Jonathan Yee jonathanyee

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

Clarify and agree on the scope of the system

User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?

Use wget to mirror a single page and its visible dependencies (images, styles)

Graphic via State of Florida CFO Vendor Payment Search (flair.myfloridacfo.com)

This is a quick command I use to snapshot webpages that have a fun image I want to keep for my own collection of WTFViz. Why not just right-click and save the image? Oftentimes, the webpage in which the image is embedded contains necessary context, such as captions and links to important documentation just incase you forget what exactly that fun graphic was trying to explain.

You can use this class to realize a simple sectioned RecyclerView.Adapter without changing your code.

The RecyclerView should use a LinearLayoutManager. You can use this code also with the TwoWayView with the ListLayoutManager (https://github.com/lucasr/twoway-view)

This is a porting of the class SimpleSectionedListAdapter provided by Google

Example:

	<!-- flat style used on dialogs -->
	<Button
	android:id="@+id/my_flat_button"
	android:layout_width="wrap_content"
	android:layout_height="match_parent"
	android:text="@string/flat"
	android:textAppearance="@style/TextAppearance.AppCompat.Button"
	android:textColor="@color/app_body_text"
	style="?borderlessButtonStyle" />

	protocol ScopeFunc {}
	extension ScopeFunc {
	@inline(__always) func apply(block: (Self) -> ()) -> Self {
	block(self)
	return self
	}
	@inline(__always) func letIt<R>(block: (Self) -> R) -> R {
	return block(self)
	}
	}

	// get a complementary color to this color:
	func getComplementaryForColor(color: UIColor) -> UIColor {

	let ciColor = CIColor(color: color)

	// get the current values and make the difference from white:
	let compRed: CGFloat = 1.0 - ciColor.red
	let compGreen: CGFloat = 1.0 - ciColor.green
	let compBlue: CGFloat = 1.0 - ciColor.blue

	using System;

	// Determine whether a circular array of relative indices is composed
	// of a single complete cycle
	// ToDO - Do it O(1) space

	namespace SingleCompleteCycle
	{
	public class Program
	{

	from csv import DictWriter
	from glob import glob
	from ofxparse import OfxParser

	DATE_FORMAT = "%m/%d/%Y"

	def write_csv(statement, out_file):
	print "Writing: " + out_file
	fields = ['date', 'payee', 'debit', 'credit', 'balance']
	with open(out_file, 'w') as f:

	Bitmap batmapBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.batman);
	RoundedBitmapDrawable circularBitmapDrawable = RoundedBitmapDrawableFactory.create(getResources(), batmapBitmap);

	// option 1 h/t [Chris Banes](https://chris.banes.me/)
	circularBitmapDrawable.setCornerRadius(batmapBitmap.getWidth());

	// option 2 h/t @csorgod in the comments
	circularBitmapDrawable.setCircular(true);