ixig

Superposition:
https://www.youtube.com/watch?v=7-DmVBLaydE

R-2R Ladder:
https://www.youtube.com/watch?v=VKfx7e88uYI

R/L/C Impedance:
https://www.youtube.com/watch?v=hjxJIB5kUA4

R/C Circuit & Filter:

ixig

1. Strategy Pattern
Define a family of algorithms, encapsulate each one and make them interchangeable
Lets algorithms vary independently for clients of that class

class List {
    - Sorting sortType = new DefaultSort();
    ==============================
    + setSortType(Sorting newSort) { sortType = newSort; }
    + sort() { sortType.sort(this); }
}

ixig

>>> Execute something on UI Thread from Non-UI Thread <<<
runOnUIThread(new Runnable() ...);

ixig

# Recall a bash history entry without invoking
###:p /* then press <UP> key */

# GCC - expand pre-processing only
gcc -E -o foo.i foo.c

# test if file or directory exists
[ -f filename ] && ... 		/* substitute "||" for does NOT exist */
[ -d filename ] && ...

ixig

CC=g++
CFLAGS=-c -Wall -I/usr/local/opt/openssl/include
LDFLAGS=-L/usr/local/opt/openssl/lib
LIBS=-lcrypto

EXECUTABLE1=dh_test
EXECUTABLE2=udp-send-dh

SOURCES1=dh_test.cpp dh.cpp
SOURCES2=udp-send-dh.cpp dh.cpp

ixig

# initialize new local repo
git init

# add all files in *current* directory (and below) to staging area
git add .

# commit staged changes
git commit -m "<commit_msg>"

# checkout last commit on branch 'master'

ixig

package com.gopro;

import android.os.Handler;
import android.util.Log;

import junit.framework.Assert;

interface Events {
    void onTimeout();
    void onX();

ixig

>>> Convert InputStream to String <<<

String text = new Scanner(inputStream).useDelimiter("\\A").next();

OR 

try (java.util.Scanner s = new java.util.Scanner(inputStream)) {
    return s.useDelimiter("\\A").hasNext() ? s.next() : "";
}

ixig

1. STUDIO_JDK=/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/

2. <CMD> + L.Click
  Navigate to Declaration/Definition
  
3. <OPT> + <CMD> + Left/Right
  Navigate Back/Forward
  
4. Click on Marker in Marker Bar
  Navigate to code line

ixig

java.lang.System:
  .out.format(String format, Object... args)
  .arraycopy(Object src, int srcPos, Object dest, int destPos, int length)
  .currentTimeMillis()

java.lang.String:
  .charAt(int index)
  .toCharArray()
  .toUpperCase()
  .toLowerCase()