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RESTful call in Java
...n.getInputStream() which returns you an InputStream. You will then have to convert your input stream to string and parse the string into it's representative object (e.g. XML, JSON, etc).
Alternatively, Apache HttpClient (version 4 is the latest). It's more stable and robust than java's default URLC...
How to toggle a boolean?
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If you don't mind the boolean being converted to a number (that is either 0 or 1), you can use the Bitwise XOR Assignment Operator. Like so:
bool ^= true; //- toggle value.
This is especially good if you use long, descriptive boolean names, EG:
var inDyn...
VIM Disable Automatic Newline At End Of File
... Doing this has the desired affect of no final line, but it also converts the file to unix line endings... (even on a windows box)... So I had done that before by switching into binary mode... but then the line endings don't show up write in notepad... everything is just one line.
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Is it possible to have empty RequestParam values use the defaultValue?
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You could change the @RequestParam type to an Integer and make it not required. This would allow your request to succeed, but it would then be null. You could explicitly set it to your default value in the controller method:
@RequestMapping(value = "/test", method = RequestMeth...
String is immutable. What exactly is the meaning? [duplicate]
...ith the fuss of immutability, let's just take a look into the String class and its functionality a little before coming to any conclusion.
This is how String works:
String str = "knowledge";
This, as usual, creates a string containing "knowledge" and assigns it a reference str. Simple enough? Le...
C# nullable string error
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System.String is a reference type and already "nullable".
Nullable<T> and the ? suffix are for value types such as Int32, Double, DateTime, etc.
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Combine multiple Collections into a single logical Collection?
...terate over all elements (ideally, read only).
I'm using guava collections and I wonder how I could use guava iterables/iterators to generate a logical view on the internal collections without making temporary copies.
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SQL JOIN - WHERE clause vs. ON clause
...ause adding a WHERE clause that references the right side of the join will convert the join to an INNER JOIN.
The exception is when you are looking for the records that are not in a particular table. You would add the reference to a unique identifier (that is not ever NULL) in the RIGHT JOIN table ...
Super-simple example of C# observer/observable with delegates
...re's an example:
using System;
class Observable
{
public event EventHandler SomethingHappened;
public void DoSomething() =>
SomethingHappened?.Invoke(this, EventArgs.Empty);
}
class Observer
{
public void HandleEvent(object sender, EventArgs args)
{
Console.Wri...
What is the native keyword in Java for?
... actual implementation doesn’t have to use JNI. Certain JRE methods are handled intrinsically by the JVM. In fact, it’s not even mandatory that the implementation is actually native code. It’s just “implemented in a language other than the Java programming language”.
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