From Test-Scratch-Wiki
2000年迄今日数 | |
2000年迄今日數 | |
类别 | 侦测类积木 |
形狀 | 椭圆形积木 |
加入於 | 2.0 |
The Days Since 2000 积木 is a 侦测类积木 and a 椭圆形积木. It reports the amount of days (and fractions of a day) since 00:00:00 1 January 2000 (UTC), and is a replacement of the Scratch 日迄今日数 block, which never made the official release of 2.0.
It is one of the two date/time blocks in Scratch. The other is 目前时间的 (), which reports the date or time. Both these blocks can be worked in unison with one another for a variety of time-related scripts and projects.
用法示例
This block can be used in some of the following ways:
- Making a countdown
說出 (字串組合 ((9132) - (2000年迄今日數)) 和 [ days till 2025!])
- Making something unavailable before or after a certain date
如果 <(2000年迄今日數) < (5479)> 那麼 變數 [money v] 改變 [1000] 說出 [This feature is unavailable after 2015.] end
- Corresponding real-life events with projects
定義 mark (event) for (value) days from now 新增項目 ((2000年迄今日數) + (value)) \( [eventDates v] \) 新增項目 (event) \( [eventNames v] \) 定義 search calendar for (event) 變數 [i v] 設為 (0) 重複直到 <<(i) > (清單 [eventNames v] 的項目數 :: list)> 或 <(清單第 (i) 項項目\( [eventNames v] \) :: list) = (event)>> 變數 [i v] 改變 (1) end 如果 <(i) > (清單 [eventNames v] 的項目數 :: list)> 那麼 變數 [output v] 設為 (字串組合 (字串組合 [Your search for ] 和 (event)) 和 [ was not found.]) 如果 <(2000年迄今日數) < (清單第 (i) 項項目\( [eventDates v] \) :: list)> 那麼 變數 [output v] 設為 (字串組合 (字串組合 (字串組合 (字串組合 [Your event ] 和 (event)) 和 [ is in ]) 和 ((清單第 (i) 項項目\( [eventDates v] \) :: list) - (2000年迄今日數))) 和 [ days]) 如果 <(2000年迄今日數) = (清單第 (i) 項項目\( [eventDates v] \) :: list)> 那麼 變數 [output v] 設為 (字串組合 (event) 和 [ is today!]) 變數 [output v] 設為 (字串組合 (字串組合 [This event happened ] 和 ((2000年迄今日數) - (清單第 (i) 項項目\( [eventDates v] \) :: list))) 和 [ days ago.]) end end end
应用
- Main article: List of Block Workarounds
Where d = days since 2000:
變數 [d v] 設為 ((((367) * (year)) - ([floor v] 數值 (((7) * ((year) + ([floor v] 數值 (((month) + (9)) / (12))))) / (4)))) + ((([floor v] 數值 (((275) * (month)) / (9))) + (day)) - (730530))) 如果 <(d) < [-36435]> 那麼 變數 [d v] 改變 (1) end 如果 <(d) < [-72990]> 那麼 變數 [d v] 改變 (1) end 如果 <(d) > [36585]> 那麼 變數 [d v] 改變 (-1) end 變數 [d v] 改變 (-1)
Correct from 1800-2199.