Jon Warbrick, July 2014, V3.2 (for Ansible 1.7)
First one found from of
package controllers | |
import java.nio.charset.StandardCharsets | |
import javax.crypto.Mac | |
import javax.crypto.spec.SecretKeySpec | |
import models.RegisterFacebook | |
import org.apache.commons.codec.binary.Hex | |
import play.api.Logger | |
import play.api.libs.concurrent.Execution.Implicits.defaultContext |
Jon Warbrick, July 2014, V3.2 (for Ansible 1.7)
First one found from of
# The following two commands remove any previously installed H2O packages for R. | |
if ("package:h2o" %in% search()) { detach("package:h2o", unload=TRUE) } | |
if ("h2o" %in% rownames(installed.packages())) { remove.packages("h2o") } | |
# Next, we download packages that H2O depends on. | |
if (! ("methods" %in% rownames(installed.packages()))) { install.packages("methods") } | |
if (! ("statmod" %in% rownames(installed.packages()))) { install.packages("statmod") } | |
if (! ("stats" %in% rownames(installed.packages()))) { install.packages("stats") } | |
if (! ("graphics" %in% rownames(installed.packages()))) { install.packages("graphics") } | |
if (! ("RCurl" %in% rownames(installed.packages()))) { install.packages("RCurl") } |
A primer/refresher on the category theory concepts that most commonly crop up in conversations about Scala or FP. (Because it's embarassing when I forget this stuff!)
I'll be assuming Scalaz imports in code samples, and some of the code may be pseudo-Scala.
A functor is something that supports map
.
/* | |
For any 1<k<=64, let mask=(1<<k)-1. hash_64() is a bijection on [0,1<<k), which means | |
hash_64(x, mask)==hash_64(y, mask) if and only if x==y. hash_64i() is the inversion of | |
hash_64(): hash_64i(hash_64(x, mask), mask) == hash_64(hash_64i(x, mask), mask) == x. | |
*/ | |
// Thomas Wang's integer hash functions. See <https://gist.github.com/lh3/59882d6b96166dfc3d8d> for a snapshot. | |
uint64_t hash_64(uint64_t key, uint64_t mask) | |
{ | |
key = (~key + (key << 21)) & mask; // key = (key << 21) - key - 1; |
MIT License | |
Copyright (c) 2014 Piotr Kuczynski | |
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWAR |
Why Should I Care (For Developers)
"Dockerが面白いのはシンプルな環境に隔離性と再現性をもたらしてくれることだ.ランタイムの環境を一度作れば、パッケージにして別のマシンでも再利用することできる.さらに,すべてはホスト内の隔離された環境で行われる(VMのように).最も素晴らしい点は,シンプルかつ高速であることだ."