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Append an object to a list in R in amortized constant time, O(1)?
...n performance. For example, the by_index solution, a very popular solution based on the frequency with which I find it in other SO posts, took 11.6 milliseconds to append 2000 objects, and 953 milliseconds to append ten times that many objects. The overall problem's time grew by a factor of 100, so ...
Create an empty list in python with certain size
...ect. So unless you simply want 10 copies of the same object, use the range based variant as it creates 10 new objects. I found this distinction very important.
– Mandeep Sandhu
Apr 23 '18 at 18:29
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Cannot change version of project facet Dynamic Web Module to 3.0?
... I also had to do this. I was using a Spring web project with a Java-based configuration, so updating a web.xml wasn't possible for me.
– bcody
Apr 6 '14 at 13:12
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How to check if a given directory exists in Ruby
... write a script which automatically checks out or updates a Subversion URL based on whether a specified directory exists or not.
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tcp加速技术解决方案 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...多通道和内存条rank级并行优化。一个内存通道一般使用64位数据总线，双通道同时工作提供了128位传输能力。Rank是指DIMM上几个内存颗粒共同提供的64位数据，同一条内存上的不同rank因为共享数据总线而不能被同时访问，但内存...
How do you change the server header returned by nginx?
...olution doesn't require any special software extension, and works with the base nginx.
– Kris
Dec 5 '17 at 23:54
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Visual Studio debugging “quick watch” tool and lambda expressions
...running an anonymous function changes the underlying structure of the code base. Changing the code, in general, and in particular from the immediate window, is a very difficult task.
Consider the following code.
void Example() {
var v1 = 42;
var v2 = 56;
Func<int> func1 = () => ...
How to read a text-file resource into Java unit test? [duplicate]
...
With the use of Google Guava:
import com.google.common.base.Charsets;
import com.google.common.io.Resources;
public String readResource(final String fileName, Charset charset) throws Exception {
try {
return Resources.toString(Resources.getResource(fileName),...
Removing rounded corners from a element in Chrome/Webkit
...ckground image with position 100% 50% and no-repeat attribute. I also used base64 encoded image in css to avoid additional http requests.
– Karl Adler
Jul 23 '14 at 12:27
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EC2 Can't resize volume after increasing size
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Stop the instance
Create a snapshot from the volume
Create a new volume based on the snapshot increasing the size
Check and remember the current's volume mount point (i.e. /dev/sda1)
Detach current volume
Attach the recently created volume to the instance, setting the exact mount point
Restart th...