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What is the difference between aggregation, composition and dependency? [duplicate]
...child cannot exist independent of the parent. Example: House (parent) and Room (child). Rooms don't exist separate to a House.
The above two are forms of containment (hence the parent-child relationships).
Dependency is a weaker form of relationship and in code terms indicates that a class uses an...
What is the best Java library to use for HTTP POST, GET etc.? [closed]
...ethods (GET, POST, PUT, DELETE,
HEAD, OPTIONS, and TRACE) in an
extensible OO framework.
Supports encryption with HTTPS (HTTP over SSL) protocol.
Granular non-standards configuration and tracking.
Transparent connections through HTTP proxies.
Tunneled HTTPS connections through HTTP proxies, via the ...
How do I make the method return type generic?
Consider this example (typical in OOP books):
19 Answers
19
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Difference between a class and a module
...
The first answer is good and gives some structural answers, but another approach is to think about what you're doing. Modules are about providing methods that you can use across multiple classes - think about them as "libraries" (as you would see...
Find out whether Chrome console is open
...acing the regex /./ with an empty function object still works.
var devtools = function() {};
devtools.toString = function() {
if (!this.opened) {
alert("Opened");
}
this.opened = true;
}
console.log('%c', devtools);
// devtools.opened will become true if/when the console is opened
...
Get unique values from a list in python [duplicate]
I want to get the unique values from the following list:
30 Answers
30
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Only read selected columns
Can anyone please tell me how to read only the first 6 months (7 columns) for each year of the data below, for example by using read.table() ?
...
How to count lines in a document?
I have lines like these, and I want to know how many lines I actually have...
24 Answers
...
What's the deal with a leading underscore in PHP class methods?
While looking over various PHP libraries I've noticed that a lot of people choose to prefix some class methods with a single underscore, such as
...
How to count the number of occurrences of an element in a List
...a list to their counts). Furthermore, this question was the top result in Google when I searched.
– KJP
Oct 29 '17 at 3:30
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