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How to select the first element with a specific attribute using XPath
...store/book[@location='US'][1] works only with simple structure.
Add a bit more structure and things break.
With
<bookstore>
<category>
<book location="US">A1</book>
<book location="FIN">A2</book>
</category>
<category>
<book location="FI...
Parallel.ForEach vs Task.Factory.StartNew
...ion. While the results will be (nearly) the same, this will introduce far more overhead than necessary, especially for large collections, and cause the overall runtimes to be slower.
FYI - The Partitioner used can be controlled by using the appropriate overloads to Parallel.ForEach, if so desired....
Functional, Declarative, and Imperative Programming [closed]
...ramming. The distinction from imperative is that due to immutability (i.e. more generally RT), these "steps" cannot depend on mutable state, rather only the relational order of the expressed logic (i.e. the order of nesting of the function calls, a.k.a. sub-expressions).
For example, the HTML para...
Python __call__ special method practical example
...
So if used correctly, it can make the code more readable. I assume if it is used on the wrong place, it would make the code very unreadable as well.
– mohi666
Apr 29 '11 at 0:19
...
In Angular, I need to search objects in an array
...lter) {
$scope.fish = [{category:'freshwater', id:'1', name: 'trout', more:'false'}, {category:'freshwater', id:'2', name:'bass', more:'false'}]
$scope.showdetails = function(fish_id){
var found = $filter('getById')($scope.fish, fish_id);
console.log(found);
$s...
CSS - Expand float child DIV height to parent's height
... width: 50%;
position: absolute;
right: 0;
top: 0;
}
Find more detailed results with CSS examples here and more information about equal height columns here.
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Counting the number of True Booleans in a Python List
...t method:
>>> [True,True,False].count(True)
2
This is actually more efficient than sum, as well as being more explicit about the intent, so there's no reason to use sum:
In [1]: import random
In [2]: x = [random.choice([True, False]) for i in range(100)]
In [3]: %timeit x.count(True)
...
Setting variable to NULL after free
...little bit pointless if it is "obvious" that the pointer isn't accessed anymore after being freed, so this style is more appropriate for member data and global variables. Even for local variables, it may be a good approach if the function continues after the memory is released.
To complete the styl...
How to declare global variables in Android?
...subclassing Application. Read it at your own risk.
ORIGINAL ANSWER:
The more general problem you are encountering is how to save state across several Activities and all parts of your application. A static variable (for instance, a singleton) is a common Java way of achieving this. I have found ho...
Why is Multiple Inheritance not allowed in Java or C#?
...uch complexity to the languages while providing too little benefit.
For a more fun and in-depth read, there are some articles available on the web with interviews of some of the language designers. For example, for .NET, Chris Brumme (who worked at MS on the CLR) has explained the reasons why they ...