dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

devarajchidambaram

Difference between spawn and exec functions of child_process

The Node.js Child Processes module (child_process) has two functions spawn and exec, using which we can start a child process to execute other programs on the system. Those new to child_process may wonder why there are two functions to do the same thing, and which one they should use. I'll explain the differences between spawn and exec to help you decide when to use what.

The most significant difference between child_process.spawn and child_process.exec is in what they return - spawn returns a stream and exec returns a buffer.

child_process.spawn returns an object with stdout and stderr streams. You can tap on the stdout stream to read data that the child process sends back to Node. stdout being a stream has the "data", "end", and other events that streams have. spawn is best used to when you want the child process to return a large amount of data to Node - image processing, reading binary data etc.

child_process.spawn is "asynchronously asynchr

mohanpedala

Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail

bmsoko

--------- beginning of system
05-11 19:48:47.991  1641  1641 I vold    : Vold 3.0 (the awakening) firing up
05-11 19:48:47.991  1641  1641 D vold    : Detected support for: ext4 f2fs vfat
05-11 19:48:47.994  1641  1641 D vold    : Found unmanaged dm device named vendor
05-11 19:48:47.994  1641  1641 D vold    : Found unmanaged dm device named system
05-11 19:48:47.994  1641  1641 D vold    : Found unmanaged dm device named system-verity
05-11 19:48:47.994  1641  1641 W vold    : Failed to LOOP_GET_STATUS64 /dev/block/loop5: No such device or address
05-11 19:48:47.994  1641  1641 W vold    : Failed to LOOP_GET_STATUS64 /dev/block/loop3: No such device or address
05-11 19:48:47.994  1641  1641 W vold    : Failed to LOOP_GET_STATUS64 /dev/block/loop7: No such device or address
05-11 19:48:47.994  1641  1641 W vold    : Failed to LOOP_GET_STATUS64 /dev/block/loop0: No such device or address