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What is ViewModel in MVC?
...ewModel : ViewModelBase
{
[Display(Name = "First Name")]
[Required(ErrorMessage = "First name required")]
public string FirstName { get; set; }
[Display(Name = "Last Name")]
[Required(ErrorMessage = "Last name required")]
public string LastName { get; set; }
}
The key thin...
Centering a background image, using CSS
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There's an error in your code. You're using a mix of full syntax and shorthand notation on the background-image property.This is causing the no-repeat to be ignored, since it's not a valid value for the background-image property.
body{...
Remove ActiveRecord in Rails 3
...ments/development.rb, remove or comment out config.active_record.migration_error = :page_load
Potentially you have to remove active_record helpers from the spec_helper (via VenoM in the comments)
Potentially you have to remove the ConnectionManagement middleware (seems to be the case with unicorn): ...
Add floating point value to android resources/values
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just a note, you should use type="fraction" to avoid errors in Java code
– adek111
Dec 19 '18 at 15:03
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jQuery $.ajax(), $.post sending “OPTIONS” as REQUEST_METHOD in Firefox
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The reason for the error is the same origin policy. It only allows you to do XMLHTTPRequests to your own domain. See if you can use a JSONP callback instead:
$.getJSON( 'http://<url>/api.php?callback=?', function ( data ) { alert ( data ...
How to return a value from __init__ in Python?
...t recent call last):
File "<stdin>", line 1, in <module>
TypeError: __init__() should return None
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How do you find out the type of an object (in Swift)?
...licitly unwrapped optionals! i.e. var myVar: SomeType!. Compiler gives the error "Cannot convert value of type 'SomeType!.Type' (aka 'ImplicitlyUnwrappedOptional<SomeType>.Type') to expected argument type 'AnyClass' (aka 'AnyObject.Type') Compiler suggest adding as! AnyClass after the type bu...
Check OS version in Swift?
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func runNewCode() {
guard #available(iOS 13.0, *) else {
fatalError()
}
// do new stuff
}
func runLegacyCode() {
// do old stuff
}
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How do I position one image on top of another in HTML?
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One issue I noticed that could cause errors is that in rrichter's answer, the code below:
<img src="b.jpg" style="position: absolute; top: 30; left: 70;"/>
should include the px units within the style eg.
<img src="b.jpg" style="position: absolute; ...
How to set size for local image using knitr for markdown?
...e figure dimensions, e.g. out.width='100pt', otherwise latex will throw an error about illegal unit of measure.
– andybega
Apr 15 '16 at 11:23
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