大约有 43,000 项符合查询结果（耗时：0.0569秒） [XML]
Preferred method to store PHP arrays (json_encode vs serialize)
I need to store a multi-dimensional associative array of data in a flat file for caching purposes. I might occasionally come across the need to convert it to JSON for use in my web app but the vast majority of the time I will be using the array directly in PHP.
...
Spring vs EJB. Can Spring replace EJB? [closed]
Since Spring is able to use transactions just like EJB . For me, Spring is able to replace the requirement of using EJB. Can anyone tell me what are the extra advantages of using EJB?
...
Why seal a class?
I'd like to hear what is the motivation behind the bulk of sealed classes in the .Net framework. What is the benefit of sealing a class? I cannot fathom how not allowing inheritance can be useful and most likely not the only one fighting these classes.
...
MySQL Creating tables with Foreign Keys giving errno: 150
I am trying to create a table in MySQL with two foreign keys, which reference the primary keys in 2 other tables, but I am getting an errno: 150 error and it will not create the table.
...
Tablix: Repeat header rows on each page not working - Report Builder 3.0
...ach page but this does not work. I read somewhere that this is a known bug in Report Builder 3.0. Is this true? If not, is there something else that needs to be done?
...
I need to store postal codes in a database. How big should the column be?
I expect the column to be a VARCHAR2, in my Oracle Database.
8 Answers
8
...
Django template how to look up a dictionary value with a variable
The regular way to lookup a dictionary value in a Django template is {{ mydict.key1 }} , {{ mydict.key2 }} . What if the key is a loop variable? ie:
...
puts vs logger in rails rake tasks
In a rake task if I use puts command then I see the output on console. However I will not see that message in log file when app is deployed on production.
...
How to solve the “failed to lazily initialize a collection of role” Hibernate exception
...ee all Comments every time you retrieve a Topic then change your field mapping for comments to:
@OneToMany(fetch = FetchType.EAGER, mappedBy = "topic", cascade = CascadeType.ALL)
private Collection<Comment> comments = new LinkedHashSet<Comment>();
Collections are lazy-loaded by defaul...
Why use 'virtual' for class properties in Entity Framework model definitions?
In the following blog: http://weblogs.asp.net/scottgu/archive/2010/07/16/code-first-development-with-entity-framework-4.aspx
...