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Why do people say that Ruby is slow? [closed]
...is just not enough traffic justify using a faster language that costs much more to develop for.
Which version of Ruby would best suit
an application like Stack Overflow
where speed is critical and traffic is
intense?
Other folks have answered this - JRuby, IronRuby, REE will make the Ru...
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...
How do I get the real .height() of a overflow: hidden or overflow: scroll div?
...
More correctly use $('#your_div').prop('scrollHeight');
– Lyubimov Roman
Aug 26 '14 at 9:22
2
...
lexers vs parsers
...understood.
Here's where the real difference usually lies. See below for more.
Grammar understood by lexers: regular grammar (Chomsky's level 3).
Grammar understood by parsers: context-free grammar (Chomsky's level 2).
They attach semantics (meaning) to the language pieces they find.
Lexers att...
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...
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...
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
...
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)
...
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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