favila

(ns murmur3
 "Implementation of clojure.lang.Murmur3 in clojurescript (assuming javascript numerics).
  by Francis Avila 2014-02-24")

(def imul
  "32-bit signed integer multiply with overflow; alias of js/Math.imul.
  Does not follow unchecked-multiply-int semantics! Only two args accepted; if
  args are missing returns 0."
  (if (exists? (aget js/Math "imul"))
    (aget js/Math "imul")

ptaoussanis

;;
;; LATEST UPDATE: 25 July 2015
;;
;; ****************************************************************
;; ** NB false alarm! My original benchmarks showing large perf  **
;; ** improvements with tuples turned out to be noise,           **
;; ** unfortunately. Current (+more reliable) numbers seem[1] to **
;; ** show no consistent significant advantage using currently   **
;; ** available tuple implementations against real-world code.   **
;; **                                                            **

ptaoussanis

(defn oget
  "Like `aget` for JS objects, Ref. https://goo.gl/eze8hY. Unlike `aget`,
  returns nil for missing keys instead of throwing."
  ([o k] (when o (gobj/get o k nil)))
  ([o k1 k2] (when-let [o (oget o k1)] (gobj/get o k2 nil))) ; Optimized common case
  ([o k1 k2 & ks] (when-let [o (oget o k1 k2)] (apply oget o ks)))) ; Can also lean on optimized 2-case

ptaoussanis

(def ^:private gc-sm-cache!                                                                                                                                                          
  "Maintains maximum cache size by intelligently pruning less valuable items."
  (let [gc-running? (atom false)]                                                                                                                                                 
    (fn [cache ttl max-items now]                                                                                                                                                  
      (when-not @gc-running?                                                                                                                                                      
        (reset! gc-running? true)                                                                                                                                                 
        (let [snapshot @cache                 

richhickey

(defmacro test->
  "Takes an expression and a set of test/form pairs. Threads expr (via ->)
  through each form for which the corresponding test expression (not threaded) is true."
  [expr
  & clauses]
  (assert (even? (count clauses)))
  (let [g (gensym)
        pstep (fn [[test step]] `(if ~test (-> ~g ~step) ~g))]
    `(let [~g ~expr
           ~@(interleave (repeat g) (map pstep (partition 2 clauses)))]

franks42

(ns cljs-uuidv4
  "Generator for a v4/random UUID that works with cljs.core/UUID"
  (:require [goog.string.StringBuffer]))


(defn UUIDv4
  "Returns a new randomly generated (version 4) cljs.core/UUID,
  like: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
  as per http://www.ietf.org/rfc/rfc4122.txt.
  Usage:

ptaoussanis

(defmacro declare-remote
  "Declares the given ns-qualified names, preserving symbol metadata. Useful for
  circular dependencies."
  [& names]
    `(do ~@(map (fn [n]
                  (let [ns (namespace n)
                        v  (name n)
                        m  (meta n)]
                    `(do (in-ns  '~(symbol ns))
                         (declare ~(with-meta (symbol v) m))))) names)

ptaoussanis

(defmacro iff [test & {:keys [then else]}] `(if ~test ~then ~else))
(comment (iff false
              :then (println "true")
              :else (println "false")))

(defmacro iff-let [bindings & {:keys [then else]}] `(if-let ~bindings ~then ~else))
(comment (iff-let [x true] :else "false" :then x))

(defmacro if-lets
  "Like `if-let` but binds multiple values iff all tests are true."

tralamazza

#!/bin/bash

rediscli=`which redis-cli`
s3cmd=`which s3cmd`

lsave=`$rediscli lastsave`
echo "LASTSAVE $lsave"
saved="`$rediscli config get dir | xargs | cut -d ' ' -f 2`/`$rediscli config get dbfilename | xargs | cut -d ' ' -f 2`"
$rediscli bgsave
while [ $lsave -eq `$rediscli lastsave` ]; do

Chouser

(ns n01se.externs-for-cljs
  (:require [clojure.java.io :as io]
            [cljs.compiler :as comp]
            [cljs.analyzer :as ana]))

(defn read-file [file]
  (let [eof (Object.)]
    (with-open [stream (clojure.lang.LineNumberingPushbackReader. (io/reader file))]
      (vec (take-while #(not= % eof)
                       (repeatedly #(read stream false eof)))))))