protrolium

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

You can get the list of installed codecs with:

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

ctrl-freak

https://stackoverflow.com/a/18003462/348146

None of these suggestions worked for me, because Android was appending a sequence number to the package name to produce the final APK file name (this may vary with the version of Android OS). The following sequence of commands is what worked for me on a non-rooted device:

1. Determine the package name of the app, e.g. com.example.someapp. Skip this step if you already know the package name.

   adb shell pm list packages

   Look through the list of package names and try to find a match between the app in question and the package name. This is usually easy, but note that the package name can be completely unrelated to the app name. If you can't recognize the app from the list of package names, try finding the app in Google Play using a browser. The URL for an app in Google Play contains the package name.

CMCDragonkai

Understanding the Memory Layout of Linux Executables

Required tools for playing around with memory:

• hexdump
• objdump
• readelf
• xxd
• gcore

maiermic

Variance

The term variance describes how subtyping between higher kinded types is related to subtyping relations of their type arguments.

Higher Kinded Types

A higher kinded type composes type arguments to a new type. I use square bracket notation to define a higher kinded type:

C[T] // The higher kinded type `C` composes type argument `T` to a new type `C[T]`.

The same works with multiple type arguments:

CMCDragonkai

Regular Expression Engine Comparison Chart

Many different applications claim to support regular expressions. But what does that even mean?

Well there are lots of different regular expression engines, and they all have different feature sets and different time-space efficiencies.

The information here is just copied from: http://regular-expressions.mobi/refflavors.html

niranjv

# Python logger in AWS Lambda has a preset format. To change the format of the logging statement, 
# remove the logging handler & add a new handler with the required format

import logging
import sys

def setup_logging():
    logger = logging.getLogger()
    for h in logger.handlers:
      logger.removeHandler(h)

zmwangx

pty
pty.o

jcracknell

def urldecode:
  def unhex:
    if 48 <= . and . <= 57 then . - 48 elif 65 <= . and . <= 70 then . - 55 else . - 87 end;

  def bytes:
    def loop($i):
      if $i >= length then empty else 16 * (.[$i+1] | unhex) + (.[$i+2] | unhex), loop($i+3) end;
    [loop(0)];

  def codepoints:

martinheld

JWT Kong Example

• Get and Start Kong and Co

git clone [email protected]:Mashape/docker-kong.git
cd docker-kong/compose
docker-compose up

• Create Kong API Route