大约有 47,000 项符合查询结果(耗时:0.0649秒) [XML]

https://stackoverflow.com/ques... 

How do you push a Git tag to a branch using a refspec?

I want to force push, for example, my tag 1.0.0 to my remote master branch. 4 Answers ...
https://stackoverflow.com/ques... 

Is R's apply family more than syntactic sugar?

... n < 2 ) n + else fibo(n-1) + fibo(n-2) + } > system.time(for(i in 0:26) fibo(i)) user system elapsed 7.48 0.00 7.52 > system.time(sapply(0:26, fibo)) user system elapsed 7.50 0.00 7.54 > system.time(lapply(0:26, fibo)) user system elapsed 7.48 ...
https://stackoverflow.com/ques... 

How to decide font color in white or black depending on background color?

...overall intensity of the color and choose the corresponding text. if (red*0.299 + green*0.587 + blue*0.114) > 186 use #000000 else use #ffffff The threshold of 186 is based on theory, but can be adjusted to taste. Based on the comments below a threshold of 150 may work better for you. Edit: T...
https://stackoverflow.com/ques... 

Is there a way to detect if an image is blurry?

... answered Oct 14 '11 at 10:01 Simon BergotSimon Bergot 9,08866 gold badges3131 silver badges5353 bronze badges ...
https://stackoverflow.com/ques... 

Pandas groupby: How to get a union of strings

..._csv(StringIO(data),sep='\s+') In [5]: df Out[5]: A B C 0 1 0.749065 This 1 2 0.301084 is 2 3 0.463468 a 3 4 0.643961 random 4 1 0.866521 string 5 2 0.120737 ! In [6]: df.dtypes Out[6]: A int64 B float64 C object dtype: object When...
https://stackoverflow.com/ques... 

How can I find the number of days between two Date objects in Ruby?

... 10 Answers 10 Active ...
https://stackoverflow.com/ques... 

How do you compare two version Strings in Java?

... answered Oct 13 '08 at 17:57 gizmogizmo 11.5k55 gold badges4141 silver badges5959 bronze badges ...
https://stackoverflow.com/ques... 

Converting strings to floats in a DataFrame

...) or pd.to_numeric as described in other answers. This is available in 0.11. Forces conversion (or set's to nan) This will work even when astype will fail; its also series by series so it won't convert say a complete string column In [10]: df = DataFrame(dict(A = Series(['1.0','1']), B = Series...
https://stackoverflow.com/ques... 

How to set versionName in APK filename using gradle?

...Gradle Plugin android { compileSdkVersion 22 buildToolsVersion "22.0.1" defaultConfig { applicationId "com.company.app" minSdkVersion 13 targetSdkVersion 21 versionCode 14 // increment with every release versionName '1.4.8' // change with e...
https://stackoverflow.com/ques... 

Sleep until a specific time/date

...bash, do the following: current_epoch=$(date +%s) target_epoch=$(date -d '01/01/2010 12:00' +%s) sleep_seconds=$(( $target_epoch - $current_epoch )) sleep $sleep_seconds To add precision down to nanoseconds (effectively more around milliseconds) use e.g. this syntax: current_epoch=$(date +%s.%...