大约有 47,000 项符合查询结果(耗时:0.1007秒) [XML]
Multiple file extensions in OpenFileDialog
...te groups so JPG are *.jpg and *.jpeg, TIFF are *.tif and *.tiff and also 'All graphic types'? How can I do that?
3 Answers...
Omit rows containing specific column of NA
...# 2 2 10 33
EDIT: Only return rows with no NAs
If you want to eliminate all rows with at least one NA in any column, just use the complete.cases function straight up:
DF[complete.cases(DF), ]
# x y z
# 2 2 10 33
Or if completeFun is already ingrained in your workflow ;)
completeFun(DF, na...
Should a “static final Logger” be declared in UPPER-CASE?
...aph 3.3 Field Naming
Names of fields being used as constants should be all upper-case, with underscores separating words. The following are considered to be constants:
All static final primitive types (Remember that all interface fields are inherently static final).
All static final ob...
Using Version Control for Home Development?
...rk methodology associated with using source control prepares you professionally.
Storage efficiency. Current source control systems store revisions as a delta difference to the previous revision. This means that it is more disk efficient as the entire file is not stored but only the differences.
You...
Why should I capitalize my SQL keywords? [duplicate]
Simple question. I personally find a string of lowercase characters to be more readable than a string of uppercase characters. Is some old/popular flavor of SQL case-sensitive or something?
...
Are HTTP headers case-sensitive?
...case-sensitive.)
If you trust the major browsers to abide by this, you're all set.
BTW, unlike most of HTTP, methods (verbs) are case sensitive:
5.1.1 Method
The Method token indicates the
method to be performed on the
resource identified by the
Request-URI. The method is
case-sens...
Using git, how do I ignore a file in one branch but have it committed in another branch?
...h "public_viewing"]
excludesfile = +info/exclude_from_public_viewing
Now all the global ignore stuff is in the info/exclude file and the branch specific is in the info/exclude_from_public_viewing
Hope that helps!
http://cogniton-mind.tumblr.com/post/1423976659/howto-gitignore-for-different-branc...
Command to collapse all sections of code?
In Visual Studio is there a command to collapse/expand all the sections of code in a file?
20 Answers
...
How do I hide .class files from the Open Resource dialog in Eclipse?
I won't want to have edit any working sets. I just want a way to, across all workspaces and projects, prevent .class files from ever showing in the Open Resource Dialog. Is there a way to do this?
...
Jar Mismatch Found 2 versions of android-support-v4.jar in the dependency list
....
I've been playing with the build path to no success.
Step #1: Undo all that. If you are messing with the build path, on R16 or higher version of the ADT plugin for Eclipse, you're doing it wrong.
Step #2: Pick one of those two versions of the JAR, or pick the one from the "extras" area of y...
