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Difference between var_dump,var_export & print_r
...bugging purposes, too, but does not include the member's type. It's a good idea to use if you know the types of elements in your array, but can be misleading otherwise. print_r by default prints the result, but allows returning as string instead by using the optional $return parameter.
Array (
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JSR-303 @Valid annotation not working for list of child objects
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You need to decorate addresses member of UserAddressesForm with @Valid annotation. See section 3.1.3 and 3.5.1 of JSR 303: Bean Validation. As I explained in my answer to the question Is there a standard way to enable JSR 303 Bean Validation using annotated method, this is the real use of @Va...
How to open the Chrome Developer Tools in a new window?
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As of some point mid 2016 you only have to click the vertical ellipses for the docking options to appear, you no longer have to click and hold.
– Chris B
Sep 15 '16 at 8:52
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JPA or JDBC, how are they different?
...nderlying technologies behind most Java database access (including JPA providers).
One of the issues with traditional JDBC apps is that you can often have some crappy code where lots of mapping between data sets and objects occur, logic is mixed in with SQL, etc.
JPA is a standard for Object Relat...
How can I show the name of branches in `git log`?
...swered Jun 15 '18 at 11:05
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What's the difference between and
...;?> is reifiable while <? extend object> is not. The reason they did this is to make it easier to distinguish reifiable type. Anything that looks like <? extends something>,<T>,<Integer> are nonreifiable.
For example, this code would work
List aList = new ArrayList&...
JSON.parse vs. eval()
My Spider Sense warns me that using eval() to parse incoming JSON is a bad idea. I'm just wondering if JSON.parse() - which I assume is a part of JavaScript and not a browser-specific function - is more secure.
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Copying files using rsync from remote server to local machine
...s. The command given by Johnnysweb would create a directory called copy inside /path/to/local/storage. Like so /path/to/local/storage/copy. If that's what you want great. However a more common scenario is you want to copy the contents of the remote directory into a directory in your local. Then you ...
Platform independent size_t Format specifiers in c?
...omething but still this answer is just wrong. Ah, I think I understand the idea here in 'portable'. It must be saying that it works for both 32-bit and 64-bit. But of course it would.
– Pryftan
Dec 3 '19 at 15:00
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Difference between setUp() and setUpBeforeClass()
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Finally, use the "AfterClass" annotated method to clean up any setup you did in the "BeforeClass" annotated method (unless their self destruction is good enough).
"Before" & "After" are for unit test specific initialization. I typically use these methods to initialize / re-initialize the mocks...