wbchn

from datetime import datetime, timedelta
from pytz import timezone
import pytz

utc = pytz.utc

# 如果有冬令时、夏令时切换，下面两个时间的时区偏移不相同（仅针对美国来说，其他地区酌情调整）
utc_dt = datetime(2017, 3, 23, 0, 0, 0, tzinfo=utc)
utc_dt2 = datetime(2017, 1, 1, 0, 0, 0, tzinfo=utc)
fmt = '%Y-%m-%d %H:%M:%S %Z%z'

wbchn

/*
  https://aws.amazon.com/blogs/aws/amazon-elasticsearch-service-support-for-es-5-1/
*/
var AWS = require('aws-sdk');
var path = require('path');

//Object for all the ElasticSearch Domain Info
var esDomain = {
    region: process.env.RegionForES,
    endpoint: process.env.EndpointForES,

wbchn

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

wbchn

# using D1 mini for example:

## Firmware
'''
esptool.py --port /dev/ttyUSB0 erase_flash
make PORT=/dev/ttyUSB0 FLASH_MODE=dio FLASH_SIZE=32m deploy

minicom -D /dev/ttyUSB0 -b 115200
'''

wbchn

Install pidgin from source

$ sudo apt-get install build-essential intltool
$ sudo wget http://sourceforge.net/projects/pidgin/files/Pidgin/2.10.12/pidgin-2.10.12.tar.bz2
$ sudo tar -xjvf pidgin-2.10.12.tar.bz2
$ cd pidgin-2.10.12
$ sudo ./configure

# configure: error: GLib 2.16.0, run below command #
$ sudo apt-get build-dep pidgin

wbchn

/* define constants */
#define FOSC 11059000L              // 11.059 MHz

// #define T1MS (65536-FOSC/1000)      //1ms timer calculation method in 1T mode
#define T1MS_H    0xD4
#define T1MS_L    0xCC

/* define variables */
WORD count = 1000;                         //1000 times counter

wbchn

Notebook.1

Zeppelin: add dep

eg: add csv package,

%dep
z.reset()
z.addRepo("Spark Packages Repo").url("http://dl.bintray.com/spark-packages/maven")
z.load("com.databricks:spark-csv_2.11:1.4.0")

wbchn

web framework

Base on Timer

import time
from threading import Timer

def on_time_handler(order_id=None, notify_url=None):
    """
    https://docs.python.org/2/library/threading.html#threading.Timer
 """

wbchn

批量修改git commit 记录。

git filter-branch --commit-filter '
    if [ "$GIT_AUTHOR_EMAIL" = "[email protected]" ];
    then
            GIT_AUTHOR_NAME="wb.chn";
            GIT_AUTHOR_EMAIL="[email protected]";
 git commit-tree "$@";