# 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/5m7fucq
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Go 每日一庫之 roaring
簡介--集合是軟件中的基本抽象。實現集合的方法有很多，例如 hash set、tree 等。要實現一個整數集合，位圖（bitmap，也稱爲 bitset 位集合，bitvector 位向量）是個不錯的方法。使用 n 個位（bit），我們可以表示整數範圍[0, n)。如果整數 i 在集合中，第 i 位設置爲 1。這樣集合的交集（intersection）、並集（unions）和差集（differen ⌘ Read more