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为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
...下载好的工程源码，关注页面底部公众号（或搜索“fun123cn”关注），回复“源码”即可免费下载。
代码编写
采用自己较为熟悉的java开发环境就行，这里推荐使用VSCode，拓展目录在 appinventor-sources/appinventor/com...
How to configure 'git log' to show 'commit date'
...ve.
For example:
$ git log --graph --pretty=format:'%C(auto)%h%d (%cr) %cn <%ce> %s'
You can define an alias in git to make this easier to use. I have the following in my .gitconfig:
[alias]
# see `git help log` for detailed help.
# %h: abbreviated commit hash
# %d: ref names, like t...
Select where count of one field is greater than one
...
I give an example up on Group By between two table in Sql:
Select cn.name,ct.name,count(ct.id) totalcity
from city ct left join country cn on ct.countryid = cn.id
Group By cn.name,ct.name
Having totalcity > 2
s...
How to fix SSL certificate error when running Npm on Windows?
...y whatever proxy my corporate overlords had installed. I resorted to using Cntlm on my local machine (unauthenticated), then had it handle the NTLM authentication with the upstream proxy. Then I had to tell all the programs that couldn't do NTLM to use my local machine as the proxy - which is genera...
Get output parameter value in ADO.NET
...ad]
static void Main(string[] args)
{
using( SqlConnection cn = new SqlConnection("server=(local);Database=Northwind;user id=sa;password=;"))
{
SqlCommand cmd = new SqlCommand("CustOrderOne", cn);
cmd.CommandType=CommandType.StoredProcedure ;
SqlParam...
SqlDataAdapter vs SqlDataReader
... minimum amount of code you should have when using a SqlDataReader:
Using cn As New SqlConnection("..."), _
cmd As New SqlCommand("...", cn)
cn.Open()
Using rdr As SqlDataReader = cmd.ExecuteReader()
While rdr.Read()
''# ...
End While
End Using
End Usi...
Better techniques for trimming leading zeros in SQL Server?
...pplication,
-- then you may skip the Case-Statement entirely and just use CN.CleanNumber .
DECLARE @WackadooNumber VarChar(50) = ' 0 0123ABC D0 '--'000'--
SELECT WN.WackadooNumber, CN.CleanNumber,
(CASE WHEN WN.WackadooNumber LIKE '%0%' AND CN.CleanNumber = '' THEN '0' ELSE CN.CleanNumber EN...
App Inventor 2 与 Mixly（米思齐）MixIO 平台数据通信方案完整调研 - 创客...
...O 服务器(Broker) -> 订阅者(Subscribe)- 官方主站：mixio.mixly.cn（Web 端口 8443/9090）- 支持私有部署：Windows / Linux / macOS，默认端口 8080- 数据频率限制：最大 5 次/500ms，建议间隔 >=2 秒/次- 开源许可证：MPL-2.0MixIO 平台内置了大量可视...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...uot;haoel", 37, "haoel@hotmail.com", "http://coolshell.cn"
end
name, age, email, website, bGay = getUserInfo()复制代码
注意：上面的示例中，因为没有传id，所以函数中的id输出为nil，因为没有返回bGay，所以bGay也是nil。局部函数函数...
How to give ASP.NET access to a private key in a certificate in the certificate store?
...9Certificate2 serverCert;
clientCert = GetCertificateIfExist("CN=127.0.0.1", StoreName.My, StoreLocation.LocalMachine);
serverCert = GetCertificateIfExist("CN=MyROOTCA", StoreName.Root, StoreLocation.LocalMachine);
if (clientCert == null || serverCert == null)
...