allenyang79

defmodule MyMod do
    defstruct ~w|foo bar|a

    def hello(v) do
        case v do
            %{foo: _foo} = v -> IO.puts(_foo)
            _ -> :oops
        end
    end
end

allenyang79

import time
import gevent
import gevent.monkey
from flask import Flask, copy_current_request_context, g, request, _request_ctx_stack
import logging

gevent.monkey.patch_all()

logging.basicConfig(level=0)  # logging.DEBUG)
logger = logging.getLogger()

allenyang79

"""Partice to custom string inherit python str
"""

class ErrorMsg(str):
    def __new__(cls, *args, **kw):
        if len(args) > 0:
            message = args[0]
        else:
            message = kw.get('message')
        return str.__new__(cls, message)

allenyang79

defmodule Foo do
  def foo(a,b) do
    with {:ok, dob} <- a,
      {:ok, name} <- b
    do
      %{dob: dob, name: name}
    else
      # nil -> {:error, ...} an example that we can match here too
      # err -> err
      _ -> :err

allenyang79

import mock
import gevent
import random
def do_job(name='noname', sleep=10):
    print "begin...%s" % sleep
    for i in range(sleep):
        gevent.sleep(i)
        print "sleep...%s" % i
        if random.randint(0, 3) == 0:
            print "oops"

allenyang79

ExUnit.start

defmodule Test do
  use ExUnit.Case

  @moduledoc """
  Run with test

  ## Examples

allenyang79

Elixir的macro ＆ use

可以用defmacro __using__來給之用use的modue，module自動產生預設的method

或者新增新的keyword, 雖然非必要不建議新增太多自定的macro elixir的if else或者ExUnit都有用到

allenyang79

# abc(?=def) 比對時，會把'def'算進去，但比對結果不會把(?=def）裡的字元組進去，比對出的位置是abc
# abc(:=def) 會比對adcdef,但在match的結果，並不會有def
# abc(?!def) 比對出abc但後面不是def

>>> pattern = r"abc"
>>> re.search(pattern, 'xyzabcdefxyz').group(0)
'abc'
>>>
>>> pattern = r"abc(?=def)"
>>> m = re.search(pattern, 'xyzabcdefxyz').group(0)

allenyang79

(
  cd "$NVM_DIR"
  git fetch origin
  git checkout `git describe --abbrev=0 --tags --match "v[0-9]*" origin`
) && . "$NVM_DIR/nvm.sh"

allenyang79

"""
Custom Flask and Requset.
overwrite Request.on_json_loading_failed and raise a custom exception.
"""


class CustomRequest(Request):
    def on_json_loading_failed(self, e):
		"""
        ref: https://tedboy.github.io/flask/_modules/flask/wrappers.html#Request.on_json_loading_failed