大约有 40,000 项符合查询结果（耗时：0.0573秒） [XML]
Summarizing multiple columns with dplyr? [duplicate]
...
I mean, the behavior like in select would be great: summarize(df, a:c, d=paste(d, collaspe =',' ) . Just want to put more original columns in for reference
– biocyberman
Aug 8 '15 at 17:28
...
Specifying and saving a figure with exact size in pixels
...-- it seems that the DPI saved is always 0.02 pixels/inch smaller than the selected value, which will have a (small) effect on large image sizes. Some more discussion of this here.
share
|
improve t...
How does Spring Data JPA differ from Hibernate for large projects?
...ryCustom {
List<MyObject> findByName(String name);
@Query("select * from my_object where name = ?0 or middle_name = ?0")
List<MyObject> findByFirstNameOrMiddleName(String name);
}
MyObjectRepositoryCustom - repository methods that are more complex and cannot be handled wi...
What is a PDB file?
...want it to not be generated at all, go to your project's Build properties, select the Release configuration, click on "Advanced..." and under "Debug Info" pick "None".
share
|
improve this answer
...
IIS Express gives Access Denied error when debugging ASP.NET MVC
...I used Jason's answer but wanted to clarify how to get in to properties.
Select project in Solution Explorer
F4 to get to properties (different than the right click
properties)
Change Windows Authentication to Enabled
...
Xcode: What is a target and scheme in plain language?
...between running your app and your unit tests without needing to toggle the selected target.
share
|
improve this answer
|
follow
|
...
What are all the user accounts for IIS/ASP.NET and how do they differ?
...nymous Authentication entry:
Ensure that "Application pool identity" is selected:
When you come to apply file and folder permissions you grant the Application Pool identity whatever rights are required. For example if you are granting the application pool identity for the ASP.NET v4.0 pool per...
How to think in data stores instead of databases?
...e does not have LIKE Keyword) SQL which is GQL.
Data Insert/Update/Delete/Select
This where we all are interested in, as in RDMBS we require one query for Insert, Update, Delete and Select just like RDBMS, Datastore has put, delete, get(dont get too excited) because Datastore put or get in terms of...
How do you run a Python script as a service in Windows?
...d since I could pass options to an installed service, I could just as well select my Python executable and pass my script as an option.
I have not yet tried this solution, but I will do so right now and update this post along the process. I am also interested in using virtualenvs on Windows, so I m...
Blocks and yields in Ruby
...y:
days = ["monday", "tuesday", "wednesday", "thursday", "friday"]
# select those which start with 't'
days.select do | item |
item.match /^t/
end
=> ["tuesday", "thursday"]
Or, we can also provide a custom sort algorithm, for instance based on the string size:
days.sort do |x,...