Why Should I Care (For Developers)
"Docker interests me because it allows simple environment isolation and repeatability. I can create a run-time environment once, package it up, then run it again on any other machine. Furthermore, everything that runs in that environment is isolated from the underlying host (much like a virtual machine). And best of all, everything is fast and simple."
The default Go implementation of
sync.RWMutex does not scale well
to multiple cores, as all readers contend on the same memory location
when they all try to atomically increment it. This gist explores an
n-way RWMutex, also known as a "big reader" lock, which gives each
CPU core its own RWMutex. Readers take only a read lock local to their
core, whereas writers must take all locks in order.
A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."
ngClass 指令允许我们基于表达式的结果为指定 DOM 对象添加／删除 CSS class
例如，若 expression 为 true，为元素添加 class="class-a"：
<div ng-class="{ class-a: expression }"></div>同时，多个 class 可以分别基于多个表达式的结果：
| include $(GOROOT)/src/Make.inc | |
| GOFMT=gofmt -spaces=true -tabindent=false -tabwidth=4 | |
| all: | |
| $(GC) jsontest.go | |
| $(LD) -o jsontest.out jsontest.$O | |
| format: | |
| $(GOFMT) -w jsontest.go |
| # Mac OS X Lion introduced a new, iOS-like context menu when you press and hold a key | |
| # that enables you to choose a character from a menu of options. If you are on Lion | |
| # try it by pressing and holding down 'e' in any app that uses the default NSTextField | |
| # for input. | |
| # | |
| # It's a nice feature and continues the blending of Mac OS X and iOS features. However, | |
| # it's a nightmare to deal with in Sublime Text if you're running Vintage (Vim) mode, | |
| # as it means you cannot press and hold h/j/k/l to move through your file. You have | |
| # to repeatedly press the keys to navigate. |
| $KCODE = 'u' | |
| # Goal: 小写金额转换为大写金额 | |
| # Limit: 金额整数位支持到亿位，小数点后支持两位并且不支持四舍五入 | |
| class ChineseFee | |
| attr_reader :chn_numbers, :chn_units, :chn_decimals | |
| def initialize | |
| @chn_numbers = %w(零 壹 贰 叁 肆 伍 陆 柒 捌 玖) | |
| @chn_units = %w(元 拾 佰 仟 万 拾万 佰万 仟万 亿) |
| # These commands will help you setup the Rails test environment without problems | |
| # | |
| # MAKE SURE YOU HAVE VIRTUAL BOX INSTALLED http://www.virtualbox.org/wiki/Downloads | |
| # | |
| # Copy paste all of following commands in your normal terminal and the following things will happen: | |
| # - rails_test_box dir is created | |
| # - rails master branch is checkout in the dir rails | |
| # - A Gemfile is created and all the gems to run the virtualbox are installed using bundler | |
| # - The rails vagrant box is downloaded and added to your vagrant boxes | |
| # - A Vagrantfile is created for vagrant |
| # These commands will help you setup the Rails test environment without problems | |
| # | |
| # MAKE SURE YOU HAVE VIRTUAL BOX INSTALLED http://www.virtualbox.org/wiki/Downloads | |
| # | |
| # Copy paste all of following commands in your normal terminal and the following things will happen: | |
| # - rails_test_box dir is created | |
| # - rails master branch is checkout in the dir rails | |
| # - A Gemfile is created and all the gems to run the virtualbox are installed using bundler | |
| # - The rails vagrant box is downloaded and added to your vagrant boxes | |
| # - A Vagrantfile is created for vagrant |
| # Video: http://rubyhoedown2008.confreaks.com/08-chris-wanstrath-keynote.html | |
| Hi everyone, I'm Chris Wanstrath. | |
| When Jeremy asked me to come talk, I said yes. Hell yes. Immediately. But | |
| then I took a few moments and thought, Wait, why? Why me? What am I supposed | |
| to say that's interesting? Something about Ruby, perhaps. Maybe the | |
| future of it. The future of something, at least. That sounds | |
| keynote-y. | |