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ASP.NET MVC: Custom Validation by DataAnnotation
...lt; this.MinLength)
{
return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName));
}
return null;
}
}
and then you might have a view model and decorate one of its properties with it:
public class MyViewModel
{
[CombinedMinLength(...
What are copy elision and return value optimization?
... or pass-by-value feasible in practice (restrictions apply).
It's the only form of optimization that elides (ha!) the as-if rule - copy elision can be applied even if copying/moving the object has side-effects.
The following example taken from Wikipedia:
struct C {
C() {}
C(const C&) { std::...
How to add 30 minutes to a JavaScript Date object?
...
var in30Mins = new Date(+new Date() + 1.8e6) is a one–liner, but not sure it's any better than a two–liner. ;-)
– RobG
Jun 18 '17 at 12:44
...
How to retrieve Request Payload
...just passing json data through the http body, instead of application/x-www-form-urlencoded data.
You can fetch this data with this snippet:
$request_body = file_get_contents('php://input');
If you are passing json, then you can do:
$data = json_decode($request_body);
$data then contains the j...
Remove duplicates from an array of objects in JavaScript
...t you want to not be duplicated. Now can this be done through reducer for e6 standards?
– Christian Matthew
Sep 16 '19 at 19:09
add a comment
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How do I resolve “Cannot find module” error using Node.js?
...For example, if the error is:
{ [Error: Cannot find module '/root/.npm/form-data'] code: 'MODULE_NOT_FOUND' }
then you can resolve this issue by executing the command npm install --save form-data.
share
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Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
...9.6161 (SP1)
Registry Key: HKLM\SOFTWARE\Classes\Installer\Products\6E815EB96CCE9A53884E7857C57002F0
Configuration: x86
Version: 9.0.30729.6161 (Actual $Version data in registry: 0x9007809 [DWORD])
Direct Download URL: https://download.microsoft.com/download/d/d/9/dd9a82d0-52ef-40db-8dab-795376989...
Using git repository as a database backend
...d documents. Each document is several kilobytes of data in some structured form (I'd prefer YAML, but it may just as well be JSON or XML).
...
Test for equality among all elements of a single vector
...'s solution is ~10x for x, ~3x faster for y and slightly slower for runif(1e6).
– Joshua Ulrich
Jan 21 '11 at 18:34
...
How to assign a Git SHA1's to a file without Git?
...cter string.
For example, the hash of an empty file:
sha1("blob 0\0") = "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
$ touch empty
$ git hash-object empty
e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
Another example:
sha1("blob 7\0foobar\n") = "323fae03f4606ea9991df8befbb2fca795e648fa"
$ echo "foob...