大约有 40,000 项符合查询结果（耗时：0.0603秒） [XML]
How to view the SQL queries issued by JPA?
...
In order to view all the SQL and parameters in OpenJPA, put these two parameters in the persistence.xml:
<property name="openjpa.Log" value="DefaultLevel=WARN, Runtime=INFO, Tool=INFO, SQL=TRACE"/>
<property name="open...
Rails :dependent => :destroy VS :dependent => :delete_all
...e that these are implemented as callbacks, and Rails executes callbacks in order. Therefore, other similar callbacks may affect the :dependent behavior, and the :dependent behavior may affect other callbacks.
:destroy causes all the associated objects to also be destroyed.
:delete_all causes all t...
Remove empty elements from an array in Javascript
...ll return you a new array with the elements that pass the criteria of the callback function you provide to it.
For example, if you want to remove null or undefined values:
var array = [0, 1, null, 2, "", 3, undefined, 3,,,,,, 4,, 4,, 5,, 6,,,,];
var filtered = array.filter(function (el) {
...
How to do a https request with bad certificate?
Say I want to get https://golang.org programatically. Currently golang.org (ssl) has a bad certificate which is issued to *.appspot.com So when I run this:
...
Get all files that have been modified in git branch
...is interesting, more wordy. It provides output fro each commit, in reverse order. git-whatchanged - Show logs with difference each commit introduces git-scm.com/docs/git-whatchanged
– nealmcb
Jul 27 '17 at 12:14
...
HTML: How to create a DIV with only vertical scroll-bars for long paragraphs?
...
For any case set overflow-x to hidden and I prefer to set max-height in order to limit the expansion of the height of the div. Your code should looks like this:
overflow-y: scroll;
overflow-x: hidden;
max-height: 450px;
...
Android: failed to convert @drawable/picture into a drawable
In my drawable folder I have a few images and they all reference perfect, but when I try and add any more images with the exact same size in the same folder, and try to reference it, is flags up an error "Failed to convert @drawable/picture into a drawable" . I have tried the same image with a diff...
How to convert IPython notebooks to PDF and HTML?
...
If you have LaTeX installed you can download as PDF directly from Jupyter notebook with File -> Download as -> PDF via LaTeX (.pdf). Otherwise follow these two steps.
For HTML output, you should now use Jupyter in place of IPython and sele...
How to replace local branch with remote branch entirely in Git?
...contents of master. So if you're on e.g. a feature-branch, it will replace all its commits with master, so make sure you've checked out the branch you're replacing first.
– Zoltán
Jul 15 '16 at 8:29
...
What is the purpose of the “role” attribute in HTML?
... also see it as being useful for embedded browsers and screen scrapers. In order to be useful to the unusual HTML client, the attribute needs to be set to one of the roles from the spec I linked. If you make up your own, this 'future' functionality can't work - a comment would be better.
Practical...