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What does “Object reference not set to an instance of an object” mean? [duplicate]
...eproducing this:
static void Main(string[] args)
{
var exampleClass = new ExampleClass();
var returnedClass = exampleClass.ExampleMethod();
returnedClass.AnotherExampleMethod(); //NullReferenceException here.
}
class ExampleClass
{
public ReturnedClass ExampleMethod()
{
...
Mongod complains that there is no /data/db folder
I am using my new mac for the first time today. I am following the get started guide on the mongodb.org up until the step where one creates the /data/db directory. btw, I used the homebrew route.
...
How to get package name from anywhere?
... want to know the nuances in a bit more detail tools.android.com/tech-docs/new-build-system/…
– Kevin Lee
Apr 8 '16 at 12:32
10
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How to change the href for a hyperlink using jQuery
...at uses a simple regular expression to replace this part of the URL with a new one. Note the flexibility this gives you - any sort of modification to the link could be done here.
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What is the difference between Serializable and Externalizable in Java?
...
updating to new link github.com/eishay/jvm-serializers/wiki suggested by @Jack
– noquery
Jun 18 '11 at 17:18
3
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Can vim monitor realtime changes to a file
.... I know I can read an opened file use tail -f sample.xml file, and when new content is written to the file, it'll also write the new content to my screen. Can I have vim automatically fill the new data when a file is updated?
...
Get ID of last inserted document in a mongoDB w/ Java driver
...
I just realized you can do this:
BasicDBObject doc = new BasicDBObject( "name", "Matt" );
collection.insert( doc );
ObjectId id = (ObjectId)doc.get( "_id" );
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What is the meaning of id?
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f7987060%2fwhat-is-the-meaning-of-id%23new-answer', 'question_page');
}
);
...
How to change the background color of the options menu?
...e a call to LayoutInflater.inflate() on the same LayoutInflater instance. New code in Android 2.3 broke this assumption and led to a NullPointerException.
My slightly refined hack below does not rely on this assumption.
Furthermore, the hacks also rely on using an internal, undocumented class nam...
How to get TimeZone from android mobile?
...tting currect time zone :
TimeZone tz = TimeZone.getDefault();
Date now = new Date();
//Import part : x.0 for double number
double offsetFromUtc = tz.getOffset(now.getTime()) / 3600000.0;
String m2tTimeZoneIs = Double.parseDouble(offsetFromUtc);
...