大约有 47,000 项符合查询结果（耗时：0.0386秒） [XML]
Learning Ruby on Rails
As it stands now, I'm a Java and C# developer. The more and more I look at Ruby on Rails, the more I really want to learn it.
...
How to do date/time comparison
... time.LoadLocation("UTC")
// setup a start and end time
createdAt := time.Now().In(loc).Add(1 * time.Hour)
expiresAt := time.Now().In(loc).Add(4 * time.Hour)
// get the diff
diff := expiresAt.Sub(createdAt)
fmt.Printf("Lifespan is %+v", diff)
The program outputs:
Lifespan is 3h0m0s
http://pla...
Using Laravel Homestead: 'no input file specified'
...ou need to have your homestead.yaml file settings correct. If you want to know how its done follow Jeffery Way tutorial on homestead 2.0 https://laracasts.com/lessons/say-hello-to-laravel-homestead-two.
Now to fix Input not specified issue you need to ssh into homestead box and type
serve domain...
How to make phpstorm display line numbers by default?
...
Just now found where is it on Windows. Its View -> Active Editor -> Show Line Numbers (changes only for current document) and File -> Settings -> Editor -> Appearance -> Show Line Numbers (for all documents)
For...
Weighted random numbers
...or is more than a few dozen items long (basically, you have to profile to know if this helps or hinders), then there is an optimisation:
By storing the cumulative weight sum in each item you can use a binary search to pick the item corresponding to the pick weight.
If you do not know the number ...
Using Python String Formatting with Lists
...
The link is now dead.
– M. K. Hunter
Aug 23 '18 at 20:40
add a comment
|
...
SVN: Folder already under version control but not comitting?
...y. Remember to delete all .svn hidden directories from the copied folder.
Now update your project, clean-up and commit what has left. Now move your folder back to working directory, add it and commit. Most of the time this workaround works, it seems that basically SVN got confused...
Update: quoti...
filter for complete cases in data.frame using dplyr (case-wise deletion)
... are a lot of variables and b) impossible when the variable names are not known (e.g. in a function that processes any data.frame).
...
How to load assemblies in PowerShell?
...-us/library/12xc5368(v=vs.110).aspx See the note at the top - This API is now obsolete. Of course, that doesn't stop people from using it.
– Keith Hill
Nov 14 '14 at 15:30
2
...
configure: error: C compiler cannot create executables
...
Command line Tools packages ars now available at: developer.apple.com/downloads
– Danny D'Amours
Sep 11 '14 at 23:56
3
...