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How do I create an abstract base class in JavaScript?
...imal = function() {
if (this.constructor === Animal) {
throw new Error("Can't instantiate abstract class!");
}
// Animal initialization...
};
/**
@abstract
*/
Animal.prototype.say = function() {
throw new Error("Abstract method!");
}
The Animal "class" and the say method a...
When to throw an exception?
...es not have exceptions because the monads and do-notation can automate the error checking for you.
– Jesse
Aug 28 '12 at 2:28
2
...
How can I check for “undefined” in JavaScript? [duplicate]
... for pointing out that your third case - if (myVariable) can also throw an error in two cases. The first is when the variable hasn't been defined which throws a ReferenceError.
// abc was never declared.
if (abc) {
// ReferenceError: abc is not defined
}
The other case is when the variable ...
How to add custom validation to an AngularJS form?
...conuts,bananas,pears" required/>
<span ng-show="myForm.fruitName.$error.blacklist">
The phrase "{{data.fruitName}}" is blacklisted</span>
<span ng-show="myForm.fruitName.$error.required">required</span>
<button type="submit" ng-disabled="myForm.$invalid"&...
How to convert floats to human-readable fractions?
...x that will fit in maxden */
/* first try zero */
printf("%ld/%ld, error = %e\n", m[0][0], m[1][0],
startx - ((double) m[0][0] / (double) m[1][0]));
/* now try other possibility */
ai = (maxden - m[1][1]) / m[1][0];
m[0][0] = m[0][0] * ai + m[0][1];
m[1][0] = m[1]...
Django “login() takes exactly 1 argument (2 given)” error
....com%2fquestions%2f1134476%2fdjango-login-takes-exactly-1-argument-2-given-error%23new-answer', 'question_page');
}
);
Post as a guest
Name
...
TypeError: p.easing[this.easing] is not a function
When trying to show a div element with jQuery, i got this error:
10 Answers
10
...
Error in finding last used cell in Excel with VBA
...ws.Count. We often chose to ignore that. See THIS question on the possible error that you may get. I always advise using . before Rows.Count and Columns.Count. That question is a classic scenario where the code will fail because the Rows.Count returns 65536 for Excel 2003 and earlier and 1048576 for...
Mathematical functions in Swift
...
In the Swift playground, I get the error: No such module 'Cocoa'
– David Poxon
Jun 11 '14 at 10:31
...
Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
...ough. When I try to run ./manage.py runserver I am getting the following error:
25 Answers
...