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Any idea why I need to cast an integer literal to (int) here?
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The compiler tries to subtract 128 from (Integer) instead of casting -128 to Integer. Add () to fix it
Integer i3 = (Integer) -128; // doesn't compile
Integer i3 = (Integer) (-128); // compiles
According to BoltClock in the comments the cast to int works a...
Uncaught SyntaxError: Unexpected token with JSON.parse
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products is an object. (creating from an object literal)
JSON.parse() is used to convert a string containing JSON notation into a Javascript object.
Your code turns the object into a string (by calling .toString()) in order to try to parse it as JSON text....
Named colors in matplotlib
..., but I find it a bit difficult to get an overview of the available colors from the posted image. I prefer the colors to be grouped with similar colors, so I slightly tweaked the matplotlib answer that was mentioned in a comment above to get a color list sorted in columns. The order is not identical...
Java Multiple Inheritance
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and also
public class Pegasus implements Avialae, Equidae {}
Adding from the comments:
In order to reduce duplicate code, you could create an abstract class that contains most of the common code of the animals you want to implement.
public abstract class AbstractHorse implements Equidae {}
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How to JSON serialize sets?
...y to recover regular lists; if you convert sets to a dictionary using dict.fromkeys(s) then you lose the ability to recover dictionaries).
A more sophisticated solution is to build-out a custom type that can coexist with other native JSON types. This lets you store nested structures that include l...
How do I reload .bashrc without logging out and back in?
...u're just interested in PATH, you could do "unset PATH" and reconstruct it from scratch, but probably easier/safer is to do "PATH=/bin:/usr/bin" before sourcing your .bashrc. How the PATH variable is built up on login is actually reasonably complex, involving input at the very least from login (see ...
How does PHP 'foreach' actually work?
...$outerArr);
Here, $arr will be duplicated to prevent IAP changes on $arr from leaking to $outerArr. In terms of the conditions above, the array is not a reference (is_ref=0) and is used in two places (refcount=2). This requirement is unfortunate and an artifact of the suboptimal implementation (th...
Reading my own Jar's Manifest
...nd the URL for your class first. If it's a JAR, then you load the manifest from there. For example,
Class clazz = MyClass.class;
String className = clazz.getSimpleName() + ".class";
String classPath = clazz.getResource(className).toString();
if (!classPath.startsWith("jar")) {
// Class not from J...
How to execute file I'm editing in Vi(m)
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This facility is available for 'make' of project from vim (gives vim the IDE like capability). Brian Carper's solution (:let f=expand("%")|vnew|execute '.!ruby "' . f . '"') though looks cryptic, works exactly as asked by author of the question.
– Ajay...
Why is the console window closing immediately once displayed my output?
...'s finished. When console applications have completed executing and return from their main method, the associated console window automatically closes. This is expected behavior.
If you want to keep it open for debugging purposes, you'll need to instruct the computer to wait for a key press before e...