IT界討論區(72) 1001開Post喇喂

舊post
(1): https://lihkg.na.cx/thread/4990/page/1
(2): https://lihkg.na.cx/thread/69444/page/1
(3): https://lihkg.na.cx/thread/89460/page/1
(4): https://lihkg.com/thread/116590/page/1
(5): https://lihkg.com/thread/130061/page/1
(6): https://lihkg.com/thread/148992/page/1
(7): https://lihkg.com/thread/170835/page/1
(8): https://lihkg.com/thread/208042/page/1
(9): https://lihkg.com/thread/233717/page/1
(10): https://lihkg.com/thread/250870/page/1
(11): https://lihkg.com/thread/269901/page/1
(12): https://lihkg.com/thread/287135/page/1
(13): https://lihkg.com/thread/303147/page/1
(14): https://lihkg.com/thread/323813/page/1
(15): https://lihkg.com/thread/346843/page/1
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(17): https://lihkg.com/thread/407488/page/1
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(61): https://lihkg.com/thread/1101303/page/1

(62): https://lihkg.com/thread/1122848/page/1
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(69):https://lihkg.com/thread/1494024/page/1
(70):https://lihkg.com/thread/1657743/page/1
(71)https://lihkg.com/thread/1658094/page/1

P仔 頂爛市參考價 ：
乜都唔識 + HD： 16k - 18k
識少少 + HD： 17k-19k
u grad + 白紙： 18k~25k
P仔 頂爛市參考價 ：
乜都唔識 + HD： 16k - 18k
識少少 + HD： 17k-19k
u grad + 白紙： 18k~25k

年尾真係冇咩朋友仔轉工, Java人缺到不得了

lm

唔知點解map個state object出黎果陣彈 cannot read property 'map' of undefined出黎，有冇react巴打幫下眼

check 下個products係咪一個array type...

下次試下cut 完圖 連埋 error 先 upload

咁樣點睇啊

係撚
佢個this.state.products = undefined

所以咪叫佢check下

冇error,佢係返到2個object,如果就咁係render到{this.state.products} 就會顯示果兩個json

係呀。。。

誤中

cap到咁好難幫你

想做既野都係曬頁，我想做既野就係係backend到攞products 既data,咁正常就會response
{id:1 , item:apple , price:100} {id:2 , item:orange , price : 200}咁既，我係console都見到係成功response 既，咁跟住我想係render 到用map return 個ul 出黎既，但去到呢步就唔知點解li係空白咗

因為第一次render係didmount之前
我既做法係係render果度加個if check product有野先return

唔該巴打，睇黎我對life cycle 仲未完全掌握

ul 可以配 p 㗎咩
同埋用 map 漏 pass key 入 個 element props, React 會屌你

另外學試用 React hooks 同 high order component 對你有利