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App Inventor 2 多用户预订系统如何设计？ - App Inventor 2 中文网 - 清泛...
问：我遇到了一个难题，我开发了一个软件，两个手机都安装了同一个软件，我在一个手机上显示按钮已经不能启用，但在另一个手机上该按钮确还能用，我的目标是这个跟酒店房间一样，当某个房间有人订了，其他人就不能订...
短信验证码输入比对逻辑编写 - App应用开发 - 清泛IT社区，为创新赋能！
...证码进行比较，验证是否正确，如果正确的话则跳转到下一个屏幕问题在于你的验证码生成了2次，两次随机值肯定是不一样啊。
解决：用一个全局变量，点发送验证码的时候，存一下刚刚生成好的验证码，点登录时，用户输入...
想试着做一个间歇运动的计时器 - App应用开发 - 清泛IT社区，为创新赋能！
本帖最后由 碳水哥斯拉 于 2025-05-08 23:37 编辑
用deepseek生成了代码 使用AI2 遇到了问题
to formatTime seconds
set minutes to (seconds / 60)
set secs to (seconds - (minutes * 60))
return join strings( padZero(minutes), ":",...
reading from app.config file
...ion.ConfigurationFile i get C:\\Program Files\\Microsoft Office\\OFFICE11\\exCEL.EXE.config which is not my config file... what should i do
– Sathish
Mar 8 '10 at 8:58
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What is the difference between sigaction and signal?
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Excellent sigaction() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…; and excellent signal() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…. Notice that in the signal demo they avoi...
Keep only date part when using pandas.to_datetime
....
pd.to_datetime(df['Date'], utc=False)
You will be able to save it in excel without getting the error "ValueError: Excel does not support datetimes with timezones. Please ensure that datetimes are timezone unaware before writing to Excel."
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Using .NET, how can you find the mime type of a file based on the file signature not the extension
...},
{"xhtml", "application/xhtml+xml"},
{"xls", "application/vnd.ms-excel"},
{"xml", "application/xml"},
{"xpm", "image/x-xpixmap"},
{"xsl", "application/xml"},
{"xlsx","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
{"xltx","a...
How to show multiline text in a table cell
...rap our content works fine, but due to the use of this table (exporting to excel), large #s of columns and rows balloon the size of the exported file and cause excel to crash upon reading the file. (odd, I know). Has anyone else seen this or have an idea for a solution?
– JoeBr...
Ruby off the rails
... exist for this purpose.
I highly recommend Googling "ruby dsl" for some excellent reading, but I would like to leave you with one post in particular. Russ Olsen wrote a two part blog post on DSLs. I saw him give a presentation on DSLs and it was very good. I highly recommend reading these posts.
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Standard deviation of a list
...of numpy.std is not correct. Given these values: 20,31,50,69,80 and put in Excel using STDEV.S(A1:A5) the result is 25,109 NOT 22,45.
– Jim Clermonts
Oct 1 '15 at 9:28
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