Occasionally we see StackOverflow Java questions (and C or C++ questions) that ask what something like this:
i += a[i++] + b[i--];
evaluates to ... for some known initial states of i, a and b.
Generally speaking:
for Java the answer is always specified1, but non-obvious, and often difficult ...
Sometimes one would like to pass names of columns from a data frame to a function. They may be provided as strings and used in a function using [[. Let's take a look at the following example, which prints to R console basic stats of selected variables:
basic.stats <- function(dset, vars){
f...
NLTK has by default a bunch of words that it considers to be stop words. It can be accessed via the NLTK corpus with:
from nltk.corpus import stopwords
To check the list of stop words stored for english language :
stop_words = set(stopwords.words("english"))
print(stop_words)
Exam...
Preamble
TL;TR: For illustration-purposes the lines of this document beginning with
'TL;TR:' are followed by commandline refering to Plone-helper-scripts of the
egg 'adi.devgen'. If you execute the command given after 'TL;TR:', it will
create all the files explained of the following chapter.
Th...
Docker is supported on the following 64-bit versions of Ubuntu Linux:
Ubuntu Xenial 16.04 (LTS)
Ubuntu Wily 15.10
Ubuntu Trusty 14.04 (LTS)
Ubuntu Precise 12.04 (LTS)
A couple of notes:
The following instructions involve installation using Docker packages only, and this ensures obtaining...
Haskell Wiki has an example of a non-parametric parameter of a type function:
type family Inspect x
type instance Inspect Age = Int
type instance Inspect Int = Bool
Here x is non-parametric because to determine the outcome of applying Inspect to a type argument, the type function must insp...
The example I'm going to discuss assumes you have a Docker installation that works in your system and a basic understanding of how to work with Node.js . If you are aware of how you must work with Docker , it should be evident that Node.js framework need not be installed on your system, rather we wo...
With pip:
pip install pygame
With conda:
conda install -c tlatorre pygame=1.9.2
Direct download from website :
http://www.pygame.org/download.shtml
You can find the suitable installers fro windows and other operating systems.
Projects can also be found at http://www.pygame.org/
$ cut -d, -f1,3 <<<"a,,b,c,d,e"
a,b
is rather obvious, but with space-delimited strings it might be less obvious to some
$ cut -d ' ' -f1,3 <<<"a b c d e"
a b
cut cannot be used to parse arguments as the shell and other programs do.
There is no way to protect the delimiter. Spreadsheets and similar CSV-handling software usually can recognize a text-quoting character which makes it possible to define strings containing a delimiter. With cut you cannot.
$ cut -d, -f3 <<<'John,Smith,"1, Main Street"'
"1
...
You can only extract portions of lines, not reorder or repeat fields.
$ cut -d, -f2,1 <<<'John,Smith,USA' ## Just like -f1,2
John,Smith
$ cut -d, -f2,2 <<<'John,Smith,USA' ## Just like -f2
Smith
One of the main advantage of std::array as compared to C style array is that we can check the size of the array using size() member function
int main() {
std::array<int, 3> arr = { 1, 2, 3 };
cout << arr.size() << endl;
}
std::array being a STL container, can use range-based for loop similar to other containers like vector
int main() {
std::array<int, 3> arr = { 1, 2, 3 };
for (auto i : arr)
cout << i << '\n';
}
The member function fill() can be used on std::array for changing the values at once post initialization
int main() {
std::array<int, 3> arr = { 1, 2, 3 };
// change all elements of the array to 100
arr.fill(100);
}
SWIFT:
Step 1:
In your Info.plist add the following attribute:
View controller-based status bar appearance
and set its value to
NO
as described in the image below:
Step 2:
In your AppDelegate.swift file, in didFinishLaunchingWithOptions method, add this code:
UIApplication.shared.st...
