大约有 20,000 项符合查询结果（耗时：0.0390秒） [XML]
When to use EntityManager.find() vs EntityManager.getReference() with JPA
...
So before transaction commit, JPA provider will see stateChanged flag in order to update OR NOT person entity. If no rows is updated after update statement, JPA provider will throw EntityNotFoundException according to JPA specification.
regards,
...
Prefer composition over inheritance?
...ifference, it's easier to explain.
Procedural Code
An example of this is PHP without the use of classes (particularly before PHP5). All logic is encoded in a set of functions. You may include other files containing helper functions and so on and conduct your business logic by passing data around i...
VIM + JSLint?
...instructions updated for Nov. 2012. Assumes you have Homebrew installed in order to get Node.js, and that you've already installed Syntastic for Vim (I use https://github.com/carlhuda/janus which provides this automatically):
$ brew install node.js
$ npm install -g jshint
Then add '/usr/local/sha...
扒皮美女创业者：15分钟拿下薛蛮子 7家风投追捧 - 资讯 - 清泛网 - 专注C/C...
...拿的是自家的钱在创业，那是创业没多久，就要考虑盈利问题的，如果持续不赚钱，没有人会进行下去。但是互联网投资就不一样了，烧的是别人的钱，钱烧的越快，市场占有的越广，说明你越牛X.
不乏一些情况下，烧钱烧到...
Should I impose a maximum length on passwords?
... treat only the first 256/1024/2k/4k/(whatever) bytes as "significant", in order to avoid crunching on mammoth passwords.]
share
|
improve this answer
|
follow
...
Getting current device language in iOS?
... language to Japanese, my region will still be English (United States). In order to retrieve the currently selected language, you can do:
NSString * language = [[NSLocale preferredLanguages] firstObject];
This will return a two letter code for the currently selected language. "en" for English, "e...
Finding a branch point with Git?
...t.
So, I've created the following tree (letters assigned in chronological order), so I could test things out:
A - B - D - F - G <- "master" branch (at G)
\ \ /
C - E --' <- "topic" branch (still at E)
This looks a little different than yours, because I wanted to make...
Pagination in a REST web application
...ings are not first-class resource identifiers; they just clarification for ordering and grouping of the resource.
– S.Lott
Mar 2 '10 at 21:16
1
...
Get exception description and stack trace which caused an exception, all as a string
...
Let's create a decently complicated stacktrace, in order to demonstrate that we get the full stacktrace:
def raise_error():
raise RuntimeError('something bad happened!')
def do_something_that_might_error():
raise_error()
Logging the full stacktrace
A best practic...
angular.service vs angular.factory
...those variables/function to ‘service’. We’re simply creating them in order to either use or modify them later.
baseUrl is the base URL that the iTunes API requires
_artist is the artist we wish to lookup
_finalUrl is the final and fully built URL to which we’ll make the call to iTunes mak...