decide which to use in which case. in other words, what are the core differences between both?

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• HTML/Javascript Strange behavior with input field and TABBING

  - by Berlin Brown

  I have a strange error where if a user enters in data, say first name and then tabs, the text in the field is highlighted/selected as opposed to moving to the next. So, a person may type the first name and then tab to the next input item, text is selected and then they hit a character and now the name they typed in is deleted. If I use the default [input] tags, the tab works properly. But in the code below, with keyup, that may change the tabbing behavior. How can I get my code where it won't select the text. This is replicated in Firefox and Internet Explorer. function enableSearch(lnameObj) { var goButtonObj = document.getElementById('goButton'); var nextButtonObj = document.getElementById('nextButton'); var lastName = lnameObj.value; if (lastName == "") { goButtonObj.disabled = true; } else { goButtonObj.disabled = false; } } <input type="text" size="12" name="lastname" onKeyUp="return enableSearch(this);" value="">

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• Parsing a comma-separated list

  - by alex

  I have a comma-separated list of values, for example: strins s = "param1=true;param2=4;param3=2.0f;param4=sometext;"; I need a functions: public bool ExtractBool(string parameterName, string @params); public int ExtractInt(string parameterName, string @params); public float ExtractFloat(string parameterName, string @params); public string ExtractString(string parameterName, string @params); Is there a special functions in .net that can help me with csl ? PS: parameter names are equal within a list.

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• Filter records based on Date Range + ASP.NET + Regex + Javascript

  - by ASIF

  Hi I need to filter data based on a date range. My table has a field Process date. I need to filter the records and display those in the range FromDate to ToDate. How do I write a function in VB.NET which can help me filter the data. Protected Shared Function ObjectInRange(ByRef obj As Object, ByVal str1 As String, ByVal str2 As String) As Boolean Dim inRange = False For Each prop As PropertyInfo In obj.GetType().GetProperties() Dim propVal = prop.GetValue(obj, Nothing) If propVal Is Nothing Then Continue For End If Dim propValString = Convert.ToString(propVal) If Regex....WHAT GOES HERE? Then inRange = True Exit For End If Next Return inRange End Function Am I on the right track??

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• Passing an empty IEnumerable argument to a method

  - by avance70

  I have this method (simplified): void DoSomething(IEnumerable<int> numbers); And I invoke it like this: DoSomething(condition==true?results:new List<int>()); The variable results is formed with a LINQ select condition (IEnumerable). I was wondering is this List<int>() the best way (the fastest?) to pass an empty collection, or is new int[0] better? Or, something else would be faster, a Collection, etc.? In my example null wouldn't be ok.

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• Whats the API Key for in Google Maps API V3?

  - by Brandon

  In the older version of the API, I'd have to insert the javascript into the page using something like this for just basic functionality to work: http://maps.google.com/maps?file=api&v=2&key=GoogleMapsAPIKey Where I had to configure the API key for each individual site. Looking at the documentation, it says to get a basic map working I just need this: http://maps.google.com/maps/api/js?sensor=true/false Where does the API key fit in? Do I need to worry about it if I just plan on using a basic map and marker and none of the more advanced functions?

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• OnPaint event during a callback when the form is below?

  - by Martín Marconcini

  Imagine the following scenario: this.SetStyle(ControlStyles.UserPaint, true); //this doesn’t change anything … void OpenSomeForm() { SomeForm sf = new SomeForm(); sf.SomeEvent += new … (SomeEventOcurred); sf.ShowDialog(); } private void SomeEventOcurred(…) { OnePanelInThisForm.Invalidate(); } private void OnePanelInThisForm_Paint(object sender, PaintEventArgs e) { DoSomeDrawing(e.Graphics); } Now, OnePanelInThisForm draws correctly when the form loads. But if SomeEventOcurred is Fired from “SomeForm”, the paint event is not fired. If I close and reopen the form it correctly repaints. If I add a button to the form that executes: OnePanelInThisForm.Invalidate(); the panel is correctly repaint. What am I missing?

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• Passing variable string to create arrays (Android)

  - by dweebsonduty

  Hello all, I am a newb to Android and Java and want to write a funtion that will display a list based on a varable that I pass to the function. The function is below and the code below creates an array out of a string called type, but what I want to do is pass it a variable string and have it build a list based on that string. So if I wanted the type list I would say list_it("type") But if I try something like getResources().getStringArray(R.array.thelist); it doesn't work. Can someone point me in the right direction? public void list_it(String thelist){ String[] types = getResources().getStringArray(R.array.type); ArrayAdapter<String> mAdapter = new ArrayAdapter<String>(this, R.layout.list_item1, types); setListAdapter(mAdapter); ListView lv = getListView(); lv.setTextFilterEnabled(true); }

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• How to determine the inner context node within an XSLT select

  - by Marcus Rickert

  Hi there! I'm trying to determine a subset of nodes stored in the variable objs by using a user defined function cube:is_active: <xsl:variable name="active_cubes" select="$objs[cube:is_active(XXX) = 'TRUE']"/ Since the function does not allow a local context I'm required to pass it as a parameter (denoted by XXX). However, the usual suspects "." or "current()" do not work since they refer to context node of the surrounding block and NOT to the current element of objs which is evaluated. The only solution so far which DOES work is: XXX=SOME_CHILD_TAG/.. But this is really ugly since it depends on the existence of the child tag for the parent node to work correctly. Is there any other way? Thanks!

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• Asp.Net Error Message:Unable to validate data

  - by Amitabh

  We have a Asp.Net Webform page which contains a GridView inside UpdatePanel and refreshes every minute. And every one minute we get the following error in Event log. Error Message:Unable to validate data. Stack Trace: at System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString). We have tried the following. Adding a static machine key in the Web.Config. (Did not work?) Disabling the View State Mac in the Web,.Config using following entry. (Did not work) <pages buffer="true" enableViewStateMac="false"> Is there something else that might cause this?

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