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Is pass-by-value a reasonable default in C++11?
...ts the same as moving one with five elements since only the pointer to the array on the heap is moved, not every object in the vector. So it's not actually that big of an issue.
– Lucas
Jul 26 '12 at 17:16
...
What is the optimal Jewish toenail cutting algorithm?
...
function permute (b, n, a) {
if (n==4) {
b.push(a.slice(0)) //copy array
}
else {
for (var i = n; i < 5; i++) {
swap(a,n,i)
permute(b, n+1, a)
swap(a,n,i)
}
}
}
var a = [1,2,3,4,5]
var b = []
var c = []
permute(b,0,a)
for (var i = 1; i < b.length-1; i...
How to refresh app upon shaking the device?
...ke to occur
private static final int MAX_SHAKE_DURATION = 500;
// Arrays to store gravity and linear acceleration values
private float[] mGravity = { 0.0f, 0.0f, 0.0f };
private float[] mLinearAcceleration = { 0.0f, 0.0f, 0.0f };
// Indexes for x, y, and z values
private st...
CSS filter: make color image with transparency white
...idth, canvas.height);
/*
imgData.data is a one-dimensional array which contains
the respective RGBA values for every pixel
in the selected region of the context
(note i+=4 in the loop)
*/
for (var i = 0; i < imgData.data.length; i+=4) {
imgDat...
What is an “unwrapped value” in Swift?
...any old type.
That is why dealing with collection types (Dictionaries and Arrays) in Swift can get kind of hairy.
Case in point:
typealias presentType = [Int:Any?]
func wrap(i:Int, gift:Any?) -> presentType? {
if(i != 0) {
let box : presentType = [i:wrap(i-1,gift:gift)]
r...
What is the Scala identifier “implicitly”?
...ow it is used in SeqLike#sorted. Implicit Parameters are also used to pass Array manifests, and CanBuildFrom instances.
Scala 2.8 allows a shorthand syntax for implicit parameters, called Context Bounds. Briefly, a method with a type parameter A that requires an implicit parameter of type M[A]:
de...
What is the C runtime library?
...at runtime are implemented in the runtime library, e.g. some logic errors, array bounds checking, dynamic type checking, exception handling and possibly debugging functionality. For this reason, some programming bugs are not discovered until the program is tested in a "live" environment with real da...
Understanding Canvas and Surface concepts
...A Bitmap is simply a wrapper for a collection of pixels. Think of it as an array of pixels with some other convenient functions.
The Canvas is simply the class that contains all the drawing methods. It is similar to the Graphics class in AWT/Swing if you are familiar with that. All the logic on how...
Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application
...acebookFriendsTask.class.getSimpleName();
GraphObject graphObject;
ArrayList<FacebookFriend> myList = new ArrayList<FacebookFriend>();
@Override
protected Boolean doInBackground(FacebookFriend.Type... pickType) {
//
// Determine Type
//
St...
Why are preprocessor macros evil and what are the alternatives?
...rk in a regular expression in C (you could make something that averages an array of any type of number, which C can't do - but C++ has templates for that). Whilst C++11 adds a few more things that "you don't need macros for this", it's mostly already solved in earlier C/C++.
– ...