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Chris Jeong crowjdh

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View on_the_fly_layout.json
"type": "menu_section_1",
"elements": [
"image": "",
"background": "#ffffff",
"text": "대학공지",
"action": "some-app-action-id"
crowjdh /
Last active Jul 15, 2020
How to setup Unity as a Library(for iOS/Android) with Vuforia

$ sudo tmutil listbackups
$ sudo tmutil uniquesize "/Volumes/Time Machine/Backups.backupdb/YOUR_MACHINE_NAME/BACKUP_NAME"
$ sudo tmutil calculatedrift "/Volumes/Time Machine/Backups.backupdb/YOUR_MACHINE_NAME/"

crowjdh / THINGS_I'
Last active Jan 15, 2020
This may contain numerous errors. DO NOT treat this article as a reliable source of learning.



  • Blockchain
    • What it is: Hash-based growing list of blocks, commonly implemented using merkle-tree
    • Why: Data integrity, no double-spending, no central point of failure
    • How: Using public-private cryptography. Using public key as an identity of asset owner and private key as a proof of ownership(right to do action on the asset)
  • EVM
    • Public blockchain-based distributed computing platform using smart contract.
  • Solidity and smart contract
View Enable eth for Centos 7
# Check connection status
$ nmcli d
# Edit network setting via tui
$ nmtui
# Restart network service
$ service network restart
crowjdh /
Created Oct 27, 2019
Things to try when IstanbulJS is not working(zero coverage)

Things to try when it's not working(npm run coverage):

  • Try removing node_modules and .nyc_output directory and run npm install
  • Use different version of binaries
    • NodeJS version: v12.13.0
    • NPM version: 6.12.0
    • NPX version: 6.12.0
  • Add --exit option to MochaJS
  • Add cache option to .nycrc file
$ ffmpeg -i input.h264 -c:v libx264 -c:a copy output.mp4


# sqlplus
sqlplus: error while loading shared libraries: cannot open shared object file: No such file or directory



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