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Which method performs better: .Any() vs .Count() > 0?
...th or .Count (such as ICollection<T>, IList<T>, List<T>, etc) - then this will be the fastest option, since it doesn't need to go through the GetEnumerator()/MoveNext()/Dispose() sequence required by Any() to check for a non-empty IEnumerable<T> sequence.
For just IEnumerabl...
Can I use Twitter Bootstrap and jQuery UI at the same time?
...rtino" at the bottom as my theme.
I installed them thus:
<head>
...etc...
<link rel="stylesheet" href="css/font-awesome.min.css">
<link rel="stylesheet" href="css/cupertino/jquery-ui-1.9.2.custom.min.css">
<link rel="stylesheet" href="css/bootstrap-3.3.7.min.css">
<!-- ...
Are there conventions on how to name resources?
... how to name resources in Android? For example, buttons, textViews, menus, etc.
15 Answers
...
Dynamic variable names in Bash
..." # outputs “lolilol”
echo "${!name%lol}" # outputs “loli”
# etc.
Unfortunately, there is no counterpart syntax for modifying the aliased variable. Instead, you can achieve assignment with one of the following tricks.
1a. Assigning with eval
eval is evil, but is also the simplest and ...
App Inventor 2 DynamicComponents 拓展：动态创建AI2组件对象 · App Inventor 2 中文网
...t.
When replacing an ID, it will loop through ALL IDs and replace each one that contains the old ID! Even if the ID you're wanting to replace is "Timmy", but there are IDs like "Timmy-truck". To be clear again, only "Timmy" from "Timmy-truck" will be replaced, the "-truc...
使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...hyay, D., & Sen, J. (2011). Internet of things: Applications and challenges in technology and standardization. Wireless Personal Communications, 58(1), 4969.
[2] Wolber, D., Abelson, H., Spertus, E., & Looney, L. (2011). App Inventor. ” O’Reilly Media, Inc.”.
[3] Macke...
自动生成Linux下Makefile全攻略（automake原理） - C/C++ - 清泛网 - 专注C/C++及内核技术
...configure 输出Makefile文件
2、make 输出二进制
3、make install 安装二进制到指定目录
make及make install的规则都需要参照Makefile文件，而Makefile是自动生成的，大家有兴趣可以查看下Makefile，代码很长很复杂。当然我们可以直接在Mak...
了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术
...即使其他程序在访问同一文件也如此！
unsigned long remove_all(const path& p)：此 API 尝试删除路径 p 所引用的文件或目录。与 remove 不同，此函数并不会特殊考虑不为空的目录。此函数是 UNIX rm –rf 命令的 Boost 对等项。
实用工具...
Javascript regex returning true.. then false.. then true.. etc [duplicate]
.... In JavaScript, global regexen have state: you call them (with exec, test etc.) the first time, you get the first match in a given string. Call them again and you get the next match, and so on until you get no match and it resets to the start of the next string. You can also write regex.lastIndex= ...
What is an ORM, how does it work, and how should I use one? [closed]
...bases but the most popular is relational ( you know tables, columns, pk fk etc eg Oracle MySQL, MS-SQL )
And finally the Mapping part is where you do a bridge between your objects and your tables.
In applications where you don't use a ORM framework you do this by hand. Using an ORM framework wou...