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Test if something is not undefined in JavaScript
...
What if a variable exists and contains the string that reads 'undefined'?
– TomeeNS
Feb 13 '19 at 15:29
1
...
Inject service in app.config
...e not quite using resolves how they're designed.
resolve takes either the string of a service or a function returning a value to be injected. Since you're doing the latter, you need to pass in an actual function:
resolve: {
data: function (dbService) {
return dbService.getData();
}
}
Whe...
Laravel - Route::resource vs Route::controller
...aseController {
public function index() {}
public function show($id) {}
public function store() {}
}
You can also choose what actions are included or excluded like this:
Route::resource('users', 'UsersController', [
'only' => ['index', 'show']
]);
Route::resource('monkeys'...
Django Forms: if not valid, show form with error message
I Django forms, it can check whether the form is valid:
7 Answers
7
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How to make an input type=button act like a hyperlink and redirect using a get request? [duplicate]
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There are several different ways to do that -- first, simply put it inside a form that points to where you want it to go:
<form action="/my/link/location" method="get">
<input type="submit" value="Go to my link location"
name="Submit" id="frm1_submit" />
</...
Android: how to hide ActionBar on certain activities
...idManifest.xml:
<activity android:name=".Activity"
android:label="@string/app_name"
android:theme="@android:style/Theme.NoTitleBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category....
Add unique constraint to combination of two columns
...LECT column1, column2, ... FROM inserted;
END
ELSE
BEGIN
PRINT 'Did nothing.';
END
END
GO
But if you don't tell the user they didn't perform the insert, they're going to wonder why the data isn't there and no exception was reported.
EDIT here is an example that does exactly what you...
AngularJS - $anchorScroll smooth/duration
...s encouraged.
To scroll to an element you attach a ng-click="gotoElement(ID)" to any element. I think an even better route would be to make this a directive.
Here's the working example on jsFiddle.
Update
There are now a number of third-party directives for accomplishing this.
https://github...
Why aren't Java Collections remove methods generic?
...h is predicates. Consider the following sample:
class Person {
public String name;
// override equals()
}
class Employee extends Person {
public String company;
// override equals()
}
class Developer extends Employee {
public int yearsOfExperience;
// override equals()
}
cl...
How do I generate a constructor from class fields using Visual Studio (and/or ReSharper)?
...MTypeRefVoid, position, parentConstructor.Access)
Dim baseCall As String = ":base("
Dim separator As String = ""
For Each parameter As CodeParameter2 In parentConstructor.Parameters
ctor.AddParameter(parameter.Name, parameter.Type, -1)
baseCall += sep...