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Is there more to an interface than having the correct methods
..., if you want to create a list of boxes and perform some operation on each one, but you want the list to contain different kinds of boxes. On each box you could do:
myBox.close()
(assuming IBox has a close() method) even though the actual class of myBox changes depending on which box you're at in...
Live-stream video from one android phone to another over WiFi
...r days now on how to implement a video streaming feature from an android phone to another android phone over a WiFi connection but I can't seem to find anything useful. I looked on android developers for sample code, stackoverflow, google, android blogs but nothing. All I can find are some sort of p...
Initialize class fields in constructor or at declaration?
... into the top of it.
In terms of best practice the former is less error prone than the latter as someone could easily add another constructor and forget to chain it.
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Why doesn't JavaScript have a last method? [closed]
...lowly.
Many Javascript libraries implement their own last() function. Use one!
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Can someone explain in simple terms to me what a directed acyclic graph is?
Can someone explain in simple terms to me what a directed acyclic graph is? I have looked on Wikipedia but it doesn't really make me see its use in programming.
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How to append something to an array?
...nsole.log(arr);
You can use the push() function to append more than one value to an array in a single call:
// initialize array
var arr = ["Hi", "Hello", "Bonjour", "Hola"];
// append multiple values to the array
arr.push("Salut", "Hey");
// display all values
for (var i = 0; i < arr...
Entity Framework - Include Multiple Levels of Properties
...the answer. Let me try this: To include a collection and then a collection one level down: query.Include(e => e.Level1Collection.Select(l1 => l1.Level2Collection)).
– Bob Horn
May 30 '12 at 19:46
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Which cryptographic hash function should I choose?
... three separate functions.
Collision resistance: How hard is it for someone to find two messages (any two messages) that hash the same.
Preimage Resistance: Given a hash, how hard is it to find another message that hashes the same? Also known as a one way hash function.
Second preimage resistance...
Big O, how do you calculate/approximate it?
...gth value. Now we need the actual definition of the function f(). This is done from the source code, in which each interesting line is numbered from 1 to 4.
There are many ways to calculate the BigOh. From this point forward we are going to assume that every sentence that doesn't depend on the size...
What is the syntax rule for having trailing commas in tuple definitions?
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Assuming that started as a 2 element list that was later extended it has gone wrong in a perhaps not immediately obvious way. Always include the trailing comma and you avoid that trap.
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