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Html helper for
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Improved version of Paulius Zaliaduonis' answer:
In order to make the validation work properly I had to change the Model to:
public class ViewModel
{
public HttpPostedFileBase File { get; set; }
[Required(ErrorMessage="A header image is required"), FileExtensio...
Update R using RStudio
... the install.packages() function or the update.packages(function).
So, in order to install R,
go to http://www.r-project.org,
click on 'CRAN',
then choose the CRAN site that you like. I like Kansas: http://rweb.quant.ku.edu/cran/.
click on 'Download R for XXX' [where XXX is your operating syste...
What is Data Transfer Object?
...cular/cyclic dependency.
User Service ----> XX CANNOT CALL XX ----> Order Service
Some ORM Frameworks have the ability of projection via using additional interfaces or classes. So repositories can return View objects directly. There for you do not need an additional transformation.
For ins...
How to sort Map values by key in Java?
...t(key);
// do something
}
This will iterate across the map in natural order of the keys.
Longer answer
Technically, you can use anything that implements SortedMap, but except for rare cases this amounts to TreeMap, just as using a Map implementation typically amounts to HashMap.
For case...
How to create an HTML button that acts like a link?
... Seems a little overkill for styling a single button, no? With border, padding, background, and other CSS effects you can style buttons and links to look similar without bringing over an entire framework. The methodology Bootstrap uses is good, however using Bootstrap seems excessive.
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What is the order of precedence for CSS?
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There are several rules ( applied in this order ) :
inline css ( html style attribute ) overrides css rules in style tag and css file
a more specific selector takes precedence over a less specific one
rules that appear later in the code override earlier rules if bo...
How to simplify a null-safe compareTo() implementation?
...gt; NULL_SAFE_COMPARATOR
= new NullComparator(String.CASE_INSENSITIVE_ORDER);
@Override
public int compareTo(Metadata other) {
int result = NULL_SAFE_COMPARATOR.compare(this.name, other.name);
if (result != 0) {
return result;
}
return NULL_SAFE_COMPARATOR.compare(this....
How can I convert a std::string to int?
...ind updating this answer with from_chars from C++17? It is supposed to be orders of magnitude faster than stoi.
– NathanOliver
Jul 29 '19 at 12:44
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Exact time measurement for performance testing [duplicate]
...= Environment.TickCount; was used as input to the algorithm under test, in order to make it non-deterministic and prevent it from being evaluated at compile-time. That seed is not being used here.
– piedar
Nov 7 '19 at 16:55
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Postgresql GROUP_CONCAT equivalent?
...
Note that the syntax also allows you to specify the order of values in the string (or array, using array_agg) e.g. string_agg(some_column, ',' ORDER BY some_column) or even string_agg(surname || ', ' || forename, '; ' ORDER BY surname, forename)
– IMSoP
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