大约有 9,000 项符合查询结果（耗时：0.0192秒） [XML]
CREATE TABLE IF NOT EXISTS equivalent in SQL Server [duplicate]
...re name='cars' and xtype='U')
create table cars (
Name varchar(64) not null
)
go
The above will create a table called cars if the table does not already exist.
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Installed Ruby 1.9.3 with RVM but command line doesn't show ruby -v
...
> ruby -v
ruby 2.0.0p481
> rvm list
rvm rubies
ruby-2.1.2 [ x86_64 ]
=* ruby-2.2.1 [ x86_64 ]
ruby-2.2.3 [ x86_64 ]
Also, rvm current failed.
> rvm current
Warning! PATH is not properly set up, '/Users/randallreed/.rvm/gems/ruby-2.2.1/bin' is not at first place...
The error mes...
MFC 获取当前时间的几种方法总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...tm_minute = curTime.wMinute;
tmTime.tm_second = curTime.wSecond;
__time64_t curTime_64t = _mktime64(&tmTime);
struct tm st;
st.tm_year = atoi(strTime.substr(0, 4).c_str())-1900;
st.tm_mon = atoi(strTime.substr(5, 2).c_str());
st.tm_mday = atoi(strTime.substr(8, 2).c_str());
st.tm_hour = a...
解决IIS发布时global_asax的dll 的CS0433冲突问题 - 更多技术 - 清泛网 - ...
...e type 'ASP.global_asax' exists in both 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\925f9bdc\bb48a68c\App_global.asax.eptr0taj.dll' and 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\925f9bdc\bb48a68c\assembly\dl3\2dbf40e1\195f4379_8b0...
解决IIS发布时global_asax的dll 的CS0433冲突问题 - 环境配置 - 清泛IT社区，为创新赋能！
...e type 'ASP.global_asax' exists in both 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\925f9bdc\bb48a68c\App_global.asax.eptr0taj.dll' and 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\925f9bdc\bb48a68c\assembly\dl3\2dbf40e1\195f4379_8b0...
App Inventor 2 人脸识别App开发 - 第三方API接入的通用方法 · App Inventor 2 中文网
...组件调用第三方API，代码如下：
注：这里图片采用Base64的方式，压缩后进行Base64编码。用到 SimpleBase64 拓展 和 TaifunImage 拓展。
JSON结果的解析
aia源码
通过上面的步骤拆解及代码块参考，相信你一定能够完成基本功能的开...
HAXM 安装/启动失败？ - App Inventor 2 离线版 - 清泛IT社区，为创新赋能！
...200 39
handleCpuAcceleration: feature check for hvf
emulator: ERROR: x86_64 emulation currently requires hardware acceleration!
CPU acceleration status: Unable to open HAXM device: ERROR_FILE_NOT_FOUND
More info on configuring VM acceleration on Windows:
https://developer.android.com/st ... ler...
Configure WAMP server to send email
...example in the devside guide uses forwardslashes.
sendmail_path = "C:\wamp64\msmtp\msmtp.exe -d -C C:\wamp64\msmtp\msmtprc.ini -t --read-envelope-from"
mail.log = "C:\wamp64\msmtp\maillog.txt"
Create and edit the file msmtprc.ini in the same directory as your msmtp.exe file as follows, replacing...
Convert floats to ints in Pandas?
...>> cols = ['A', 'B']
>>> df[cols] = df[cols].applymap(np.int64)
>>> print(df)
... A B C D
... 0 8 0 1.916283 6.226750
... 1 1 9 9.277504 8.522808
... 2 1 4 2.700118 7.739108
Or for a single column with apply():
>>> df['C'] = df['C']...
使用Activity启动器组件 · App Inventor 2 中文网
...aia 文件），你可以按如下方式找到这些名称：
将源代码下载到你的计算机。
使用文件资源管理器或解压缩实用程序，找到名为 youngandroidproject/project.properties 的文件。
第一行以main=开头。 之后的所有内容都是包名和类名。
例...