IT界討論區(58) 唔講上一份人工

Right, but I’m just curious of the approach.

My personal experience is design pattern shows up after I finished writing the code, rather than I write code following the design pattern.

My backend can just node js no need Singleton or even EN framework simpler than simple

的確係
但我覺得本身singleton個原意同現實上用法都好大差距
普遍用法都係鳩寫singleton然後唔thread safe

我寧願事鳩旦new

你諗太多了
design pattern只係幫助
你去design一個solution出黎嗰陣係要解決個問題而唔係完美咁fit any design pattern
a hard coded app is a gd app if it fits user requirement

Agger
我諗既野唔係直接諗用咩design pattern
而係諗點樣令下一手同事睇得明 為此有咩細節要改 當中可能包 亦可能唔包design pattern

Design pattern呢個term與其話係一個目標 不如話係一個總結
唔係比你預先去朝住佢黎行 而係你行到一定距離個時可以用黎對比下 睇下有冇啟發令你行得更好

最近見份工ap, 個hr問乜撚野管人經驗，vendor management經驗，唔知點解好想屌鳩佢

我做過幾份工，上司都係亂鳩咁黎，有咩唔識 唔知, project estimation問返個下屬就得，同我講管人經驗？？唔好引鳩我笑啦

唔係諗太多
係最近有條友問我用得最多嘅Design Pattern係乜，所以想做吓Reality Check係我唔識定條友離地。

不過咁諗好似係我Get錯個問題。

interview問呢啲九成都係吹水題
識吹好過識做

咁係你做啲工閪啫
有management exp in team/project/vendor係幾重要的
佢冇問錯

下次直接叫佢收嗲算

Management好重要但IT部唔過50人嘅公司講Methodology真心浪費時間

咁又唔係
agile一向ideal係team of size 4-10ppl only

But that’s 4-10 working on same project wor

If whole IT dept 10 people then...

我諗佢都係想認識下你啫 你咪講下對design pattern既睇法

My real design pattern = google -> stackoverflow

呢個係workflow喎

冇話佢問錯，佢純粹問有冇 完全冇specific野問
咁係你會點問，我唔覺有咩難度係到

我依家寫code
多數係DI framework加埋immutable object
再無特別用GOF Design pattern

都係個句
有真正需求先會諗用邊種design

我通常問自己
個object 有無changeable state？
如果有要點樣handle multiple thread access?
如果無係咪一定要Singleton?(e.g. Java static method class,aka helper class, aka I-dont-know-where-to-put-those-methods class)
仲有無alternative?
例如我10個Java application 10個都要求用Spring
會唔會用DI+immutable object？
定真係可以new object 算？

Singleton 無問題
只係我通常用唔到

可能佢隨口問
睇你知唔知咩叫Design Pattern
你照直答你用過咩咪算

問題係我嚴格嚟講乜都冇用過

無用過都好合理
望下SI 一堆爛code
又有同你講咩Design Pattern 咩
一樣未死得

以前都被人問過用邊隻 pattern 多，我答佢我真係無背 pattern 名
宜家我仲用得少，寫到咁複雜，最後其實都唔需要咁 flexible

好既design係可以分清每一層layer of abstraction
每次改code我只係concern一個layer，而唔使擔心搞到其他layer，我個腦唔會cognitive overload

唔好既design就係某一d layer既logic depend on 幾個layer之前／後既野
例如reporting layer 直接query database 拎user資料

singelton本身都冇問題 只係如果唔同layer都access呢個class，而又係mutable 就會出事

我in都有俾人問design pattern
但其實應該點答？
睇完wiki個list，頂啲技巧咁細微可能呢度用左啲嗰度用左過啲，有啲直情寫過code就會掂到架啦，好空泛喎