mkim0710

solve <- function(n) {
  result <- largeSubtract(largeAdd(sumMultiple(n, 3), sumMultiple(n, 5)), sumMultiple(n, 15))
}

right <- function (string, char){
  substr(string,nchar(string)-(char-1),nchar(string))
}

left <- function (string,char){
  substr(string,1,char)

mkim0710

_contracts = {}


class Contract:
    @classmethod
    def __init_subclass__(cls):
        _contracts[cls.__name__] = cls

    def __set__(self, instance, value):
        self.check(value)

mkim0710

# see blog post here:
# http://gettinggeneticsdone.blogspot.com/2015/01/microbenchmark-package-r-compare-runtime-r-expressions.html

library(dplyr)
library(nycflights13)
flights

# base
aggregate(flights$arr_delay, by=list(flights$carrier), mean, na.rm=TRUE)

mkim0710

How to Ask for Help using R
========================================================

The key to getting good help with an R problem is to provide a minimally working 
reproducible example (MWRE). Making an MWRE is really easy with R, and it will 
help ensure that those helping you can identify the source of the error, and 
ideally submit to you back the corrected code to fix the error instead of sending
you hunting for code that works. To have an MWRE you need the following items:

- a minimal dataset that produces the error

mkim0710

# 셀레늄 패키지와 rvest 패키지를 설치합니다.
source("https://install-github.me/ropensci/RSelenium")
install.packages("rvest")
install.packages("dplyr")

# 패키지를 불러서 사용할 준비를 합니다.
library(RSelenium)
library(rvest)
library(dplyr)

mkim0710

---
title: "Effect of compression type and file complexity on saveRDS size and speed"
author: "David Robinson"
date: "April 20, 2015"
output: html_document
---

```{r echo = FALSE}
knitr::opts_chunk$set(cache = TRUE, message = FALSE)
```

mkim0710

#!/bin/sh

# onedrive-ubu.sh
# A BASH script to set up OneDrive integration with GNOME on Ubuntu
# Copyright (C) 2018 Garrett Mills ([email protected])
# This software is licensed under the MIT License.
# This sofware is provided without warranty or even any implied intent of purpose.
#
# OnedriveD: https://github.com/xybu/onedrived-dev
#

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<NotepadPlus>
    <UserLang name="Stata" ext="do ado" udlVersion="2.1">
        <Settings>
            <Global caseIgnored="yes" allowFoldOfComments="no" foldCompact="no" forcePureLC="2" decimalSeparator="0" />
            <Prefix Keywords1="no" Keywords2="no" Keywords3="no" Keywords4="no" Keywords5="no" Keywords6="no" Keywords7="yes" Keywords8="no" />
        </Settings>
        <KeywordLists>
            <Keywords name="Comments">00// 00* 00/// 01 02 03/* 04*/</Keywords>
            <Keywords name="Numbers, prefix1"></Keywords>
            <Keywords name="Numbers, prefix2"></Keywords>

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fread(sprintf("bzcat %s | tr -d '\\000'", filename))

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Installing ChromeOS on VirtualBox

1. Download the NeverWare's ChromeOS build from http://www.neverware.com/freedownload

2. Extract the *.bin.zip

3. Convert it to VDI. vboxmanage convertdd chromiumos_image.bin chromiumos_image.vdi

4. mv chromiumis_image.vdi C:\t\v\chromeos\