大约有 7,120 项符合查询结果（耗时：0.0310秒） [XML]
Using R to download zipped data file, extract, and import data
...
I used CRAN package "downloader" found at http://cran.r-project.org/web/packages/downloader/index.html . Much easier.
download(url, dest="dataset.zip", mode="wb")
unzip ("dataset.zip", exdir = "./")
share
...
How to remove the default arrow icon from a dropdown list (select element)?
...SELECTelement and adjust the margin-top to suit your needs.
select {
-webkit-appearance: none;
-moz-appearance: none;
text-indent: 1px;
text-overflow: '';
}
Hope this helps :)
share
|
...
What is a predicate in c#? [duplicate]
... want something specific.
I've recently run into them in using 3rd party web controls (like treeviews) so when I need to find a node within a tree, I use the .Find() method and pass a predicate that will return the specific node I'm looking for. In your example, if 'a' mod 2 is 0, the delegate wil...
Deserializing a JSON into a JavaScript object
...ce is trusted and competent.
It is much safer to use a JSON parser.
In web applications over XMLHttpRequest,
communication is permitted only to the same origin that
provide that page, so it is trusted.
But it might not be competent.
If the server is not rigorous in its JSON encoding,
o...
Is there a way to use shell_exec without waiting for the command to complete?
...
If it's off of a web page, I recommend generating a signal of some kind (dropping a file in a directory, perhaps) and having a cron job pick up the work that needs to be done. Otherwise, we're likely to get into the territory of using pcntl_...
What should main() return in C and C++?
....2.2.1).
Microsoft C
The Microsoft VS 2010 compiler is interesting. The web site says:
The declaration syntax for main is
int main();
or, optionally,
int main(int argc, char *argv[], char *envp[]);
Alternatively, the main and wmain functions can be declared as returning void (n...
indexOf method in an object array?
...nd you can use a Polyfill for IE8, 7, 6: developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
– Johann Echavarria
Sep 30 '14 at 15:02
1
...
input type=“text” vs input type=“search” in HTML5
...his isn't a problem. The spec doesn't require it to do
anything special. WebKit browsers do treat it a bit differently
though, primarily with styling.
A search input in WebKit by default has an inset border, rounded
corners, and strict typographic control.
Also,
This isn't documente...
How do I create directory if none exists using File class in Ruby?
...ls' dependency gem rmagick prevented my Rails app from deploying on Amazon Web Services since rmagick depends on the package libmagickwand-dev (Ubuntu) / imagemagick (OSX) to work properly.
share
|
...
How to override the properties of a CSS class using another CSS class
... you can just use traditional paper/pencil.
For further reading try MDN Web Docs.
All the best for not using !important.
share
|
improve this answer
|
follow
...