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is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
...
Sadly - no. The closest you can do is:
int y = (x != null) ? x : -1;
Of course, you can wrap this up in library methods if you feel the need to (it's unlikely to cut down on length much), but at the syntax level there isn't anything more succinct available.
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Determine which element the mouse pointer is on top of in JavaScript
...mentFromPoint which does what it sounds like.
What we need is to find the x and y coords of the mouse and then call it using those values:
var x = event.clientX, y = event.clientY,
elementMouseIsOver = document.elementFromPoint(x, y);
document.elementFromPoint
jQuery event object
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Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
I was going through the exercises in Ruby Koans and I was struck by the following Ruby quirk that I found really unexplainable:
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How to determine if one array contains all elements of another array
... @Chris - You could try using Array#uniq for that. With Holger Just's example, it would be (a2.uniq - a1.uniq).empty?
– Nick
Dec 4 '12 at 17:07
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Method Resolution Order (MRO) in new-style classes?
In the book Python in a Nutshell (2nd Edition) there is an example which uses
old style classes to demonstrate how methods are resolved in classic resolution order and
how is it different with the new order.
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Is it possible to install APK file if more than one emulators/devices are connected [duplicate]
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yes, the number you are getting after executing adb devices
– Mohammed Azharuddin Shaikh
Aug 25 '11 at 7:09
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Writing your own STL Container
...ators.
template <class T, class A = std::allocator<T> >
class X {
public:
typedef A allocator_type;
typedef typename A::value_type value_type;
typedef typename A::reference reference;
typedef typename A::const_reference const_reference;
typedef typename A::differenc...
Ignore Typescript Errors “property does not exist on value of type”
In VS2013 building stops when tsc exits with code 1. This was not the case in VS2012.
10 Answers
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What is the “right” way to iterate through an array in Ruby?
...terate through all the elements:
array = [1, 2, 3, 4, 5, 6]
array.each { |x| puts x }
Prints:
1
2
3
4
5
6
This will iterate through all the elements giving you the value and the index:
array = ["A", "B", "C"]
array.each_with_index {|val, index| puts "#{val} => #{index}" }
Prints:
A =>...
How to filter object array based on attributes?
..._of_beds >=2 &&
el.num_of_baths >= 2.5;
});
Live Example:
var obj = {
'homes': [{
"home_id": "1",
"price": "925",
"sqft": "1100",
"num_of_beds": "2",
"num_of_baths": "2.0",
}, {
...