The actual meaning of MVVM is: UI is not Data. Data is Data, UI is UI. This means that you should not develop the application in a way that the program logic (often called business logic) is tightly coupled or dependent on the state of UI components, but instead make it dependent on the state … Read more
The only way to call a non-static method from a static method is to have an instance of the class containing the non-static method. By definition, a non-static method is one that is called ON an instance of some class, whereas a static method belongs to the class itself.
This thread mentions: If you don’t remember the empty tree sha1, you can always derive it with: git hash-object -t tree /dev/null Or, as Ciro Santilli proposes in the comments: printf ” | git hash-object –stdin -t tree Or, as seen here, from Colin Schimmelfing: git hash-object -t tree –stdin < /dev/null So I guess … Read more
Python has a keyboard module with many features. Install it, perhaps with this command: pip3 install keyboard Then use it in code like: import keyboard # using module keyboard while True: # making a loop try: # used try so that if user pressed other than the given key error will not be shown if … Read more
If you use the underscore prefix for your ivars (which is nothing more than a common convention, but a useful one), then you need to do 1 extra thing so the auto-generated accessor (for the property) knows which ivar to use. Specifically, in your implementation file, your synthesize should look like this: @synthesize missionName = … Read more
You need to instantiate a class instance here. Use p = Pump() p.getPumps() Small example – >>> class TestClass: def __init__(self): print(“in init”) def testFunc(self): print(“in Test Func”) >>> testInstance = TestClass() in init >>> testInstance.testFunc() in Test Func
This is the complex (curly) syntax for string interpolation. From the manual: Complex (curly) syntax This isn’t called complex because the syntax is complex, but because it allows for the use of complex expressions. Any scalar variable, array element or object property with a string representation can be included via this syntax. Simply write the … Read more
Check the complete and naturalWidth properties, in that order. https://stereochro.me/ideas/detecting-broken-images-js function IsImageOk(img) { // During the onload event, IE correctly identifies any images that // weren’t downloaded as not complete. Others should too. Gecko-based // browsers act like NS4 in that they report this incorrectly. if (!img.complete) { return false; } // However, they do … Read more
For VSCode users Ctrl+Shift+P or View->Command Palette. Type >Convert Indentation to Spaces press Enter.
Since Java 1.5, String.format() can be used to left/right pad a given string. public static String padRight(String s, int n) { return String.format(“%-” + n + “s”, s); } public static String padLeft(String s, int n) { return String.format(“%” + n + “s”, s); } … public static void main(String args[]) throws Exception { System.out.println(padRight(“Howto”, … Read more