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Sending files using POST with HttpURLConnection
...rs recommend to use the HttpURLConnection class, I was wondering if anyone can provide me with a good example on how to send a bitmap "file" (actually an in-memory stream) via POST to an Apache HTTP server. I'm not interested in cookies or authentication or anything complicated, but I just want ...
How do I modify fields inside the new PostgreSQL JSON datatype?
...e are some jsonb manipulation functionality within PostgreSQL itself (but none for json; casts are required to manipulate json values).
Merging 2 (or more) JSON objects (or concatenating arrays):
SELECT jsonb '{"a":1}' || jsonb '{"b":2}', -- will yield jsonb '{"a":1,"b":2}'
jsonb '["a",1]' ||...
How to remove/ignore :hover css style on touch devices
...lick/tap because then it might stick until the element loses focus. To be honest, I don't know why touch devices feel the need to trigger :hover in first place - but this is reality, so this problem is reality as well.
...
How to filter SQL results in a has-many-through relation
...till wasn't much to separate the different approaches, IMO. Of course, the ones based on relational division could target a base table, giving them the advantage of 'extensibility'.
– onedaywhen
Oct 21 '11 at 7:55
...
How to check whether a pandas DataFrame is empty?
...I follow to avoid using a try-except clause -
check if variable is not None
then check if its a dataframe and
make sure its not empty
Here, DATA is the suspect variable -
DATA is not None and isinstance(DATA, pd.DataFrame) and not DATA.empty
...
What is the difference between Serializable and Externalizable in Java?
...dern JVM.
Also, the built-in Java serialization mechanism isn't the only one, you can get third-party replacements, such as JBoss Serialization, which is considerably quicker, and is a drop-in replacement for the default.
A big downside of Externalizable is that you have to maintain this logic yo...
Private virtual method in C++
...
Confusion of experts, however, remains a concern. None of the four C++ professionals sitting next to me were aware of private virtuals.
– Newtonx
Apr 20 '17 at 22:13
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Same-named attributes in attrs.xml for custom view
...had no luck. So I experiment and go a way to do it. Hope it might help someone looking for the same problem.
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- parent styleable -->
<declare-styleable name="MyView">
<attr name="myattr1" format=...
In Visual Studio C++, what are the memory allocation representations?
...cial version--0xCC with no additional byte--because an opcode must be only one byte in order to function as a reliable 'fill byte' for unused memory.
The point here is to allow for graceful recovery if the processor mistakenly jumps into memory that does not contain any intended instructions. Multi...
How to print a number with commas as thousands separators in JavaScript
...mportant;
}
The regex uses 2 lookahead assertions:
a positive one to look for any point in the string that has a multiple of 3 digits in a row after it,
a negative assertion to make sure that point only has exactly a multiple of 3 digits. The replacement expression puts a comma there.
...