大约有 40,700 项符合查询结果（耗时：0.0431秒） [XML]
Is it pythonic to import inside functions?
...of the file, that way you can tell at a glance how complicated your module is by what it needs to import.
If I'm adding new code to an existing file I'll usually do the import where it's needed and then if the code stays I'll make things more permanent by moving the import line to the top of the fi...
What is the difference between Hibernate and Spring Data JPA
...
Hibernate is a JPA implementation, while Spring Data JPA is a JPA data access abstraction. Spring Data JPA cannot work without a JPA provider.
Spring Data offers a solution to the DDD Repository pattern or the legacy GenericDao custom...
Why can templates only be implemented in the header file?
...
Caveat: It is not necessary to put the implementation in the header file, see the alternative solution at the end of this answer.
Anyway, the reason your code is failing is that, when instantiating a template, the compiler creates a ne...
Is there a performance gain in using single quotes vs double quotes in ruby?
...
$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.0.0]
$ cat benchmark_quotes.rb
# As of Ruby 1.9 Benchmark must be required
require 'benchmark'
n = 1000000
Benchmark.bm(15) do |x|
x.report("assign single") { n.times do; c = 'a string'; end}...
Storing time-series data, relational or non?
...g a system which polls devices for data on varying metrics such as CPU utilisation, disk utilisation, temperature etc. at (probably) 5 minute intervals using SNMP. The ultimate goal is to provide visualisations to a user of the system in the form of time-series graphs.
...
CSS image resize percentage of itself?
...
I have 2 methods for you.
Method 1. demo on jsFiddle
This method resize image only visual not it actual dimensions in DOM, and visual state after resize centered in middle of original size.
html:
<img class="fake" src="example.png" />
css:
img {
-webkit-transform: scale(...
What does .SD stand for in data.table in R
... I do not really know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
...
What is the difference between CMD and ENTRYPOINT in a Dockerfile?
...ds that look similar to me: CMD and ENTRYPOINT . But I guess that there is a (subtle?) difference between them - otherwise it would not make any sense to have two commands for the very same thing.
...
How do I see if Wi-Fi is connected on Android?
...have Wi-Fi connected. However, I can only seem to be able to tell if Wi-Fi is enabled, but they could still have a 3G connection.
...
Is it possible to change the package name of an Android app on Google Play?
I would like to know whether it is technically possible, not whether it is easy or not, to change the actual package name of an Android app that is on Google Play. What I mean by package name is the name that will show up in the URL. Please, can anyone tell me why this is / is not possible?
Thanks!
...