jiacai2050

Contents

• Why care about Rust?
• The Toolchain
• Creating a New Project
• Modules
• Crates
• Types
• References
• Mutability

jiacai2050

Preferences

All preferences for the DNS-over-HTTPS functionality in Firefox are located under the "network.trr" prefix (TRR == Trusted Recursive Resolver).

network.trr.mode

set which resolver mode you want.

0 - Off (default). use standard native resolving only (don't use TRR at all)

1 - Race native against TRR. Do them both in parallel and go with the one that returns a result first.

jiacai2050

;; After connecting an nrepl client repl to an nrepl server, some
;; output will still appear on stdout from the server.

;; Try these snippets - they will both produce output on the nrepl server
;; Java libraries commonly do both these things.

(.println System/out "Hello stdout.")
(.start (Thread. #(println "Hello from a new thread.")))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

jiacai2050

• defprotocol: defines an interface
• deftype: create a bare-bones object which implements a protocol
• defrecord: creates an immutable persistent map which implements a protocol

Typically you'll use defrecord (or even a basic map);
unless you need some specific Java inter-op,
where by you'll want to use deftype instead.

Note: defprotocol allows you to add new abstractions in a clean way Rather than (like OOP) having polymorphism on the class itself,

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#!/usr/bin/env python
# Reflects the requests from HTTP GET methods
# Written by Nathan Hamiel (2010), modified by Michael Goodness (2015)

from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
from argparse import ArgumentParser
from urlparse import urlparse

import daemon
import socket

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# Initialize the scroll
page = es.search(
  index = 'yourIndex',
  doc_type = 'yourType',
  scroll = '2m',
  search_type = 'scan',
  size = 1000,
  body = {
    # Your query's body
    })

jiacai2050

Use these rapid keyboard shortcuts to control the GitHub Atom text editor on Mac OSX.

Key to the Keys

• ⌘ : Command key
• ⌃ : Control key
• ⌫ : Delete key
• ← : Left arrow key
• → : Right arrow key
• ↑ : Up arrow key

jiacai2050

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

jiacai2050

Python 代码规范

Contents

• 命名

命名

• 尽量简单明了。

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import re

def mapper(emit, text):
    words = re.split('[^\w]', text.lower())
    
    for word in words:
        if word:
            emit(word, 1)

def reducer(key, values):