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Should I declare Jackson's ObjectMapper as a static field?
...if you lock yourself into a static final pattern, nothing short of tearing down the classloader will let you re-initialize it.
In the case of ObjectMapper its fine, but in general it is bad practice and there is no advantage over using a singleton pattern or inversion-of-control to manage your long...
Could you explain STA and MTA?
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It's all down to how calls to objects are handled, and how much protection they need. COM objects can ask the runtime to protect them against being called by multiple threads at the same time; those that don't can potentially be calle...
JUnit test for System.out.println()
...CaptureTest. The captureOutput method does the work of setting and tearing down the output streams. When the implementation of CaptureOutput's test method is called, it has access to the output generate for the test block.
Source for TestHelper:
public class TestHelper {
public static void ca...
Placing border inside of div and not on its edge
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One downside is that some browsers fail to print box-shadow correctly and always print it as #000. This COULD be a show stopper if you need to be able to print the page.
– Rob Fox
Jul 31 '14...
Maximum number of records in a MySQL database table
...s of entries? (which would probably just make your select statements melt down long before then)
– Kzqai
Apr 26 '10 at 19:35
2
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Microsoft.WebApplication.targets was not found, on the build server. What's your solution?
... cant we just install MSBuild tools instead of this? microsoft.com/en-us/download/confirmation.aspx?id=40760
– user20358
Dec 8 '14 at 17:05
1
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Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields?
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Like the rest, I went with callables too. But they have one downside: by default, you can't order on them. Fortunately, there is a solution for that:
Django >= 1.8
def author(self, obj):
return obj.book.author
author.admin_order_field = 'book__author'
Django < 1.8
def ...
How can I lookup a Java enum from its String value?
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@Adam Gent: There's a link down below to the JLS where this exact construct is posed as an example. It says that static initialization occurs from top to bottom: docs.oracle.com/javase/specs/jls/se7/html/jls-8.html#d5e12267
– Sele...
Is it possible to listen to a “style change” event?
... You could use getComputedStyle with setInterval but that would slow down your website a lot.
– fregante
Apr 18 '16 at 8:01
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Mockito - difference between doReturn() and when()
...ning into YODA style coding of method calls. The thing later comes written down first that is. Most people read left to right; so you now have to constantly remember to reverse the return-when logic in your head.
– GhostCat
Feb 24 '17 at 13:40
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