WanCW's Study Notes

October 29, 2009

Wise programming techniques for writing quality code

Think before coding
Fix bugs immediately
Test individual functional elements
Test complete puzzle
Write robust code components
Fail as early as possible
Avoid quick hacks
Use defensive programming
Prefer strong typing over dynamic binding
Write self-explanatory code
Avoid sophisticated code
Avoid dense code blocks
Avoid code duplication
Avoid magic constants
Strive for loose coupling
Avoid hidden dependencies
Strive for flat responsibility distribution
Keep related code close together
Build a house, not an empire
Redesign when needed
Do not sacrifice quality

via Developer Art

Filed under // Software Develop

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October 9, 2009

IE conditional comment gotcha

<!-- [if IE]> (bad)
<!--[if IE]> (good)

via The Strange Zen Of JavaScript

Filed under // HTML IE Web Develop

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September 29, 2009

10件敏捷專案時間管理原則

利用DoD (Defintion of Done)

使用時間框(timeboxes)去管理工作

不要在自己的工作評估時保留buffer

延遲再決定

縮短生產週期

保持pipeline短而細

維持紀律

限制工作互換

預防持續的加班

分離急迫性和重要性

節錄自 David Ko的學習之旅

Original post: 10 Principles of Agile Project Time Management

Filed under // Agile Software Develop Time Management

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September 3, 2009

用iTunes製作鈴聲

via blog.jcms.com.tw

Filed under // iPhone

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August 30, 2009

Prevent a Dotted Border around a Hyperlink when clicked in FireFox

a:focus {
outline: none;
}

via devcurry.com

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July 31, 2009

How to think about OO

節錄自 Google Testing Blog: How to think about OO

Static methods ⇒ 不是 OO！
沒有用到成員資料的 instance methods ⇒ 不是 OO！
（無異於 static methods。）
method 應該屬於與之互動最多的 object。
多數的條件分支（if、switch）都可以用多型方式取代。
不需要一併作 serialization/persistence 的資料以參數方式使用即可，
不要作為成員變數。
不要為不確定的「如果……」付出太多心力。

Filed under // OOP

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July 31, 2009

The 5 Static Code Audits every developer should know and use

Numerical Literal in Code ⇒ give a meaningful name.

String Literal ⇒ retrieve string from resource bundle.

god Method/Class/Package:
3 audits: Long Methods, Long Parameters, and Switch statements.
4 metrics: Line of Code (LOC), Number of Parameters (NOP), Number of Local Variables (NOLV), and Maximum Number of Branches (MNOB).

Shotgun Surgery:
2 metrics: Changing Methods (CM) and Changing Classes (ChC).

Duplicate code

via javaworld.com

Filed under // Code Review

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July 30, 2009

12 Things to Shorten Your Lead Time in Software Development

Measure, measure, measure

Increase quality

Reduce rework

Frequent releases

Stop working in parallel

Shorter stories

Visualize and manage flow

Rigorously cancel meetings

Continuous deployment

Shorten product management

No single point of failure or bottleneck

Leveling work

via codemonkeyism.com

Filed under // Software Develop

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July 30, 2009

Best way to load your JavaScript

function loadScript(url, callback){
 
    var script = document.createElement("script")
    script.type = "text/javascript";
 
    if (script.readyState){  //IE
        script.onreadystatechange = function(){
            if (script.readyState == "loaded" ||
                    script.readyState == "complete"){
                script.onreadystatechange = null;
                callback();
            }
        };
    } else {  //Others
        script.onload = function(){
            callback();
        };
    }
 
    script.src = url;
    document.getElementsByTagName("head")[0].appendChild(script);
}

via ajaxian.com

Filed under // JavaScript Web Develop

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July 29, 2009