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

Python 代码规范

命名

• 尽量简单明了。

jiacai2050

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

jiacai2050

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from __future__ import unicode_literals
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from datetime import datetime
from os import path
import smtplib
import sys

jiacai2050

#!/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

jiacai2050

#!/usr/bin/env python
#-*- coding=utf-8 -*-

import requests
import re
import os
import copy

host = 'v2ex.com'
headers = {  

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,

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

(ns demo.record
  (:require [criterium.core :refer [bench with-progress-reporting]]))

(def a-z-ks (map (comp keyword str) (seq "abcdefghijklmnopqrstuwvxyz")))
(def dummy-map (zipmap a-z-ks  (range)))

(defmacro alphabet-macro []
  `(do
     (defrecord ~'Alphabet [~@(map (comp symbol str) a-z-ks)])
     (def ~'dummy-record (~'Alphabet. ~@(range 26)))))

jiacai2050

(def dataset (interleave (range 10000000) (range)))

(defn workflow [ds]
  (->> ds
       (dedupe)
       (map #(* % %))
       (filter #(= 0 (rem % 111)))
       (take 10)))