大约有 48,000 项符合查询结果（耗时：0.0317秒） [XML]
Adding a column to a data.frame
...1, 1 + cumsum(nonpos))
> classes
[1] 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3
Now, we can attach it back onto our data frame with cbind (by using the class= syntax, we can give the column the class heading):
> data_w_classes <- cbind(data, class=classes)
And data_w_classes now contains the re...
How remove word wrap from textarea?
...ut you can set wrap="soft" to explicitly disable wrap:
<textarea name="nowrap" cols="30" rows="3" wrap="soft"></textarea>
EDIT: The "wrap" attribute is not officially supported. I got it from the german SELFHTML page (an english source is here) that says IE 4.0 and Netscape 2.0 suppor...
how to solve “ruby installation is missing psych” error?
...ven though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up:
...
What's the best way to learn LISP? [closed]
I have been programming in Python, PHP, Java and C for a couple or years now, and I just finished reading Hackers and Painters, so I would love to give LISP a try!
...
Is it feasible to compile Python to machine code?
...
shedskin has had no work done on it in about two years now. :(
– Perkins
Aug 27 '18 at 17:58
add a comment
|
...
How can I produce an effect similar to the iOS 7 blur view?
... API for this, and said that this approach was the "least evil" option for now and is fairly safe as written. Specifically he said do not try to do any animations of the frame or transform of this toolbar/view or anything like that, or bad things will happen. He also strongly suggested to file Radar...
Visual Studio loading symbols
I'm working on a ColdFusion project for a while now, and Visual Studio started to behave strange for me at least.
16 Answ...
Why are only final variables accessible in anonymous class?
...r Java 7, keep in mind that with Java 8, closures have been introduced and now it is indeed possible to access a non-final field of a class from its inner class.
– Mathias Bader
Oct 24 '14 at 14:41
...
Chrome ignores autocomplete=“off”
...
UPDATE
It seems now Chrome ignores the style="display: none;" or style="visibility: hidden; attributes.
You can change it to something like:
<input style="opacity: 0;position: absolute;">
<input type="password" style="opacity: 0;p...
Mercurial move changes to a new branch
...eans, revision 0 is the base on which you started to work on your feature. Now you want to have revisions 1-2 on a named branch, let's say my-feature. Update to revision 0 and create that branch:
$ hg up 0
$ hg branch my-feature
$ hg ci -m "start new branch my-feature"
The history now looks like ...