# I am the Watcher. I am your guide through this vast new twtiverse.
# 
# Usage:
#     https://watcher.sour.is/api/plain/users              View list of users and latest twt date.
#     https://watcher.sour.is/api/plain/twt                View all twts.
#     https://watcher.sour.is/api/plain/mentions?uri=:uri  View all mentions for uri.
#     https://watcher.sour.is/api/plain/conv/:hash         View all twts for a conversation subject.
# 
# Options:
#     uri     Filter to show a specific users twts.
#     offset  Start index for quey.
#     limit   Count of items to return (going back in time).
# 
# twt range = 1 1
# self = https://watcher.sour.is/conv/txqhcva
購物車系統的設計**
在電商平臺中,購物車是一個非常核心的功能,用戶瀏覽商品的過程中,他們可以將感興趣的商品加入購物車方便後面挑選和下單。購物車功能的設計對於提升用戶體驗、增加公司商品銷售量都有重要影響。   上圖是一個典型的電商購物車的圖,購物車協助用戶選購商品時提供如下的功能:(1)加入商品:用戶可以將商品加入購物車,並選擇商品的數量。(2)刪除商品:用戶可以從購物車中刪除不想要的商品。(3)修改商品數量:支 ⌘ Read more