hilfritz

#PYTHON FILTER String LIST VIA LAMBDA
list = ["Main.py", "util.py", "Test.py", "Main.java", "Util.java", "Test.java"]

#GET ALL FILES ENDING WITH .py
allpythonfiles = filter(lambda x: x.endswith(".py"), allfiles)

#GET ALL FILES ENDING WITH .java
allpythonfiles = filter(lambda x: x.endswith(".java"), allfiles)

hilfritz

find . -name "*textToSearch*" -print
find . -iname "*textToSearch*" -print  (case insensitive)
--recursive search for a file in directory that contains 'textToSearch' in file name
find . -maxdepth 1 -name "*textToSearch*" -print
-- -maxdepth 1 - means search only in current directory, not subdirectories
-- https://stackoverflow.com/questions/11328988/find-all-files-with-name-containing-string


find libdir -name "*.jar" -exec zipgrep "TEXTTOFINDINSIDEJAR" '{}' \;
find . -name "*.jar" -exec zipgrep "TEXTTOFINDINSIDEJAR" '{}' \;

hilfritz

Loading image with updates
- takes more process/memory than regular image loading in flutter
- advantage: sure that the image is updated properly 
1. load image from /data/picture1.jpg (1001 bytes)
2. replace image but retain same name /data/picture1.png (850 bytes)
* normal loading will not update the image, using the below code the change in image gets reflected
  ClipRRect(
            borderRadius: BorderRadius.circular(16.0),
            child: Image.memory(
                Uint8List.fromList(

hilfritz

/*
* Prints the items in the list with delay
*/
StreamSubscription<String> timerSubscription;
    List<String> iterable = ["2", "1", "x"];
    timerSubscription = Observable.fromIterable(timerText).concatMap((i) {
      return new Observable.timer(i, Duration(seconds: 1));
    }).listen((x) {
      print(x); //Prints "2" , 1 sec later then prints "1", 1 sec later prints "x"
      if (x == iterable[0]) {

hilfritz

import android.content.Context
import android.graphics.drawable.Drawable
import android.graphics.drawable.ShapeDrawable
import android.graphics.drawable.shapes.RectShape
import android.support.v4.content.ContextCompat
import android.support.v4.widget.NestedScrollView
import android.text.method.ScrollingMovementMethod
import android.view.Gravity

hilfritz

//source: https://github.com/ReactiveX/RxJava/issues/3505

####Emit each item 5 seconds after the previous item:
List<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5, 6));
Observable
  .interval(5, TimeUnit.SECONDS)
  .map(i -> list.get(i.intValue()))
  .take(list.size())
  .toBlocking()
  .subscribe(System.out::println)

hilfritz

DialogFragmentClass{
    @Override
    public void onStart() {
        super.onStart();
        int width = (int)(getResources().getDisplayMetrics().widthPixels*0.95);
        int height = (int)(getResources().getDisplayMetrics().heightPixels*0.30);
        getDialog().getWindow().setLayout(width, ViewGroup.LayoutParams.WRAP_CONTENT);
        //THIS WILL MAKE WIDTH 90% OF SCREEN 
        //HEIGHT WILL BE WRAP_CONTENT
        //getDialog().getWindow().setLayout(width, height);

hilfritz

import android.view.View;

/**
 * inspired and credits
 * @see http://stackoverflow.com/questions/16534369/avoid-button-multiple-rapid-clicks
 * A Debounced OnClickListener
 * Rejects clicks that are too close together in time.
 * This class is safe to use as an OnClickListener for multiple views, and will debounce each one separately.
 * This class allows a single click and prevents multiple clicks on
 * the same button in rapid succession. Setting unclickable is not enough

hilfritz

//see https://stackoverflow.com/questions/37067271/android-graphics-drawing-same-size-circles
        float devicePixelsWidth = fragment.getResources().getDisplayMetrics().widthPixels;
        float deviceActualDpi = fragment.getResources().getDisplayMetrics().xdpi ;
        float deviceActualInchWidth = devicePixelsWidth / deviceActualDpi ;
        float deviceActualCMWidth = deviceActualInchWidth * 2.54f ;
        float PixelsForActual3CM = devicePixelsWidth / deviceActualCMWidth * 3;
        float radius = (float) (devicePixelsWidth / deviceActualCMWidth * 0.05);

hilfritz

//----------------------------------SHORTCUTS----------------------
AUTORESIZE LABEL ACCORDING TO TEXT
 - SELECT LABEL + press CMD + '='

STRING CONCAT
        //let passwordInput = "HI THERE"
        //let usernameInput = "HELLO THERE
        let passwordInput:String = passwordField.text ?? ""
        let usernameInput:String = userNameField.text ?? ""
        let age = 19