Newbe Dev Stack

Answer : I don't think any of the answers are very clear. Neither explains that problem is that the callback given to on_press gets called with a parameter, the instance of button, so LoginScreen.auth must accept a parameter after the self : def auth(self, button): print('button pressed:', instance) The problem is not that on_press must be given via Button.bind or that the callback must be a function, it can be a bound method, and the docs cited by other answer and by comments link to ButtonbBhavior which indicates that OP use of on_press in constructor was fine: self.hello = Button(text="hello", on_press=self.auth) would have worked if auth had been as described above. If you read the Button documentation, the key seems to be to use the bind function: def callback(instance): print('The button <%s> is being pressed' % instance.text) btn1 = Button(text='Hello world 1') btn1.bind(on_press=callback)

Answer : Try zip -F science_team_meeting_archive.zip -O science_team_meeting_archive.fixed.zip If that doesn't work, you just need more 'F's zip -FF science_team_meeting_archive.zip -O science_team_meeting_archive.fixed.zip If either of these work, you then unzip normally with: unzip science_team_meeting_archive.fixed.zip For more info about this, use: man zip 7z x I had the same issue with unzip %x on Linux for a .zip file larger than 4GB, compounded with a only DEFLATED entries can have EXT descriptor error. The command 7z x resolved all my issues though. Be careful though, the command 7z x will extract all files with a path rooted in the current directory. The option -o allows to specify an output directory.

Example 1: call javascript function from php // The most basic method <?php echo '<script type="text/javascript">' , 'someJsFunc();' , // Or Whatever '</script>' ; ?> // However, if what you are trying to achieve requires more complexity, // You might be better off adding the V8JS module, see link below Example 2: call php function in js < script > var phpadd = <?php echo add ( 1 , 2 ) ; ?> //call the php add function var phpmult = <?php echo mult ( 1 , 2 ) ; ?> //call the php mult function var phpdivide = <?php echo divide ( 1 , 2 ) ; ?> //call the php divide function </ script >

Example 1: call instance class python # define class class example : # define __call__ function def __call__ ( self ) : print ( "It worked!" ) # create instance g = example ( ) # when attempting to call instance of class it will call the __class method g ( ) # prints It worked! Example 2: making an instance of a class in puython #!/usr/bin/python class Employee : 'Common base class for all employees' empCount = 0 def __init__ ( self , name , salary ) : self . name = name self . salary = salary Employee . empCount += 1 def displayCount ( self ) : print "Total Employee %d" % Employee . empCount def displayEmployee ( self ) : print "Name : " , self . name , ", Salary: " , self . salary "This would create first object of Employee class" emp1 = Employee ( "Zara" , 2000 ) "This would create second object of Empl...

Example: else if python if ( condion ) : result elif ( condition ) : results else : result

Answer : Any rigid framework, hence all regular polygons, can be converted to a triangle-free equivalent. Simply chaining copies of the 12 12 12 -vertex triangle-free braced square shown in the question (which I discovered) along the two collinear edges gives a rigid line segment of arbitrary whole number length without triangles: Then any triangular grid can be mimicked without triangles as follows (all straight fuchsia edges are made with the graph chaining construction above, all black edges are single sticks): For example, to brace the hexagon without triangles: However, the above hexagon bracing is quite big. Another approach to triangle-free bracing is the virtual edge : in any embedding of the cubical graph with one edge removed, the distance between the two degree- 2 2 2 vertices (incident to the missing edge) must always be 1 1 1 . This leads to the following triangle-free rigid regular hexagon in 16 16 16 vertices and 29 29 29 edges (Shibuya commit proof): Th...

Example 1: android toolbar with menus @Override public boolean onCreateOptionsMenu ( Menu menu ) { getMenuInflater ( ) . inflate ( R . menu . main_menu , menu ) ; return true ; } Example 2: android toolbar example < ? xml version = "1.0" encoding = "utf-8" ? > < LinearLayout xmlns : android = "http://schemas.android.com/apk/res/android" android : layout_width = "match_parent" android : layout_height = "match_parent" android : background = "@android:color/white" > < android . support . v7 . widget . Toolbar android : id = "@+id/toolbar" android : layout_width = "match_parent" android : layout_height = "58dp" android : background = "?attr/colorPrimary" android : minHeight = "?attr/actionBarSize" android : titleTextColor = "#ffffff" > < / android . support . v7 . widget . Toolbar > < / LinearLayout > ...

Example 1: how to filter object in javascript // use filter() function. Let say we have array of object. let arr = [ { name : "John" , age : 30 } , { name : "Grin" , age : 10 } , { name : "Marie" , age : 50 } , ] ; //Now I want an array in which person having age more than 40 is not //there, i.e, I want to filter it out using age property. So let newArr = arr . filter ( ( person ) => ( return person . age <= 40 ) ) ; //filter function expects a function if it return true then it added //into new array, otherwise it is ignored. So new Array would be /* [ {name: "John", age: 30}, {name: "Grin", age: 10}, ] */ Example 2: how to filter an array of objects in javascript let arr = [ { id : 1 , title : 'A' , status : true } , { id : 3 , title : 'B' , status : true } , { id : 2 , title : 'xys' , status : true } ] ; //find where title=B let x = arr . filter ( ( a ) ...

Example 1: armstrong number sum of cubes of the digits Example 2: armstrong number temp=n; while(n>0) { r=n%10; sum=sum+(r*r*r); n=n/10; } if(temp==sum) printf("armstrong number "); else printf("not armstrong number"); return 0; Example 3: Armstrong number Enter the Number:

Example 1: circle avatar from image asset flutter CircleAvatar ( radius : 16.0 , child : ClipRRect ( child : Image . asset ( 'profile-generic.png' ) , borderRadius : BorderRadius . circular ( 50.0 ) , ) , ) , Example 2: how to make an image contained in circle avatar in flutter CircleAvatar ( radius : 30.0 , backgroundImage : NetworkImage ( "${snapshot.data.hitsList[index].previewUrl}" ) , backgroundColor : Colors . transparent , )

Example 1: latex bold text \textbf { text } Example 2: latex italic \emph { accident }

Example 1: how to specify how many decimal to print out with std::cout # include <iostream> # include <iomanip> int main ( ) { double d = 122.345 ; std :: cout << std :: fixed << std :: setprecision ( 2 ) << d ; } //result that get print out: 122.34 Example 2: how to format decimal palces in c++ std :: cout << std :: setprecision ( 2 ) << std :: fixed ; // where the 2 is how many decimal places you want // note you need to <iomanip>

Answer : The first bitmap is not garbage collected when you decode the second one. Garbage Collector will do it later whenever it decides. If you want to free memory ASAP you should call recycle() just before decoding the second bitmap. If you want to load really big image you should resample it. Here's an example: Strange out of memory issue while loading an image to a Bitmap object. I think the problem is this: On pre-Honeycomb versions of Android, the actual raw bitmap data is not stored in VM memory but in native memory instead. This native memory is freed when the corresponding java Bitmap object is GC'd. However , when you run out of native memory, the dalvik GC isn't triggered, so it is possible that your app uses very little of the java memory, so the dalvik GC is never invoked, yet it uses tons of native memory for bitmaps which eventually causes an OOM error. At least that's my guess. Thankfully in Honeycomb and later, all bitmap data is stored in...

Answer : The command ansible localhost -m setup basically says "run the setup module against localhost", and the setup module gathers the facts that you see in the output. When you run the echo command these facts don't exist since the setup module wasn't run. A better method to testing things like this would be to use ansible-playbook to run a playbook that looks something like this: - hosts: localhost tasks: - debug: var=ansible_date_time - debug: msg="the current date is {{ ansible_date_time.date }}" Because this runs as a playbook facts for localhost are gathered before the tasks are run. The output of the above playbook will be something like this: PLAY [localhost] ************************************************** GATHERING FACTS *************************************************************** ok: [localhost] TASK: [debug var=ansible_date_time] ******************************************* ok: [localhost] => { "a...

Example 1: set precision in c++ // setprecision example # include <iostream> // std::cout, std::fixed # include <iomanip> // std::setprecision int main ( ) { double f = 3.14159 ; std :: cout << std :: setprecision ( 5 ) << f << '\n' ; std :: cout << std :: setprecision ( 9 ) << f << '\n' ; std :: cout << std :: fixed ; std :: cout << std :: setprecision ( 5 ) << f << '\n' ; std :: cout << std :: setprecision ( 9 ) << f << '\n' ; return 0 ; } Example 2: set precision with fixed c++ int x = 109887 ; cout << fixed << setprecision ( 3 ) << x ;

Answer : i solved my problem. What happened is that our components and other resources are all imported in app.module.ts . Because of this, the page loads all the resources every time the page loads. My solution was to apply Lazy Loading to load only those resources that are specific to the routes that i am accessing and it did fix up the loading issue. You have this problem is because your dev PC have not enough memory to handle the build as nodejs is consuming a lot of memory when you run expensive npm tasks. And the bigger your project the more memory is required to complete the task. The problem can get even worse if you want to run ng serve + ng t + ng whatewer at the same time. Check the Task manager -> Perfomrmance tab then run ng serve and you will see what I am talking about. I had struggled by the same problem until I put another 8gb RAM in my dev PC. So yes it is normal.