oucb

###haskell 基本类型,bool(True/False),list[],tuple(),int,Integer,Double,char'' ,string"",function(\x->x+1)

1. wiki

• packing
• API链接
• IDE:leksah
• 测试工具QuickCheck,HUnit
• 包管理工具cabal
• 手动安装包： cd file_path
runhaskell Setup configure

oucb

def get_count(q):
    count_q = q.statement.with_only_columns([func.count()]).order_by(None)
    count = q.session.execute(count_q).scalar()
    return count

q = session.query(TestModel).filter(...).order_by(...)

# Slow: SELECT COUNT(*) FROM (SELECT ... FROM TestModel WHERE ...) ...
print q.count()

oucb

import asyncio

import aiomysql
from aiomysql.cursors import DictCursor


class MysqlWrapper:
    def __init__(self, host, port, user, password, db):
        self.host = host
        self.port = port

oucb

import asyncio


async def task():
    while True:
        print('Do something.')
        await asyncio.sleep(1)


async def run(lp):

oucb

#-!-coding:utf-8-!-

# schema

# revision identifiers, used by Alembic.
revision = '507c3af35680'
down_revision = None

from alembic import op
import sqlalchemy as sa

oucb

高效的 GraphQL + Antd

本文原载于我的独立博客 https://lutaonan.com/blog/effective-graphql-and-antd/

在过去的几年，不论是面向内部的系统，还是面向外部的产品，我们都大量地使用了 Ant.Design —— 一个基于 React 的 UI 组件库。

在做内部系统时，Ant.Design 解决了几乎 60% 的问题。剩下的问题在业务逻辑和代码组织的复杂度。我见过很多内部系统因为滥用状态管理而使代码变得复杂，他们之所以使用状态管理库，并不是因为应用的状态复杂，而是因为需要一个状态树来管理网络请求的状态、接口返回的数据等等这些和接口相关的状态。

真的需要状态管理库吗？在之前，我没有信心回答这个问题。但在使用了 GraphQL (Apollo) 后，我确信，在大多数场景，你不再需要状态管理。

oucb

There's a couple of ways, one way is

• Get search results
  • Do SPC / and type in your search string
  • or SPC x S and search string - where x is your scope indicator (p for project, d for directory, etc..)
• Once you have the occurences you want, hit C-c C-e inside the helm buffer to put all your match occurences and puts them into a special buffer called the edit buffer or something like that
• in that buffer you can use any commands you'd normally use on a buffer
• the C-c C-c to commit your changes.

oucb

车子相关:
	头盔
	驼包
	货架
	补胎工具
	水杯
	内胎
	码表
	V刹皮
	强光手电筒(18650电池也要带几块备用)

oucb

[Unit]
Description=supervisord - Supervisor process control system for UNIX
Documentation=http://supervisord.org
After=network.target

[Service]
Type=forking
ExecStart=/bin/supervisord -c /etc/supervisord/supervisord.conf
ExecReload=/bin/supervisorctl reload
ExecStop=/bin/supervisorctl shutdown

oucb

Ruby and Python profilers

CPU profilers

Python

• cProfile
• https://github.com/bdarnell/plop (blog post)
• https://github.com/rkern/line_profiler
• https://github.com/uber/pyflame (blog post)