| ;; Inspired by George Jahad's version: http://georgejahad.com/clojure/debug-repl.html | |
| (defmacro local-bindings | |
| "Produces a map of the names of local bindings to their values." | |
| [] | |
| (let [symbols (map key @clojure.lang.Compiler/LOCAL_ENV)] | |
| (zipmap (map (fn [sym] `(quote ~sym)) symbols) symbols))) | |
| (declare *locals*) | |
| (defn eval-with-locals |
| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
| // Word Wrapping | |
| @mixin word-wrap() { | |
| -ms-word-break: break-all; | |
| word-break: break-all; | |
| word-break: break-word; | |
| -webkit-hyphens: auto; | |
| -moz-hyphens: auto; | |
| hyphens: auto; | |
| } | |
| .word-wrap { |
| iTerm2 emacs 24.2.1 -nw with paredit on OS X 10.8 Norwegian layout | |
| Left Command is my Meta. | |
| Left Alt used for inputting special characters. | |
| Caps Lock is mapped to Control. | |
| > System Preferences > Keyboard > Keyboard > Special: Caps Lock: ^ Control | |
| iTerm > Preferences > Keys: Left Command key mapped to Right Option | |
| iTerm > Preferences > Profiles > Keys: Right option acts as: +Esc |
| ;; REPL ONLY | |
| ;; Require clj-http https://github.com/dakrone/clj-http/ | |
| (require '[clj-http.client :as client]) | |
| ;; Import Apache Common's Base64 encoder/decoder | |
| (import (org.apache.commons.codec.binary Base64)) | |
| (def test-file | |
| ;Image Credit Metropolitan Museum of Art | |
| (client/get "http://images.metmuseum.org/CRDImages/ma/web-large/DP241865.jpg" {:as :byte-array})) |
When hosting our web applications, we often have one public IP
address (i.e., an IP address visible to the outside world)
using which we want to host multiple web apps. For example, one
may wants to host three different web apps respectively for
example1.com, example2.com, and example1.com/images on
the same machine using a single IP address.
How can we do that? Well, the good news is Internet browsers
(by @andrestaltz)
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.
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.
| (require '[clojure.core.async :as a]) | |
| (def xform (comp (map inc) | |
| (filter even?) | |
| (dedupe) | |
| (flatmap range) | |
| (partition-all 3) | |
| (partition-by #(< (apply + %) 7)) | |
| (flatmap flatten) | |
| (random-sample 1.0) |
