# 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/lscgyqa
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Go: 誤用sync-WaitGroup**
sync.WaitGroup 是一種等待 n 個操作完成的機制，通常，我們使用它來等待 n 個 goroutine 完成。下面將學習它的使用方法，然後將看到一個高頻錯誤使用問題，以及這個問題導致的不確定性行爲。下面的代碼創建了一個 sync.WaitGroup 對象，並且爲默認的零值。wg := sync.WaitGroup{}在內部實現上，sync.WaitGroup 擁有一個默認初始化零的內部 ⌘ Read more=