大约有 47,000 项符合查询结果（耗时：0.0508秒） [XML]
Factors in R: more than an annoyance?
...ns that are factors using gdata
require(gdata)
drop.levels(dataframe)
I know that it is straightforward to recode levels of a factor and to rejig the labels and there are also wonderful ways to reorder the levels. My brain just cannot remember them and I have to relearn it every time I use it. Rec...
Amazon S3 - HTTPS/SSL - Is it possible? [closed]
...AME furniture-retailcatalog-us.s3.amazonaws.com.
Hope that helps. Let us know if you have any other questions.
Amazon Web Services
Unfortunately your "friendly" CNAME will cause host name mismatch when validating the certificate, therefore you cannot really use it for a secure connection. A big mi...
Is it possible to set UIView border properties from interface builder?
...ou can set some properties of a view's layer through interface builder. I know that I can set a layer's borderWidth and cornerRadius through xcode. borderColor doesn't work, probably because the layer wants a CGColor instead of a UIColor.
You might have to use Strings instead of numbers, but it wor...
filtering NSArray into a new NSArray in Objective-C
...ontains[c] 's'"];
[array filteredArrayUsingPredicate:sPredicate];
// array now contains { @"Chris", @"Melissa" }
share
|
improve this answer
|
follow
|
...
Use tab to indent in textarea
I have a simple html textarea on my side. Right now if you click tab in it, it goes to the next field. I would like to make the tab button indent a few spaces instead. How can I do this? Thanks.
...
How to check whether an object is a date?
...
Out of interest do you know the reason for this failing when passing across frame boundaries?
– Simon Lieschke
Apr 12 '10 at 6:03
...
Node.js: printing to console without a trailing newline?
...
Genius. Didn't know you could do this.
– Joshua Pinter
Jun 29 at 22:29
add a comment
|
...
API to automatically upload apk to Google Play? [closed]
...
Does anyone know if the restriction of updating only preexistent apps still apply?
– Ricardo Pedroni
Jan 27 '15 at 19:49
...
Iterate a list as pair (current, next) in Python
...thon looking at the "current" element and the "next" element. I have, till now, done so with code like:
10 Answers
...
Max or Default?
...
Although DefaultIfEmpty is now implemented in LINQ to SQL, this answer remains better IMO, as using DefaultIfEmpty results in a SQL statement 'SELECT MyCounter' that returns a row for every value being summed, whereas this answer results in MAX(MyCount...