大约有 40,000 项符合查询结果（耗时：0.0538秒） [XML]
What is the difference between buffer and cache memory in Linux?
...ed (thus the total page cache size is Cached + SwapCached). Linux performs all file I/O through the page cache. Writes are implemented as simply marking as dirty the corresponding pages in the page cache; the flusher threads then periodically write back to disk any dirty pages. Reads are implemented...
Turning off some legends in a ggplot
...
You can use guide=FALSE in scale_..._...() to suppress legend.
For your example you should use scale_colour_continuous() because length is continuous variable (not discrete).
(p3 <- ggplot(mov, aes(year, rating, colour = length, shape = mpaa)) +
sca...
ipython: print complete history (not just current session)
...
First use %hist -o -g -f ipython_history.md to output the history (input and output) to a text file. (http://ipython.readthedocs.io/en/stable/interactive/magics.html#magic-history)
Then you can use the the get_session_info function to retreive the date and...
iOS Detect 3G or WiFi
...
Shouldn't you call [reachability stopNotifier] after you have the status?
– zekel
Nov 9 '11 at 18:41
3
...
How to Generate unique file names in C#
...e:
public string GenerateFileName(string context)
{
return context + "_" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + "_" + Guid.NewGuid().ToString("N");
}
filename1 = GenerateFileName("MeasurementData");
filename2 = GenerateFileName("Image");
This way, when I sort by filename, it will aut...
Jackson enum Serializing and DeSerializer
...
I really dislike this solution for the simple fact that you introduce two sources of truth. The developer will always have to remember to add the name in two places. I much prefer a solution that just does the right thing without...
Cannot read configuration file due to insufficient permissions
... is same as above, but a little longer and simpler and improved.
First of all: you don't have to change anything in your config file. It's OK. The problem is with windows file permissions.
This problems occurs because your application can not access and read web.config file.
Make the file accessi...
How do I programmatically click a link with javascript?
...
Actually, so far it worked in all browsers I tried, including IE, Safari, Chrome, Firefox and Opera.
– arik
Jan 29 '12 at 17:17
...
MAC addresses in JavaScript
...
I concur with all the previous answers that it would be a privacy/security vulnerability if you would be able to do this directly from Javascript. There are two things I can think of:
Using Java (with a signed applet)
Using signed Javasc...
Can you call Directory.GetFiles() with multiple filters?
...er,
var files = Directory.EnumerateFiles("C:\\path", "*.*", SearchOption.AllDirectories)
.Where(s => s.EndsWith(".mp3") || s.EndsWith(".jpg"));
For earlier versions of .NET,
var files = Directory.GetFiles("C:\\path", "*.*", SearchOption.AllDirectories)
.Where(s => ...