大约有 20,000 项符合查询结果（耗时：0.0339秒） [XML]
R - Markdown avoiding package loading messages
...=FALSE to exclude everything in a chunk.
```{r include=FALSE}
source("C:/Rscripts/source.R")
```
If you only want to suppress messages, use message=FALSE instead:
```{r message=FALSE}
source("C:/Rscripts/source.R")
```
...
Renaming or copying files and folder using NERDTree on Vim. Is it possible?
... simulate the "right click" menus
that most file explorers have. The
script comes with two default menu
plugins: exec_menuitem.vim and
fs_menu.vim. fs_menu.vim adds some
basic filesystem operations to the
menu for
creating/deleting/moving/copying files
and dirs. exec_menuitem.vim p...
Factors in R: more than an annoyance?
...
What a snarky title!
I believe many estimation functions allow you to use factors to easily define dummy variables... but I don't use them for that.
I use them when I have very large character vectors with few unique observations. This ...
How do you create a dropdownlist from an enum in ASP.NET MVC?
...(typeof (DescriptionAttribute), true).FirstOrDefault()
let title = attribute == null ? item.ToString() : ((DescriptionAttribute) attribute).Description
select new SelectListItem
{
Value = item.ToString(),
...
Git, see a list of comments of my last N commits
...g. git log -5. If you're limiting the number of commits to output within a script, you should be kind to others and use the long option, e.g. git log --max-count=5.
– Dennis
Apr 3 '14 at 18:21
...
Redis cache vs using memory directly
..., various item eviction policies, blocking queues, pub/sub, atomicity, Lua scripting, etc ...
Redis can replicate its activity with a master/slave mechanism in order to implement high-availability.
Basically, if you need your application to scale on several nodes sharing the same data, then someth...
How to generate random SHA1 hash to use as ID in node.js?
...ng that has a lot more outputs? Like a timestamp with milliseconds? Or JavaScript's Math.random? Or even a combination of those two?!
Let's compute just how many unique ids we would get ...
The uniqueness of a timestamp with milliseconds
When using (new Date()).valueOf().toString(), you're gett...
Getting pids from ps -ef |grep keyword
...
Had to use the [k] trick on pgrep -f. My script was running in a subshell so I think it was picking up its parent command (hard to know for sure - the pid it returned was gone when the command was done executing!)
– ArtOfWarfare
...
What is the correct way to represent null XML elements?
...
If in a document publication app you want the date on the title page to default to the current date if the element has no content, omitting the date element entirely is not much help, since the app will have no idea where on the title page you want the date to appear. (If the omitt...
What does @: (at symbol colon) mean in a Makefile?
...conditions come up false and nothing gets done.
For example (from Linux's scripts/Makefile.clean):
__clean: $(subdir-ymn)
ifneq ($(strip $(__clean-files)),)
+$(call cmd,clean)
endif
ifneq ($(strip $(__clean-dirs)),)
+$(call cmd,cleandir)
endif
ifneq ($(strip $(clean-rule)),)
+$(clean-r...