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Why use Ruby's attr_accessor, attr_reader and attr_writer?
...tten assuming that age, once set, does not change, then a bug could result from code calling that mutator.
But what is happening behind the scenes?
If you write:
attr_writer :age
That gets translated into:
def age=(value)
@age = value
end
If you write:
attr_reader :age
That gets transla...
Why does my JavaScript code receive a “No 'Access-Control-Allow-Origin' header is present on the req
...
When you are using postman they are not restricted by this policy. Quoted from Cross-Origin XMLHttpRequest:
Regular web pages can use the XMLHttpRequest object to send and receive data from remote servers, but they're limited by the same origin policy. Extensions aren't so limited. An extension...
What static analysis tools are available for C#? [closed]
...een in development for what seems like forever - it's looking pretty slick from what little I've seen of it, so it would be nice if it would ever see the light of day.
...
What is more efficient? Using pow to square or just multiply it with itself?
...second parameter to pow is an int, then the std::pow(double, int) overload from <cmath> will be called instead of ::pow(double, double) from <math.h>.
This test code confirms that behavior:
#include <iostream>
namespace foo
{
double bar(double x, int i)
{
std::c...
What is __main__.py?
...
You'll have to decide for yourself whether your application could benefit from being executed like this.
Note that a __main__ module usually doesn't come from a __main__.py file. It can, but it usually doesn't. When you run a script like python my_program.py, the script will run as the __main__ ...
Unable to execute dex: method ID not in [0, 0xffff]: 65536
...ally patch the application ClassLoader, so it will be able to load classes from secondary dexes. Fortunately, there's a library that does that for you. Add it to your app's dependencies:
dependencies {
...
compile 'com.android.support:multidex:1.0.0'
}
You need to call the ClassLoader patc...
What are rvalues, lvalues, xvalues, glvalues, and prvalues?
...istinction between expressions that can be moved, and in which direction.
From what I guess based on the draft, the r/l value distinction stays the same, only in the context of moving things get messy.
Are they needed? Probably not if we wish to forfeit the new features. But to allow better optim...
What is the difference between the add and offer methods in a Queue in Java?
...added to collection the add method throws an exception and offer doesn't.
From: http://java.sun.com/j2se/1.5.0/docs/api/java/util/Collection.html#add%28E%29
If a collection refuses to add a
particular element for any reason
other than that it already contains
the element, it must throw an...
Converting Secret Key into a String and Vice Versa
... to store it in DB, so I convert it into a String, but to get back the key from the String. What are the possible ways of accomplishing this?
...
How to remove item from list in C#?
...
Short answer:
Remove (from list results)
results.RemoveAll(r => r.ID == 2); will remove the item with ID 2 in results (in place).
Filter (without removing from original list results):
var filtered = result.Where(f => f.ID != 2); returns all ...