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Converting a Java Keystore into PEM Format
...
bash$ keytool -keystore foo.jks -genkeypair -alias foo \
-dname 'CN=foo.example.com,L=Melbourne,ST=Victoria,C=AU'
Enter keystore password:
Re-enter new password:
Enter key password for
(RETURN if same as keystore password):
bash$ keytool -keystore foo.jks -exportcert -alias f...
How do you calculate the average of a set of circular data? [closed]
...a[i]-x
c = subset of a where the correct (angular) difference (a[i]-360)-x
cn = size of c
d = subset of a where the correct (angular) difference (a[i]+360)-x
dn = size of d
y = sum((b[i]-x)^2) + sum(((c[i]-360)-b)^2) + sum(((d[i]+360)-c)^2)
= sum(b[i]^2 - 2*b[i]*x + x^2)
+ sum((c[i]-360)^2 - 2*(c...
How do I remove the “extended attributes” on a file in Mac OS X?
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@cwd: the Finder drag-n-drop into terminal does not work with some 'special' Finder files such as . textClipping as described in apple.stackexchange.com/questions/301871/…
– ccpizza
Oct 12 '17 a...
How do I switch between the header and implementation file in Xcode 4?
...er. This is e.g. the case
when you open one of the files directly from the Finder. When you open the file from
the file list in Xcode, it normally works okay. Although when you have moved files between
folders & groups in the file list of Xcode, it will also list the relation between the files....
“Adobe Flash Player因过期而遭到阻止”的内幕起因和解决办法 - 更多技术 ...
...sh Player最新版本下载地址：https://get.adobe.com/flashplayer/?loc=cn
需要注意的是，有网友反映安装了最新版本也没有解决问题，网页Flash还是不正常。这时候我建议大家查看一下浏览器插件列表，确认一下18.0.0.209的Flash Player是否替换...
Xcode duplicate line
...missions: changing them (only for the file itself; no recursion needed) in Finder worked just fine.
– Blaz
Apr 29 '12 at 11:13
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上线当天App就崩了，才发问题是手机网络超时没处理——用App Inventor 2的W...
...考文档：App Inventor 2 Web客户端完整文档 → https://www.fun123.cn/reference/components/connectivity.html
JSON解析案例：JSON转字典教程 → https://www.fun123.cn/reference/blocks/dictionaries.html
文件上传方案：App Inventor 2 文件上传到服务器全方案总结...
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
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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...