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What's the $unwind operator in MongoDB?
...m",
"XL",
"free"
]
}
Query -- db.test1.aggregate( [ { $unwind : "$sizes" } ] );
output
{ "_id" : 1, "shirt" : "Half Sleeve", "sizes" : "medium" }
{ "_id" : 1, "shirt" : "Half Sleeve", "sizes" : "XL" }
{ "_id" : 1, "shirt" : "Half Sleeve", "sizes" : "free"...
Converting a Java Keystore into PEM Format
...keytool
keytool -exportcert -alias selfsigned -keypass password -keystore test-user.jks -rfc -file test-user.pem
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How to create GUID / UUID?
...16);
});
}
console.log(generateUUID())
Here's a fiddle to test.
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What's the difference between HEAD^ and HEAD~ in Git?
...splays the immediate ancestors’ object names.
commit 89e4fcb0dd01b42e82b8f27f9a575111a26844df
Merge: c670b1f876 649bf3a42f b67d40adbb
Author: Junio C Hamano <gitster@pobox.com>
Date: Mon Oct 29 10:15:31 2018 +0900
Merge branches 'bp/reset-quiet' and 'js/mingw-http-ssl' into nd/config...
通信连接组件 · App Inventor 2 中文网
... 属性
事件
方法
SimpleBase64 拓展
属性
事件
方法
MqttClient 拓展
ClientSocket 拓展
属性
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方法
已...
Win10正式版官方原版ISO镜像下载大全（64位&32位） - 软件下载 - 清泛网 - ...
...s_10_multiple_editions_x64_dvd_6848463.iso|4303300608|94FD861E82458005A9CA8E617379856A|/
【32位简体中文家庭/专业版】
文件名：cn_windows_10_multiple_editions_x86_dvd_6846431.iso
体积：3.01GB
SHA1：21B824F402927E76C65160B62EB8A4EBBABE9C6E：
...
How do you convert a byte array to a hexadecimal string, and vice versa?
...of the various conversion methods through some crude Stopwatch performance testing, a run with a random sentence (n=61, 1000 iterations) and a run with a Project Gutenburg text (n=1,238,957, 150 iterations). Here are the results, roughly from fastest to slowest. All measurements are in ticks (10,000...
IE无法设置短域名下Cookie - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的人有帮助。
原文链接：http://www.imkevinyang.com/2010/09/ie%E6%97%A0%E6%B3%95%E8%AE%BE%E7%BD%AE%E7%9F%AD%E5%9F%9F%E5%90%8D%E4%B8%8Bcookie.html
短域名 Cookie
xunsearch主键重复、搜索结果重复 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...认已升级成功，请参考：https://fun123.cn/?q=%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8B+xunsearch+%E7%89%88%E6%9C%AC&x=0&y=0xunsearch 主键重复
- App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
当然可以，它是 app 范围内共享的持久化数据，app 退出后数据也会保留。
更多可参考：https://www.fun123.cn/reference/creative/screen_communication.html#%E5%BE%AE%E6%95%B0%E6%8D%AE%E5%BA%93%E4%BC%A0%E5%80%BC