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How do I create a custom iOS view class and instantiate multiple copies of it (in IB)?
...ts the "File's Owner" property to self. We extract the first object in the array and that is the root view of the Nib. We add the view as a subview and Voila it's on screen.
Obviously this just changes the label's background color when the buttons are pushed, but this example should get you well on...
Does using “new” on a struct allocate it on the heap or stack?
...e of course immutable reference types strings being the most popular one.
Array layout/initialization:
Value types -> zero memory [name,zip][name,zip]
Reference types -> zero memory -> null [ref][ref]
share
...
What is the purpose of backbone.js?
...l have to parse them in and out again. It's difficult to store things like arrays, dates or objects, and to parse your data in a structured form.
Data attributes look like this:
<p data-username="derek" data-age="42"></p>
Backbone solves this by providing a Model object to represent ...
Should I use a data.frame or a matrix?
...
Matrices and data frames are rectangular 2D arrays and can be
heterogeneous by rows and columns. They share some methods and
properties, but not all.
Examples:
M <- list(3.14,TRUE,5L,c(2,3,5),"dog",1i) # a list
dim(M) <- c(2,3) ...
How can I use interface as a C# generic type constraint?
...s a generic type and has a constraint, we check the constraint; if it's an array, we check the element type.
At this point I must add that this will break the fact that by default .NET loads types 'lazy'. By scanning all the types, we force the .NET runtime to load them all. For most programs this ...
When should I use jQuery deferred's “then” method and when should I use the “pipe” method?
... the converse does not hold.
Example 1
The result of some operation is an array of objects:
[{value: 2}, {value: 4}, {value: 6}]
and you want to compute the minimum and maximum of the values. Lets assume we use two done callbacks:
deferred.then(function(result) {
// result = [{value: 2}, {valu...
Covariance, Invariance and Contravariance explained in plain English?
...btype of String[], or is neither a subtype of the other? (Answer: In Java, arrays are covariant)
This was still rather abstract. To make it more concrete, let's look at which operations in Java are defined in terms of the subtype relation. The simplest example is assignment. The statement
x = y;
...
Java 8: performance of Streams vs Collections
...atic final int N = 10000;
static List<Integer> sourceList = new ArrayList<>();
static {
for (int i = 0; i < N; i++) {
sourceList.add(i);
}
}
@Benchmark
public List<Double> vanilla() {
List<Double> result = new Array...
What is the most efficient/elegant way to parse a flat table into a tree?
...where each object has a children collection and store them all in an assoc array (/hashtable) where the Id is the key. And blitz through the collection once, adding the children to the relevant children fields. Simple.
But because you're being no fun by restricting use of some good OOP, I'd probabl...
Is 'switch' faster than 'if'?
...table is memory address that holds pointer to the labels in something like array structure. following example will help you understand how jump tables are laid out
00B14538 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 Ø.«.Ø.«.Ø.«.Ø.«.
00B14548 D8 09 AB 00 D8 09 AB 00 D8 09 AB 00 00 00...