yevgenko

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Xft.dpi:                    96
Xft.antialias:              false
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Xft.hinting:                true
Xft.hintstyle:              hintslight

hrldcpr

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

audreyt

開源之道

Original transcript: http://allisonrandal.com/2012/04/15/open-source-enlightenment/

這幾年來，我慢慢覺得，我們參與開源社群，就像是在一條道路上並肩而行：這不僅讓我們成為更好的程式設計者，也讓我們通過與人合作，而成為更好的人。

您可以將它想成一條修行之道，讓身而為人的我們能夠不斷成長。接下來，我想談談我對開源世界的個人觀點，希望能與您分享。

首先，人是一切開源專案的核心。程式碼是很重要，但最核心的永遠是人。

ckirkendall

(use '[clojure.core.match :only [match]])

(defn evaluate [env [sym x y]]
  (match [sym]
    ['Number]   x
    ['Add]      (+ (evaluate env x) (evaluate env y))
    ['Multiply] (* (evaluate env x) (evaluate env y))
    ['Variable] (env x)))
    
(def environment {"a" 3, "b" 4, "c" 5})

gist:3174213

(defvar rcirc-max-message-length 420
  "Messages longer than this value will be split.")

(defun rcirc-send-message (process target message &optional noticep silent)
  "Send TARGET associated with PROCESS a privmsg with text MESSAGE.
If NOTICEP is non-nil, send a notice instead of privmsg.
If SILENT is non-nil, do not print the message in any irc buffer."
  ;; max message length is 512 including CRLF
  (let* ((response (if noticep "NOTICE" "PRIVMSG"))
         (oversize (> (length message) rcirc-max-message-length))

audreyt

從 SocialCalc 到 EtherCalc

先前在《開源應用程式架構》 一書中，我介紹了 SocialCalc 這個在瀏覽器中運行的試算表編輯器，以取代伺服器為中心的 WikiCalc 架構。SocialCalc 在瀏覽器中執行所有的運算，只有在載入和儲存試算表時才會使用伺服器。

追求效能是 Socialtext 團隊在 2006 年時設計 SocialCalc 的主要目的。重點在於：在 JavaScript 環境下執行客戶端運算，儘管在當年的速度僅有伺服器端 Perl 運算的十分之一，但仍然勝過 AJAX 來回傳輸資料造成的網路延遲：

---

******

edalorzo

package codemasters.lambda.learn.streams;

import java.util.List;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.NoSuchElementException;
import java.util.function.Supplier;
import java.util.function.Consumer;
import java.util.function.Predicate;

ethan5422

(defun eshell-last-argument (n m)
  (let* ((input (substring-no-properties
                 (eshell-previous-input-string (1- m))))
         (parse (with-temp-buffer
                  (insert input)
                  (nth (1- n) (reverse (eshell-parse-arguments
                                        (point-min) (point-max)))))))
    (eval parse)))

(defun eshell-insert-last-word (n)

yantonov

How to install GHC from source + latest stack + cabal + cabal-install on ubuntu

for your convinience this instuction is available as:
gist
git repo

preferred way install stack than install ghc

stack (package manager and build tool, preferrered way to manage dependencies)

# settings

chambart

type zero = unit
type 'a succ = unit -> 'a
type one = zero succ

type 'a plus_1 = 'a succ
type 'a plus_2 = 'a plus_1 plus_1
type 'a plus_4 = 'a plus_2 plus_2
type 'a plus_8 = 'a plus_4 plus_4