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  • How to select random image of specific size using Django / Python?

    - by Jonathan
    I've been using this little snippet to select random images. However I would like to change it to select only images of a certain size. I'm running into trouble checking against image size. If I use get_image_dimensions() I need to use a conditional statement, which then requires that I allow exceptions. So, I guess I need some pointers on just limiting by image dimensions. Thanks. import os import random import posixpath from django import template from django.conf import settings register = template.Library() def is_image_file(filename): """Does `filename` appear to be an image file?""" img_types = [".jpg", ".jpeg", ".png", ".gif"] ext = os.path.splitext(filename)[1] return ext in img_types @register.simple_tag def random_image(path): """ Select a random image file from the provided directory and return its href. `path` should be relative to MEDIA_ROOT. Usage: <img src='{% random_image "images/whatever/" %}'> """ fullpath = os.path.join(settings.MEDIA_ROOT, path) filenames = [f for f in os.listdir(fullpath) if is_image_file(f)] pick = random.choice(filenames) return posixpath.join(settings.MEDIA_URL, path, pick)

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  • deleting and reusing a temp table in a stored precedures

    - by Sheagorath
    Hi I need to SELECT INTO a temp table multiple times with a loop but I just can't do it, because after the table created( in SELECT into you can't simply drop the table at the end of the loop because you can't delete a table and create it again in the same batch. so how can I delete a table in a stored procedure and create it again? here is a snippet of where I am actualy using the temp table which is supposed to be a pivoting algorithm: WHILE @offset<@NumDays BEGIN SELECT bg.*, j.ID, j.time, j.Status INTO #TEMP1 FROM #TEMP2 AS bg left outer join PersonSchedule j on bg.PersonID = j.PersonID and bg.TimeSlotDateTime = j.TimeSlotDateTime and j.TimeSlotDateTime = @StartDate + @offset DROP TABLE #TEMP2; SELECT * INTO #TEMP2 FROM #TEMP1 DROP TABLE #TEMP1 SET @offset = @offset + 1 END

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  • Password Protected Android App

    - by Caution Continues
    I wana make a security app and in case of stolen or lost my app must not be uninstalled without taking password. yes It is possible to make such an app that can take password before getting uninstall.. My friend Aditya Nikhade has made this app :) .But he is not giving me this secrete recipe:( Install this app Findroid from google Play. In this app first you need to unlock your app then only u can uninstall it. So please help me how to crack this technique.. I searched and got some incomplete answer in that we can declare a receiver of type PACKAGED_REMOVED but i want to know how can I stop if my app is being uninstalled. I am little close to solution of it. I am working/studying on Device Administrator. Please paste code snippet if anyone have. Thanks a Ton in advanced....!!!

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  • Setting Hyperlink to a Javascript Url (using the DataNavigateUrlFormatString property)

    - by Jangwenyi
    I have an issue where my Hyperlink field in Asp.net GridView is not accepting Javascript function that will open a popup dialog. I am using the following snippet <asp:GridView .... . . <asp:HyperLinkField DataTextField="SomeColumn" HeaderText="Some Column Text" SortExpression="SomeColumn" HeaderStyle-HorizontalAlign="Left" DataNavigateUrlFormatString="javascript:LaunchSomePopupdialog({0})" DataNavigateUrlFields="Id" ItemStyle-Font-Underline="true"> . . </asp:GridView> However, when I use a page url, it works: E.g. DataNavigateUrlFormatString="~/SomeOtherPage.aspx?Id={0}" Is there a way I can make this work with my Javascript function?

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  • inputMismatchException Java reading doubles from plain text file

    - by user939287
    Using double variable = inputFile.nextDouble(); Gives the mismatch error and I can't figure out why... Anyone know what's up? The input file is just a bunch of doubles like 5.0... Okay here is the code snippet String fileName; Scanner scanner = new Scanner(System.in); System.out.println("\nEnter file name that contains the matrix and vector: "); fileName = scanner.nextLine(); Scanner inputFile = new Scanner(fileName); double a1 = inputFile.nextDouble(); the input file is a plain text document .txt in this format 5.0 4.0 -3.0 4.0 2.0 5.0 6.0 5.0 -2.0 -13.0 4.0 12.0 I don't understand why it wouldn't take those as doubles... As far as what its expecting the format of the file to be... I suppose binary? isn't that the default? I didn't specify in the code...

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  • xml parsing takes extra spaces.

    - by SDK
    I have been trying to write/parse xml file in python. The tags are very simple <main> <data> abcdef </data> </main> I have written this xml using xml document writer from xml.dom.minidom. How-ever when i try to parse this and try to fetch data-text value, i get 'abcdef' with spaces/carriage return/newline characters in beg and end. Does parsing does not take of indenting spaces? Following is the parsing snippet (ref from net) dom = parseString(data) clipTag = dom.getElementsByTagName('clipdata')[0].toxml() clipData=clipTag.replace('<clipdata>','').replace('</clipdata>','') Kindly suggest.

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  • Facebook | redirect error

    - by MMRUser
    I have facebook connect button on a page of my site and I want user to redirect to a page after a successful login: here's the code snippet: </script> <fb:login-button onlogin="facebook_onlogin();"> </fb:login-button> <script type="text/javascript"> FB.init("API_KEY", "http://myip/facebookapp/xd_reciver.html/"); function facebook_onlogin() { window.location="http://myip/facebookapp/mypage/" } </script> But when I logged in it redirects to the page INSIDE the pop-up, how can I redirect to the page out side of the popup..

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  • C# massive insertion into data structures

    - by Seabass
    In C#, you can do the following: List registers = new List { 1, 2, 3, 4 }; This will produce a list with 1, 2, 3, and 4 in the list. Suppose that I am given a list from some function and I want to insert a bunch of numbers like the following: List register = somewhere(); register.Add(1); register.Add(2); register.Add(3); register.Add(4); Is there a cleaner way of doing this like the snippet above?

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  • the problem of redirecting stdout in c#

    - by Mher
    Could you please explain why the shell redirection doesn't work with System.Diagnostics.Process class? I am trying to redirect the output streams to file with the following snippet: Process p = new Process(); p.StartInfo = new ProcessStartInfo(); p.StartInfo.FileName = "java.exe"; p.StartInfo.Arguments = @"> c:\Temp\test.log 2>&1"; p.StartInfo.UseShellExecute = true; p.Start(); The similar code works without problems with Python. Reading the output streams programmatically doesn't seem a preferable solution in my case because there will be a bunch of processes launched by my application.

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  • Can I expand macro JUST ONE TIME in specific target?

    - by naive231
    A = "demo" %.o:%.cpp $(CC) -c $^ $(A) -o $@ default:$(all_objs) game:A = $(shell read -p 'Enter game version: ' gv && echo $$gv) game:$(all_objs) Just a snippet makefile above. If I make game, main problem is each compilation of sources will expand $(A) and it will request user to input game version over and over. $(A) has default content "demo" only if user doesn't make game target. So, is there any way to set $(A) to be expanded && ?

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  • A better and faster way for eval?

    - by user1707250
    I want to build my queries dynamically and use the following snippet: --snip-- module.exports = { get : function(req, res, next) { var queryStr = "req.database.table('locations').get(parseInt(req.params.id))"; if (req.params.id) { if (req.fields) { queryStr += '.pick(' + req.fieldsStr + ')'; } console.log(queryStr); eval(queryStr).run(function(result) { console.log(result); res.send(result); }); } else if (!req.params.id) { --snip-- However introducing eval opens up my code to injection (req.fields is filled with url parameters) and I see the response time of my app increase from 7 to 11ms Is there a smarter way to accomplish what I did here? Please advice.

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  • How to get the default value of a column of MS Access Database using C++?

    - by user198750
    This is the sql script I used to create a table in MS Access Database. CREATE TABLE Contracts ( id int NULL DEFAULT 0, sex varchar(255) DEFAULT 'female' NOT NULL ) Now I want to programmatically get the default value of the field: "sex", I know it's 'female' but I don't know how to get it using C++ ADO interface. Below is a snippet of my code: m_pRecordset->Fields->get_Item(vIntegerType, &pvObject); bstrColName = pvObject->GetName(); dtype = pvObject->GetType(); attr = pvObject->GetAttributes();

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  • Using regex to strip out certain data from HTML code via PHP

    - by Chris
    I have the following HTML snippet <tr> <td class="1">...</td> <td class="2">...</td> <td class="3">...</td> <td class="4">...</td> </tr> etc... I basically have N rows, and each row contains 4 TD's each with a unique class. I would like a simple way to split out all the rows and TD's by class so I can choose what data I want to use. I expect the easiest way to achieve this would be regex (maybe two). One to split up the TR's then another to split up the TDs (by class preferably) Thanks

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  • Changing a Widget's name based on a string read in from an XML form in Qt.

    - by Nick
    I'm writing a code for a voting machine that will allow user to read in custom XML ballots and then vote on them, however in the current build I have in QtCreator, I don't see an easy way to edit buttons in my GUI directly. In the code snippet below, I assign an element to pull out the names and type of ballot being read in, but I need to append a label on the GUI as well as change buttons to the names of candidates read in. Any ideas on how to do this? while(!n.isNull()){ QDomNode x = n.firstChildElement(); QDomElement e = n.toElement(); QMessageBox::information(0, tr( "Loading Element" ), tr( "Our element is %1" ).arg(e.tagName()) ); QDomElement p = x.firstChildElement();//p finds Races QMessageBox::information(0,tr("Foo"),tr("p = %1").arg(p.text()));//finds Race and Ballot types n = n.nextSibling(); } }

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  • How can I find if an arbitrary process is running under wow64?

    - by LCC
    I need a tool which will discover whether an arbitrary process is running in x86 or x64 mode on a machine. I need to do this programatically from C++, based on a process ID. There has to be some way to do this (as you can clearly see it from the task manager). Does anyone know of a windows api that will tell you, given a process ID, whether the application is running under wow64? Another approach would be to figure out, based on the process id, the executable name/path that is running and try to read the PE headers out of the file. Does anyone have a code snippet that would accomplish that?

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  • array of objects of a class

    - by anurag18294
    #include class test{ int a; char b; public: test() { cout<<"\n\nDefault constructor being called"; } test(int i,char j) { a=i; b=j; cout<<"\n\nConstructor with arguments called"; } }; int main() { test tarray[5]; test newobj(31,'z'); }; In the above code snippet can we intialize values to tarray[5].

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  • Problem with non-copyable classes

    - by DeadMG
    I've got some non-copyable classes. I don't invoke any of the copy operators or constructor, and this code compiles fine. But then I upgraded to Visual Studio 2010 Ultimate instead of Professional. Now the compiler is calling the copy constructor- even when the move constructor should be invoked. For example, in the following snippet: inline D3D9Mesh CreateSphere(D3D9Render& render, float radius, float slices) { D3D9Mesh retval(render); /* ... */ return std::move(retval); } Error: Cannot create copy constructor, because the class is non-copyable. However, I quite explicitly moved it.

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  • Can this be solved by using just regex?

    - by Lost_in_code
    I need to convert $text = 'We had <i>fun</i>. Look at <a href="http://example.com">this photo</a> of Joe' to $text = 'We had fun. Take a look at this photo (http://example.com) of Joe' All HTML tags are to be removed and the href value from <a> tags needs to be added like above. What would be an efficient way to solve this? Any code snippet would be great.

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  • VB to c++ or c#?

    - by hilzmas
    I am trying to translate this code but I don't understand how to use the GET / PUT part of the code in another language like c++ or c#. This is the code : Private Sub cmd_Click() Dim i As Integer, a As Integer a = 10 For i = 1 To a Dim file As String Open "txt" For Binary As #1 file = Space(LOF(1)) Get #1, , file Close #1 Randomize Open "txtpath" & "\" & i & "txtname" For Binary As #1 Put #1, , file Put #1, , Rnd Close #1 Next i End Sub The code could have bug because I replaced variables with plain text. What I understand is that the code get a file and then save it with some random data added to make it look different than the original. I don't use vb since years and I don't remember anything about it. Can someone help me porting this snippet to c++ or c#?

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  • Why does my Image stretch when I crop it?

    - by q234e
    I am using the following code snippet in order to crop a image? function crop($width,$height) { $new_image = imagecreatetruecolor($width, $height); imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $this->getWidth(), $this->getHeight(), $width, $height ); $this->image = $new_image; } Here, $this->image is the original image $this->getWidth() and $this->getHeight() holds the original dimensions of the picture, where as $width and $height, is the crop area. But for some reason, the crop image is resized(we can almost say it is resized). How to fix this?

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  • Getting an Ajax response from Zend Framework Controller

    - by JavaLava
    I'm doing an Ajax request on one of my views to a Controller but I am unable to send back a response to the Ajax method. In the snippet below, I am trying to send the word 'hellopanda' back but in the alert message, I'll get data as an object. View : $.ajax({ type: "POST", url: "localhost/some-activity", data: dataString, success: function(data) { alert( "Data is: " + data); //do something with data }, error: function(data){ alert( "Data is: " + data); //do something with data }, onComplete: function(){ } }); Controller: public function someActivityAction(){ //do stuff echo "hellopanda"; } I'm pretty sure the echo is the problem. Any insights on to how to do a proper response to the view would be greatly appreciated.

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  • How come $(this) is undefined after ajax call

    - by JohnnyQ
    I am doing an ajax request when an anchor tag is clicked with an ID set to href. Btw, this anchor tag is dynamically created. <a href="983" class="commentDeleteLink">delete</a> When the anchor tag is clicked the following code is executed: $('.commentDeleteLink').live('click', function(event) { event.preventDefault(); var result = confirm('Proceed?'); if ( result ) { $.ajax({ url: window.config.AJAX_REQUEST, type: "POST", data: { action : 'DELCOMMENT', comment : $('#commentText').val(), comment_id : $(this).attr('href') }, success: function(result) { alert($(this).attr('href')); //$(this).fadeOut(slow); } }); } }); When I tried to display $(this).attr('href') it says it's "undefined". What I really want to do is fadeOut the anchor tag but when I investigated the value of $(this) it is "undefined". What could be wrong with the snippet above?

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  • Eliminating inherited overlong MACRO

    - by ExpatEgghead
    I have inherited a very long set of macros from some C algorithm code.They basically call free on a number of structures as the function exits either abnormally or normally. I would like to replace these with something more debuggable and readable. A snippet is shown below #define FREE_ALL_VECS {FREE_VEC_COND(kernel);FREE_VEC_COND(cirradCS); FREE_VEC_COND(pixAccum)..... #define FREE_ALL_2D_MATS {FREE_2D_MAT_COND(circenCS); FREE_2D_MAT_COND(cirradCS_2); } #define FREE_ALL_IMAGES {immFreeImg(&imgC); immFreeImg(&smal..... #define COND_FREE_ALLOC_VARS {FREE_ALL_VECS FREE_ALL_2D_MATS FREE_ALL_IMAGES} What approach would be best? Should I just leave well alone if it works? This macro set is called twelve times in one function. I'm on Linux with gcc.

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  • Merging elements in a scala list

    - by scompt.com
    I'm trying to port the following Java snippet to Scala. It takes a list of MyColor objects and merges all of the ones that are within a delta of each other. It seems like a problem that could be solved elegantly using some of Scala's functional bits. Any tips? List<MyColor> mergedColors = ...; MyColor lastColor = null; for(Color aColor : lotsOfColors) { if(lastColor != null) { if(lastColor.diff(aColor) < delta) { lastColor.merge(aColor); continue; } } lastColor = aColor; mergedColors.add(aColor); }

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  • conversions in C++

    - by lego69
    I have this snippet of the code: header class A { private: int player; public: A(int initPlayer = 0); A(const A&); A& operator=(const A&); ~A(); void foo() const; friend A& operator=(A& i, const A& member); }; operator= A& operator=(A& i, const A& member){ i(member.player); return i; } and I have row in my code: i = *pa1; A *pa1 = new A(a2); at the beginning i was int how can I fix it, thanks in advance I have an error must be non-static function

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