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What is the difference between string primitives and String objects in JavaScript?
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JavaScript has two main type categories, primivites and objects.
var s = 'test';
var ss = new String('test');
The single quote/double quote patterns are identical in terms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actu...
Moment js date time comparison
I'm using moment.js to format my date time, here I have two date values, and I want to achieve a particular function when one date is greater than the other. I read most of their docs, but didn't find the function to achieve this. I know it will be there.
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explicit casting from super class to subclass
... telling the compiler "trust me. I'm a professional, I know what I'm doing and I know that although you can't guarantee it, I'm telling you that this animal variable is definitely going to be a dog."
Since the animal isn't actually a dog (it's an animal, you could do Animal animal = new Dog(); and ...
how do i block or restrict special characters from input fields with jquery?
...l allowed for the use of control characters (e.g., backspace, delete, tab) and copy+paste. None of the provided answers that I tried satisfied all of these requirements, so I came up with the following using the input event.
$('input').on('input', function() {
$(this).val($(this).val().replace(/[...
Using mixins vs components for code reuse in Facebook React
I'm beginning to use Facebook React in a Backbone project and so far it's going really well.
However, I noticed some duplication creeping into my React code.
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How do you represent a JSON array of strings?
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I'll elaborate a bit more on ChrisR awesome answer and bring images from his awesome reference.
A valid JSON always starts with either curly braces { or square brackets [, nothing else.
{ will start an object:
{ "key": value, "another key": value }
Hint: although javascrip...
Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception
...& getting this exception.
I have already included common-logging1.1.1.jar and spring.jar file. Could you please help to out?
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How to create named and latest tag in Docker?
...n image containing Node.js 0.10.24). I built that image using a Dockerfile and executing docker build and by providing a tag using the -t parameter.
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How to check if a user is logged in (how to properly use user.is_authenticated)?
...ng. I need to check if the current site user is logged in (authenticated), and am trying:
6 Answers
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What does the exclamation mark mean in a Haskell declaration?
...s I try to learn Haskell using a real project to drive it. I don't understand what the exclamation mark in front of each argument means and my books didn't seem to mention it.
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