WonRhee

// Given array of integers, find its mode. (the number which appears most often in it)

function arrayMode(sequence) {
    var arr = {};
    for (var i=0; i < sequence.length; i++) {
        var num = sequence[i];
        if (arr[num] === undefined){
            arr[num] = 0;
        } 
        arr[num] += 1;

WonRhee

# rename dash to underscore using regex style
rename "s/-/_/g" *

WonRhee

# ~/.bashrc
# some more ls aliases
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'
alias ld='ls -ld -1 $PWD/*'

WonRhee

I have a web app that needs to talk to point of sale hardware: receipt printers, customer displays, 
cash drawers and payment terminals. Direct communication from the web app with these devices is 
impossible, so I created a native app that can be installed on the computer that can talk to the 
devices. The app runs a web server that exposes these devices using a REST api.

The native app registers itself upon startup with a webservice. It sends its own IP address on 
the local network and the server also sees the external IP address of the network. The web app 
sends a discovery request to the webservice and it receives all the local IP addresses which 
have the same external IP address. 

WonRhee

import sqlalchemy
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, ForeignKey
from sqlalchemy.orm import sessionmaker, relationship


engine = sqlalchemy.create_engine('sqlite:///:memory:')
Base = declarative_base()