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difference between throw and throw new Exception()
...w ex; throws the original exception but resets the stack trace, destroying all stack trace information until your catch block.
NEVER write throw ex;
throw new Exception(ex.Message); is even worse. It creates a brand new Exception instance, losing the original stack trace of the exception, as well...
How do I comment on the Windows command line?
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Powershell
For powershell, use #:
PS C:\> echo foo # This is a comment
foo
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How to enter quotes in a Java string?
...g ROM = "Java Programming";
ROM = "\"" + ROM + "\"";
Of course, this actually replaces the original ROM, since Java Strings are immutable.
If you are wanting to do something like turn the variable name into a String, you can't do that in Java, AFAIK.
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What is the purpose of @SmallTest, @MediumTest, and @LargeTest annotations in Android?
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adb shell am instrument -w -e size [small|medium|large] com.android.foo/android.support.test.runner.AndroidJUnitRunner
You may also setup those params through gradle:
android {
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defaultConfig {
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testInstrumentationRunnerArgument 'size', '...
#pragma pack effect
... objects in a structure to. For example, if I have something like:
struct foo {
char a;
int b;
};
With a typical 32-bit machine, you'd normally "want" to have 3 bytes of padding between a and b so that b will land at a 4-byte boundary to maximize its access speed (and that's what will ty...
Get HTML Source of WebElement in Selenium WebDriver using Python
... Though innerHTML is not a DOM attribute, it is well supported by all major browsers (quirksmode.org/dom/w3c_html.html). It works also well for me.
– CuongHuyTo
Jul 23 '12 at 10:57
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When to use actors instead of messaging solutions such as WebSphere MQ or Tibco Rendezvous?
...quire casting due to Scala's type system.
Also in Java people don't typically make immutable objects which I recommend you do for messaging. Consequently its very easy in Java to accidentally do something using Akka that will not scale (using mutable objects for messages, relying on weird closure ...
Fundamental difference between Hashing and Encryption algorithms
...tions
They provide a mapping between an arbitrary length input, and a (usually) fixed length (or smaller length) output. It can be anything from a simple crc32, to a full blown cryptographic hash function such as MD5 or SHA1/2/256/512. The point is that there's a one-way mapping going on. It's a...
What is the most appropriate way to store user settings in Android application
...o there's some security there, but physical access to a phone could potentially allow access to the values.
If possible I'd consider modifying the server to use a negotiated token for providing access, something like OAuth. Alternatively you may need to construct some sort of cryptographic store, t...
Why does the is operator return false when given null?
...yping extra code:
Instead of having to say
if (X != null && X is Foo) {}
I can just say
if (X is Foo) {}
and be done with it.
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