大约有 20,000 项符合查询结果（耗时：0.0311秒） [XML]
What are the First and Second Level caches in Hibernate?
...nately the link does not exist now. But I found its content on its archive webpage: web.archive.org/web/20081207044228/http://…
– Golu
Mar 15 '19 at 18:26
...
Should we use Nexus or Artifactory for a Maven Repo?
...
Dead simple install (and since 1.2, dead simple upgrade, too)
Very good web UI
Easy to maintain, almost no administrative overhead
Provides you with RSS feeds of recently installed, broken artifacts and errors
It can group several repositories so you can mirror several sources but need only one o...
Rails 4 multiple image or file upload using carrierwave
... array of images:
rails generate migration AddPicturesToProducts pictures:json
Run the migration
bundle exec rake db:migrate
Add pictures to model Product
app/models/product.rb
class Product < ActiveRecord::Base
validates :name, presence: true
mount_uploaders :pictures, PictureUploader
...
How many database indexes is too many?
...(although my question applies equally well to other databases). We have a web interface which allows users to search on almost any possible combination of fields.
...
What does “use strict” do in JavaScript, and what is the reasoning behind it?
...ipt Strict Mode might interest you: John Resig - ECMAScript 5 Strict Mode, JSON, and More
To quote some interesting parts:
Strict Mode is a new feature in ECMAScript 5 that allows you to place a program, or a function, in a "strict" operating context. This strict context prevents certain action...
deciding among subprocess, multiprocessing, and thread in Python?
...ngle instance for co-ordinating your workers and marshaling data (pickled, JSON, BSON, or YAML) among them.
Of course as you start to build a larger scale and more sophisticated solution around Redis you are re-implementing many of the features that have already been solved using, Celery, Apache Spa...
How to determine the memory footprint (size) of a variable?
...n("/tmp/profile.heap", "w"));
Then open your terminal and launch:
pprof --web /tmp/profile.heap
pprof will create a new window in your existing browser session with something like shown below:
Xhprof + Xhgui (the best in my opinion to profile both cpu and memory)
With Xhprof and Xhgui you can pro...
Save icon: Still a floppy disk? [closed]
...ve used the floppy icon, or a big button that just says "Save" on it in my web applications. For the time being we're stuck with it for many cases, but it gets more and more ridiculous as floppy drives die out. But then, we also say we "dial" phones, when dial-interface phones have not been in popul...
How to fix the flickering in User controls
...ired WS_EX_COMPOSITED/WS_CLIPCHILDREN style. I found a hack here (https://web.archive.org/web/20161026205944/http://www.angryhacker.com/blog/archive/2010/07/21/how-to-get-rid-of-flicker-on-windows-forms-applications.aspx) and it works great. Thanks AngryHacker!
I put the TurnOnFormLevelDoubleBuff...
Why is Cache-Control attribute sent in request header (client to server)?
...
Cache-Control: no-cache is generally used in a request header (sent from web browser to server) to force validation of the resource in the intermediate proxies.
If the client doesn't send this request to the server, intermediate proxies will return a copy of the content if it is fresh (has not exp...