| merge_vars <- function(.data, to, from) | |
| { | |
| to = deparse(substitute(to)) | |
| from_vars = substitute(from) | |
| from_var_pos <- setNames(as.list(seq_along(.data)), names(.data)) | |
| pos <- eval(from_vars, from_var_pos) | |
| y <- .data[[to]] | |
| # 如果不是NA就填回前面變數 |
If you were to give recommendations to your "little brother/sister" on things that they need to do to become a data scientist, what would those things be?
I think the "Data Science Venn Diagram" (http://drewconway.com/zia/2013/3/26/the-data-science-venn-diagram) is a great place to start. You need three things to be a good data scientist:
| library("shiny") | |
| x <- runApp(shinyApp( | |
| fluidPage( | |
| "Password:", | |
| tags$input(id = "password", type = "password"), | |
| actionButton("done", "Done") | |
| ), | |
| function(input, output) { | |
| observe({ |
@版本 2.0.0
譯注：此翻譯版，主要給不能流利的讀英文的人看，相關專有名詞還是保留原文。翻譯不好地方請協助pull request.
此repository包含了一些前端開發的面試問題，來審查一個有潛力的面試者。這並不是建議你對同一個面試者問上所有的問 (那會花費好幾小時)。從列表中挑幾個題目，應該就夠幫助你審查面試者是否擁有你需要的技能。
Rebecca Murphey 的 Baseline For Front-End Developers 也是一篇很棒且值得讀的文章在你開始面試之前。
| martingale <- function(max_round = 1000, init_token = 100, bid = 1, | |
| rouletee_prob = c(19/37, 18/37)) { | |
| ## max_round: number of bidding | |
| ## init_token: initial # of chip | |
| ## bid: bidding chip when winning | |
| ## rouletee_prob: c(win, lose) | |
| if (sum(rouletee_prob) != 1) stop("sum of 'rouletee_prob' must be 1") | |
| capital = init_token ## current # of chip |
| html_table.xml_node <- function(x, header = NA, trim = TRUE, | |
| fill = FALSE, dec = ".") { | |
| stopifnot(html_name(x) == "table") | |
| # Throw error if any rowspan/colspan present | |
| rows <- html_nodes(x, "tr") | |
| n <- length(rows) | |
| cells <- lapply(rows, "html_nodes", xpath = ".//td|.//th") | |
| /* Solarized Dark | |
| For use with Jekyll and Pygments | |
| http://ethanschoonover.com/solarized | |
| SOLARIZED HEX ROLE | |
| --------- -------- ------------------------------------------ | |
| base03 #002b36 background | |
| base01 #586e75 comments / secondary content |
| [ | |
| // Remapping of *some* SublimeREPL shortcuts | |
| { "keys": ["ctrl+super+s"], "command": "repl_transfer_current", "args": {"scope": "selection"}}, | |
| { "keys": ["ctrl+shift+,", "s"], "command": "repl_transfer_current", "args": {"scope": "selection", "action":"view_write"}}, | |
| { "keys": ["ctrl+shift+super+f"], "command": "repl_transfer_current", "args": {"scope": "file"}}, | |
| { "keys": ["shift+ctrl+,", "f"], "command": "repl_transfer_current", "args": {"scope": "file", "action":"view_write"}}, | |
| { "keys": ["ctrl+super+l"], "command": "repl_transfer_current", "args": {"scope": "lines"}}, | |
| { "keys": ["shift+ctrl+,", "l"], "command": "repl_transfer_current", "args": {"scope": "lines", "action":"view_write"}}, | |
| { "keys": ["ctrl+super+b"], "command": "repl_transfer_current", "args": {"scope": "block"}}, | |
| { "keys": ["shift+ctrl+,", "b"], "command": "repl_transfer_current", "args": {"scope": "block", "action":"view_write"}} |
Prereq:
apt-get install zsh
apt-get install git-coreGetting zsh to work in ubuntu is weird, since sh does not understand the source command. So, you do this to install zsh
wget https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | zsh
這篇文章旨在作為快速參考與展示。要更多完整的資訊，請見 John Gruber 原本的規格與 Github 偏好的 Markdown（Github-flavored Markdown，簡寫為GFM）資訊頁。
如果你正在找 Markdown Here 的小抄（Cheatsheet），這裡也有一篇。你也可以看看更多 Markdown 的工具。
譯註：可以參考這份中文版文件，有更詳盡的 Markdown 語法說明。