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@romannurik
romannurik / AndroidCreateGhostIcon.java
Created June 14, 2013 06:28
Android ColorMatrixColorFilter example: Creates a 'ghost' bitmap version of the given source drawable (ideally a BitmapDrawable). In the ghost bitmap, the RGB values take on the values from the 'color' argument, while the alpha values are derived from the source's grayscaled RGB values. The effect is that you can see through darker parts of the …
/**
* Creates a 'ghost' bitmap version of the given source drawable (ideally a BitmapDrawable).
* In the ghost bitmap, the RGB values take on the values from the 'color' argument, while
* the alpha values are derived from the source's grayscaled RGB values. The effect is that
* you can see through darker parts of the source bitmap, while lighter parts show up as
* the given color. The 'invert' argument inverts the computation of alpha values, and looks
* best when the given color is a dark.
*/
private Bitmap createGhostIcon(Drawable src, int color, boolean invert) {
int width = src.getIntrinsicWidth();
@JakeWharton
JakeWharton / OkHttpStack.java
Created May 21, 2013 01:14
A `HttpStack` implementation for Volley that uses OkHttp as its transport.
import com.android.volley.toolbox.HurlStack;
import com.squareup.okhttp.OkHttpClient;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* An {@link com.android.volley.toolbox.HttpStack HttpStack} implementation which
* uses OkHttp as its transport.
*/
@romannurik
romannurik / SwipeDismissListViewTouchListener.java
Last active August 5, 2025 08:10
**BETA** Android 4.0-style "Swipe to Dismiss" sample code
Moved to
https://github.com/romannurik/android-swipetodismiss
@jboner
jboner / latency.txt
Last active August 4, 2025 19:20
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@leemeichin
leemeichin / README.md
Created April 12, 2012 12:02
Modulo Liquid filter for Jekyll

Modulo Liquid filter for Jekyll

Got nested columns in your grid-based Jekyll site?

Wondered why you didn't have a way to calculate the modulo inside your posts loop to open and close your 'rows' containing those nested columns?

Add this filter to your _plugins directory, and use it like so:

{{ x | mod:y }}
@mranney
mranney / emoji_sad.txt
Created January 30, 2012 23:05
Why we can't process Emoji anymore
From: Chris DeSalvo <[email protected]>
Subject: Why we can't process Emoji anymore
Date: Thu, 12 Jan 2012 18:49:20 -0800
Message-Id: <[email protected]>
--Apple-Mail=_6DEAA046-886A-4A03-8508-6FD077D18F8B
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=utf-8