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In C++, what is a “namespace alias”?
... referring to a long namespace name by a different, shorter name.
As an example, say you wanted to use the numeric vectors from Boost's uBLAS without a using namespace directive. Stating the full namespace every time is cumbersome:
boost::numeric::ublas::vector<double> v;
Instead, you can ...
How to instantiate a File object in JavaScript?
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@PA.Buisson I'm not sure if this holds for all cases(it was sufficient for me), but you can use the Blob() constructor instead, as suggested here
– raymondboswel
Jan 23 '17 at 10:07
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MySQL: Fastest way to count number of rows
...ach time you try to count all rows. (based on primary key's column)
Using PHP to count rows is not very smart, because you have to send data from mysql to php. Why do it when you can achieve the same on the mysql side?
If the COUNT(*) is slow, you should run EXPLAIN on the query, and check if inde...
Converting string from snake_case to CamelCase in Ruby
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How about this one?
"hello_world".split('_').collect(&:capitalize).join #=> "HelloWorld"
Found in the comments here: Classify a Ruby string
See comment by Wayne Conrad
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AngularJS - $anchorScroll smooth/duration
...t straight javascript.
For the sake of self-learning I put together an example with a smooth scrolling service. There are probably better ways to do this so any feedback is encouraged.
To scroll to an element you attach a ng-click="gotoElement(ID)" to any element. I think an even better route wo...
How can I find an element by CSS class with XPath?
...ve been able to find :
For JavaScript : css2xpath & css-to-xpath
For PHP : CssSelector Component
For Python : cssselect
For C# : css2xpath Reloaded
For GO : css2xpath
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How to remove newlines from beginning and end of a string?
...cter in between the string as well. the ask is to remove only the leading & trailing new line character.
– siddhartha
Sep 7 '17 at 11:26
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Pythonic way to find maximum value and its index in a list?
If I want the maximum value in a list, I can just write max(List) , but what if I also need the index of the maximum value?
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Big-O for Eight Year Olds? [duplicate]
...ore about what this means to my code. I understand the concepts mathematically, I just have a hard time wrapping my head around what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the number of operations it has to perform won't...
'is' versus try cast with null check
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Because there's only one cast. Compare this:
if (myObj.myProp is MyType) // cast #1
{
var myObjRef = (MyType)myObj.myProp; // needs to be cast a second time
// before using it as a MyType
...
}
to this:
var myObjRef = m...