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Detecting an “invalid date” Date instance in JavaScript
...
Here's how I would do it:
if (Object.prototype.toString.call(d) === "[object Date]") {
// it is a date
if (isNaN(d.getTime())) { // d.valueOf() could also work
// date is not valid
} else {
// date is valid
}
} else {
// not a date
}
Update [2018-05-31]: If you...
Is an empty href valid?
...leted by RFC 3986 (which is currently IETF’s URI standard), which essentially says the same.
HTML5
HTML5 uses (valid URL potentially surrounded by spaces → valid URL) W3C’s URL spec, which has been discontinued. WHATWG’s URL Standard should be used instead (see the last section).
HTML 5.1...
Moving from CVS to Git: $Id$ equivalent?
... for example, you packaged a version file with the source (or even rewrote all the content for distribution) to show that number. Let's say that packaged version was 2.2-12-g6c4ae7a (not a release, but a valid version).
You can now see exactly how far behind you are (4 commits), and you can see exa...
How to add target=“_blank” to JavaScript window.location?
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@twinlakes this gets blocked in all modern browsers.
– Ben Racicot
Nov 4 '15 at 15:21
...
Get generic type of class at runtime
...ned, it's only possible via reflection in certain circumstances.
If you really need the type, this is the usual (type-safe) workaround pattern:
public class GenericClass<T> {
private final Class<T> type;
public GenericClass(Class<T> type) {
this.type = type;...
How to reuse existing C# class definitions in TypeScript projects
...del already there. I want my two projects (client side and server side) totally separated as two teams will work on this... JSON and REST is used to communicate objects back and forth.
...
jQuery Determine if a matched class has a given id
...he selector by combining multiple selectors. For instance, we could target all elements with a given id, that also have a particular class:
$("#foo.bar"); // Matches <div id="foo" class="bar">
This should look similar to something you'd write in CSS. Note that it won't apply to all #foo ele...
Stop Mongoose from creating _id property for sub-document array items
If you have subdocument arrays, Mongoose automatically creates ids for each one. Example:
6 Answers
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C# Linq Group By on multiple columns [duplicate]
...perties in the group by, is there a cleaner way of doing this then listing all the properties?
– guiomie
Aug 21 '15 at 18:35
2
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Python: Is it bad form to raise exceptions within __init__?
...t have been designed with exception safety in mind, the destructor is not called if an exception is thrown in the constructor of an object (meaning that the initialization of the object is incomplete). This is often not the case in scripting languages, such as Python. For example, the following code...