ghoseb

;;
;; NS CHEATSHEET
;;
;; * :require makes functions available with a namespace prefix
;;  and optionally can refer functions to the current ns.
;;
;; * :import refers Java classes to the current namespace.
;;
;; * :refer-clojure affects availability of built-in (clojure.core)
;;   functions.

mislav

require 'nokogiri'

ugly = Nokogiri::HTML ARGF
tidy = Nokogiri::XSLT File.open('tidy.xsl')
nice = tidy.transform(ugly).to_html

puts nice

Ameeda

2 ways to extract elements from within XML namespaces using Nokogiri
When trying to select elemenets in the default namespace, e.g. "xmlns= http://www.w3.org/2005/Atom", try the following two ways. Note the xmlns=" attribute on entry element:

Original xml:
Nokogiri::XML(@xml_string).xpath("//author/name").each do |node|
    puts node
  end


1. Define a namespace context for your XPath expression and point your XPath steps to match elements in that namespace. Define a namespace-to-prefix mapping and use this prefix (a) in the XPath expression.

yoavram

import requests

#http://docs.python-requests.org/en/latest/user/quickstart/#post-a-multipart-encoded-file

url = "http://localhost:5000/"
fin = open('simple_table.pdf', 'rb')
files = {'file': fin}
try:
  r = requests.post(url, files=files)
	print r.text

jeppeburchardt

call "C:\Program Files\Microsoft SDKs\Windows\v7.1\bin\Setenv.cmd" /Release /x86

call "C:\Program Files\Microsoft SDKs\Windows\v7.1\bin\Setenv.cmd" /Release /x64

zilti

Sample project for the "Getting started with JavaFX in Clojure" ( https://coderwall.com/p/4yjy1a ) ProTip.

friemen

;; put this into profiles.clj in ~/.lein folder
{:user  {:jvm-opts ^:replace ["-Xmx6G"
                              "-XX:-OmitStackTraceInFastThrow"]
         :repl-options {:timeout 180000}
         :plugins [[cider/cider-nrepl "0.49.0"]
                   [refactor-nrepl "3.10.0"]
                   [jonase/eastwood "0.3.14"]
                   [lein-ancient "1.0.0-RC3"]
                   [lein-try "0.4.3"]
                   [lein-cloverage "1.0.13"]

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

john2x

Clojure Destructuring Tutorial and Cheat Sheet

(Related blog post)

Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.

Vectors and Sequences

wrobstory

;; Gaussian sum!
user=> (crit/with-progress-reporting (crit/quick-bench (/ (* (+ 1 99999) 99999) 2)))
Warming up for JIT optimisations 5000000000 ...
  compilation occured before 333366 iterations
Estimating execution count ...
Sampling ...
Final GC...
Checking GC...
WARNING: Final GC required 8.548926352381509 % of runtime
Finding outliers ...