# 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/oxsfogq
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BigDecimal 爲什麼可以不丟失精度？**
在金融領域，爲了保證數據的精度，往往會使用 BigDecimal。本文就來探討下爲什麼 BigDecimal 可以保證精度不丟失。類介紹---首先來看一下 BigDecimal 的類聲明以及幾個屬性：public class BigDecimal extends Number implements ComparableBigDecimal {    // 該BigDecimal的未縮放值    p ⌘ Read more