ikbear

#此DEMO的功能：查询手机类的淘客商品
require 'digest/md5'
require 'net/http'
require 'open-uri'
require 'iconv'

#获得当前时间
t = Time.new();

#组装参数

ikbear

Memory management

Each process have its own stack and heap, while threads share common heap.

• Elements of a process
• Memory Allocation/Deallocation Bottleneck?
• Do different programs gets their memory from a common heap or from a separate heap?

ikbear

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()

ikbear

Learn JavaScript concepts with the Chrome DevTools

Authored by Peter Rybin , Chrome DevTools team

In this short guide we'll review some new Chrome DevTools features for "function scope" and "internal properties" by exploring some base JavaScript language concepts.

Closures

Let's start with closures – one of the most famous things in JS. A closure is a function, that uses variables from outside. See an example:

ikbear

# 30 minutes Lisp in Ruby
# Hong MinHee <http://dahlia.kr/>
#
# This Lisp implementation does not provide a s-expression reader.
# Instead, it uses Ruby syntax like following code:
#
#     [:def, :factorial,
#       [:lambda, [:n],
#         [:if, [:"=", :n, 1],
#               1,

ikbear

#!/bin/bash

BACKUP_DIR='/home/rsync/mysql_backup'

MHOST='localhost'
MUSER='root'
MPASS='yourpass'

NOW=$(date +"%Y-%m-%d_%H")

ikbear

ctrl-z
bg

touch /tmp/stdout
touch /tmp/stderr
gdb -p $!

# In GDB
p dup2(open("/tmp/stdout", 1), 1)
p dup2(open("/tmp/stderr", 1), 2)

ikbear

Game Engines

Name	Latest Release	Size (KB)	License	Type	Unit Tests	Docs	Notes
The Render Engine	1.5.3		MIT				Cross-browser; extensive API; open-source. 2
gameQuery	0.5.1		CC BY-SA 2.5				Designed to be used with jQuery
gTile	0.0.1 (2008-07-21)			Tile based
Akihabara	1.3		GPL2/MIT	Classic Repro			Intended for making classic arcade-style games in JS+HTML5 3
The Javascript 2D Game Engine			GPL				Emphasis on gravity/physics/collision detection; uses HTML5 Canvas and ExplorerCanvas for IE support. Focus on limiting CPU usage. 4
The GMP Javascript Game Engine

ikbear

Setup new Mac with OSX Lion from scratch

These commands are good as of 2011-07-27.

Install xcode 4

App store http://itunes.apple.com/us/app/xcode/id448457090?mt=12) The download/install takes awhile so start it first. When it finishes downloading you will still need to run it to complete installation.

iTerm2 http://www.iterm2.com/

ikbear

Setup new Mac with OSX Lion from scratch

These commands are good as of 2011-07-27.

Install xcode 4

App store http://itunes.apple.com/us/app/xcode/id448457090?mt=12) The download/install takes awhile so start it first. When it finishes downloading you will still need to run it to complete installation.

iTerm2 http://www.iterm2.com/