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Finding all objects that have a given property inside a collection [duplicate]
I have some complicated object, such as a Cat, which has many properties, such as age, favorite cat food, and so forth.
2...
PHP - Extracting a property from an array of objects
I've got an array of cats objects:
10 Answers
10
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Why do we need virtual functions in C++?
... void eat() { std::cout << "I'm eating generic food."; }
};
class Cat : public Animal
{
public:
void eat() { std::cout << "I'm eating a rat."; }
};
In your main function:
Animal *animal = new Animal;
Cat *cat = new Cat;
animal->eat(); // Outputs: "I'm eating generic...
Local variables in nested functions
...me point during that execution was assigned each of the 'cow', 'dog', and 'cat' strings, but at the end of the function, cage contains that last value 'cat'. Thus, when you call each of the dynamically returned functions, you get the value 'cat' printed.
The work-around is to not rely on closures. ...
How to search by key=>value in a multidimensional array in PHP
... }
return $results;
}
$arr = array(0 => array(id=>1,name=>"cat 1"),
1 => array(id=>2,name=>"cat 2"),
2 => array(id=>3,name=>"cat 1"));
print_r(search($arr, 'name', 'cat 1'));
Output:
Array
(
[0] => Array
(
[id...
How to remove an element from an array in Swift
...ant to modify a variable you should use var instead, e.g:
var animals = ["cats", "dogs", "chimps", "moose"]
animals.remove(at: 2) //["cats", "dogs", "moose"]
A non-mutating alternative that will keep the original collection unchanged is to use filter to create a new collection without the eleme...
Array extension to remove object by value
...omArray.filter { return $0 != object }
}
Sample:
var myArray = ["Dog", "Cat", "Ant", "Fish", "Cat"]
myArray = arrayRemovingObject("Cat", fromArray:myArray )
Swift 2 (xcode 7b4) array extension:
extension Array where Element: Equatable {
func arrayRemovingObject(object: Element) -> [Elem...
Print string and variable contents on the same line in R
... can use paste with print
print(paste0("Current working dir: ", wd))
or cat
cat("Current working dir: ", wd)
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How to cat a file containing code?
I want to print code into a file using cat <<EOF >> :
4 Answers
4
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Bash foreach loop
...
Something like this would do:
xargs cat <filenames.txt
The xargs program reads its standard input, and for each line of input runs the cat program with the input lines as argument(s).
If you really want to do this in a loop, you can:
for fn in `cat filen...