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Count number of objects in list [closed]
R function that will return the number of items in a list?
5 Answers
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What's the opposite of chr() in Ruby?
In many languages there's a pair of functions, chr() and ord() , which convert between numbers and character values. In some languages, ord() is called asc() .
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Java Security: Illegal key size or default parameters?
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Drop unused factor levels in a subsetted data frame
I have a data frame containing a factor . When I create a subset of this dataframe using subset or another indexing function, a new data frame is created. However, the factor variable retains all of its original levels, even when/if they do not exist in the new dataframe.
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【最全】CSS响应式布局的5种实现方式 - 更多技术 - 清泛网 - 专注C/C++及内核技术
【最全】CSS响应式布局的5种实现方式css_responsive_layout响应式设计通过检测视口分辨率，针对不同客户端在客户端做代码处理，来展现不同的布局和内容；响应式布局的 5 种实现方案百分比布局媒体查询布局rem 响应式布局vw 响应...
Using OpenGl with C#? [closed]
Is there free OpenGL support libraries for C#? If so, which one do I use and where do I find sample projects?
9 Answers
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驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - ...
...的控制。
为什么是 OOM Killer？
主要发行版内核设置/proc/sys/vm/overcommit_memory的默认值 为零，这意味着进程可以请求比系统中当前可用的内存更多的内存。这是基于试探法完成的，即分配的内存不会立即使用，并且进程在其生命...
驯服Linux OOM Killer（优质英文资料翻译） - 操作系统(内核) - 清泛网 - ...
...的控制。
为什么是 OOM Killer？
主要发行版内核设置/proc/sys/vm/overcommit_memory的默认值 为零，这意味着进程可以请求比系统中当前可用的内存更多的内存。这是基于试探法完成的，即分配的内存不会立即使用，并且进程在其生命...
Java 8 List into Map
I want to translate a List of objects into a Map using Java 8's streams and lambdas.
21 Answers
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Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
I feel like I must just be unable to find it. Is there any reason that the C++ pow function does not implement the "power" function for anything except float s and double s?
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