carlcarl

/* Exercise: Loops and Functions #43 */
package main

import (
	"fmt"
	"math"
)

func Sqrt(x float64) float64 {
	z := float64(2.)

carlcarl

產生檔案

產生 1000 個 500kb 的隨機檔案

for i in {1..100000}; do head -c 500 /dev/urandom > dummy$i; done

產生隨機內容大檔案 (1G)

carlcarl

import functools
import pymongo
import logging
import time

MAX_AUTO_RECONNECT_ATTEMPTS = 5

def graceful_auto_reconnect(mongo_op_func):
  """Gracefully handle a reconnection event."""
  @functools.wraps(mongo_op_func)

carlcarl

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Element

Box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
• elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
• elem.getClientRects(), elem.getBoundingClientRect()

carlcarl

Nginx使用者請看這

由於Let's Encrypt的安裝程式目前還沒有提供nginx模組（其實有在開發，只是還在測試階段），我們依舊可以透過安裝程式自動取得certification後，手動更新nginx的設定黨即可。

首先，我們先取得免費的憑證：

# 如果nginx正在執行中，請先把它關閉
$ sudo -s
$ service nginx stop
$ ./letsencrypt-auto certonly --email 你的email@你的email.net -d freessl.csie.io

carlcarl

#!/bin/bash
### Setup a wifi Access Point on Ubuntu 12.04 (or its derivatives).

### make sure that this script is executed from root
if [ $(whoami) != 'root' ]
then
    echo "
This script should be executed as root or with sudo:
    sudo $0
"

carlcarl

# 日本語用
$ sudo apt-get install libncursesw5-dev

# ソースコード取得
$ git clone https://github.com/jonas/tig.git
$ cd tig
$ git checkout -b my-build-2.0.1 tig-2.0.1

# ビルド, インストール
$ LDLIBS=-lncursesw CFLAGS=-I/usr/include/ncursesw make install prefix=$HOME/local

carlcarl

"""
module mydjangolib.bigint_patch

A fix for the rather well-known ticket #399 in the django project.

Create and link to auto-incrementing primary keys of type bigint without
having to reload the model instance after saving it to get the ID set in
the instance.

Logs:

carlcarl

<div class="container">
    <div class="row">
        <div class="col-sm-6 col-md-4 col-md-offset-4">
            <h1 class="text-center login-title">Sign in to continue to Bootsnipp</h1>
            <div class="account-wall">
                <img class="profile-img" src="https://lh5.googleusercontent.com/-b0-k99FZlyE/AAAAAAAAAAI/AAAAAAAAAAA/eu7opA4byxI/photo.jpg?sz=120"
                    alt="">
                <form class="form-signin">
                <input type="text" class="form-control" placeholder="Email" required autofocus>
                <input type="password" class="form-control" placeholder="Password" required>

carlcarl

# requires python 3.2.3 or higher
import concurrent.futures

def f(x):
    print ("working on task: %s" %{x})
    if x-1 > 0 :
        return x-1 # I want this task back in the queue.

def main():
    Queue = [x for x in range(4)]