IT討論區(117) 不開post的人

唔係
Btw左右利都唔關事

自己deduce下

手巴個理解幾好，個人覺得smart contract 同blockchain應用除咗cryptocurrency 之外，nft 好似好格硬嚟，用嚟整game，當做database 個資源成本好大，冇乜economic incentive好難維持落去

定時=睇chain有冇個個時間之後既entry
唔好追求即時性 因為block chain無即時性 只可以追求正確性

都係其中一個方法

其實可以同朋友一齊住share屋租。Silicon Valley而家大公司fresh grad人工過12萬美金一年，另外加股票同bonus，成個package pre-tax 17～18萬一年唔難搵。呢個income range應該overall扣1/3稅. 人工 after tax大約係6700 USD一個月。如果同人share 個2BD apartment應該2000蚊以下一個人。落袋仲有4～5000 USD一個月（已經扣稅同埋同人share屋租，未計股票同bonus），應該好過香港fresh grad。

有啲FP language例如Haskell，scheme本身無loop construct，要loop嘅話要用tail recursion黎做。

如果pass去map-reduce，filter嘅function有side effects，例如改global variable，執行I/O等。咁唔係好functional。

我有講過

引戰

FP languages are just stupid
You can always (stupidly) rewrite int foo(goo&) into tuple<int, goo> foo(goo)
It maybe useful for parallelism, but hey it’s about the person not the language: one can write efficient no-side-effect OOP code if s/he is careful
Aaaaaaand most of the time we don’t need extremely no-side-effect restriction, we just want the side effects not “overlap” with each other

想揾

CRUD型手巴

咪就係已經講左基本上睇人
oop絕對可以寫到fp咁優雅

而fp又絕對唔係冇side effect
唔通整到print唔到落console又寫唔到野入db
更加send唔到packet 玩野咩

fp嘅pure應該唔係話完全無side effect，純粹係有side effect嘅code同無side effect嘅code分開。有d似abstract class咁你一定有一個function係abstract就成個class abstract
Haskell就係一旦有個function係IO/side effect，咁所有用佢嘅function都係side effect function