2019百日打卡DAY6

百日Emacs

Helm is an Emacs framework for incremental completions and narrowing selections. It provides an easy-to-use API for developers wishing to build their own Helm applications in Emacs, powerful search tools and dozens of already built-in commands providing completion to almost everything. It is a must-have for anyone using Emacs as a main work environment. Helm has been widely adopted by many Emacs power-users. It is available in Melpa and can be easily installed from the Emacs package manager.

All joking aside, Emacs’s default interface isn’t very user friendly when you don’t know the shortcut or command name you want to execute. When you run a command that requires user input, you’re given an empty prompt. That’s it. If you read the tutorial then you may remember that you can press TAB to see some options. That’s a little better I suppose, but it would be better if you could see your possibilities without asking for it. Enter helm.
Helm is an extension package for Emacs that, among other things, hooks into many of the commands requiring user input and supplants them with a new command that presents the user with a prompt AND an interactive list of options that is fuzzy matched to what is typed in that prompt. It’s sort of similar to the goto anything commands that are available in Sublime Text, except it’s available on more than just a handful of commands.

说白了helm就是narrowing selection，就是方便查找的，包括command，file，buffer…

百日长难句

That legislation was designed to protect people who were victims of discrimination because they had one or other protected characteristic(religion,race,gender and so on)but it was not particularly concerned with the motivations or characteristics,including religion,of the perpetrators of discrimination.[The Economist]

1. be designed to do sth目的是做某事/旨在做某事
2. characteristic特性，特征；典型的，特色的
3. be concerned with关心
4. motivations动机
5. perpetrate犯…罪
6. legislation立法h(legitimate legal legilature合法的、法律上的、立法机关)

这项立法的目的是保护那些受歧视的受害者，因为他们身上有一个或者其他受保护的特性(如宗教，种族，性别等)，但是这些受保护的特性并不关心歧视肇事者的动机或者他们包括宗教在内的特性。