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What's the difference between a web site and a web application? [closed]
...d course materials, applications for students to register for and withdraw from courses, etc.
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Options for initializing a string array [duplicate]
...[] myString = new string[4];
myString[0] = "string1"; // etc.
Advanced:
From a List
list<string> = new list<string>();
//... read this in from somewhere
string[] myString = list.ToArray();
From StringCollection
StringCollection sc = new StringCollection();
/// read in from file o...
Difference between getContext() , getApplicationContext() , getBaseContext() and “this”
...ctivity.
ContextWrapper.getBaseContext(): If you need access to a Context from within another context, you use a ContextWrapper. The
Context referred to from inside that ContextWrapper is accessed via
getBaseContext().
sh...
Get local IP address
...lowing effect: it sets the destination for Send/Recv, discards all packets from other addresses, and - which is what we use - transfers the socket into "connected" state, settings its appropriate fields. This includes checking the existence of the route to the destination according to the system's r...
Creating default object from empty value in PHP?
...$res = NULL;
$res->success = false; // Warning: Creating default object from empty value
PHP will report a different error message if $res is already initialized to some value but is not an object:
$res = 33;
$res->success = false; // Warning: Attempt to assign property of non-object
In o...
Cache busting via params
...ates a query string, and the browser will therefore think it is a new path from, say, ?v=1.0. Thus causing it to load from file, not from cache. As you want.
And, the browser will assume that the source will stay the same next time you call ?v=1.123 and should cache it with that string. So it will...
What is the difference between map and flatMap and a good use case for each?
...rms an RDD of length N into another RDD of length N.
For example, it maps from two lines into two line-lengths:
rdd.map(_.length).collect
res1: Array[Int] = Array(13, 16)
But flatMap (loosely speaking) transforms an RDD of length N into a collection of N collections, then flattens these int...
PDOException SQLSTATE[HY000] [2002] No such file or directory
...
Laravel 4: Change "host" in the app/config/database.php file from "localhost" to "127.0.0.1"
Laravel 5+: Change "DB_HOST" in the .env file from "localhost" to "127.0.0.1"
I had the exact same problem. None of the above solutions worked for me. I solved the problem by changing the "hos...
Check if string ends with one of the strings from a list
...
Take an extension from the file and see if it is in the set of extensions:
>>> import os
>>> extensions = set(['.mp3','.avi'])
>>> file_name = 'test.mp3'
>>> extension = os.path.splitext(file_name)[1]
>&...
How can I return NULL from a generic method in C#?
...that if you're using this generic method to say, convert a Database object from DbNull to Int and it returns default(T) where T is an int, it'll return 0. If this number is actually meaningful, then you'd be passing around bad data in cases where that field was null. Or a better example would be a D...