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What is the instanceof operator in JavaScript?
... type.
Here are some good examples and here is an example taken directly from Mozilla's developer site:
var color1 = new String("green");
color1 instanceof String; // returns true
var color2 = "coral"; //no type specified
color2 instanceof String; // returns false (color2 is not a String object)
...
Why don't C++ compilers define operator== and operator!=?
...
That problem doesn't stop it from generating a copy ctor, where it's quite harmful.
– MSalters
Oct 20 '08 at 9:57
81
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How get integer value from a enum in Rails?
...
You can get the integer values for an enum from the class the enum is on:
Model.sale_infos # Pluralized version of the enum attribute name
That returns a hash like:
{ "plan_1" => 1, "plan_2" => 2 ... }
You can then use the sale_info value from an instance ...
Create a new object from type parameter in generic class
...cs to tighten up the types:
class TestBase {
hi() {
alert('Hi from base');
}
}
class TestSub extends TestBase {
hi() {
alert('Hi from sub');
}
}
class TestTwo<T extends TestBase> {
constructor(private testType: new () => T) {
}
getNew() : T {
...
Why CancellationToken is separate from CancellationTokenSource?
...e accepted answer got the rationale exactly right. Here's the confirmation from the team who designed this feature (emphasis mine):
Two new types form the basis of the framework: A CancellationToken is
a struct that represents a ‘potential request for cancellation’. This
struct is passed...
How do you get a timestamp in JavaScript?
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Another notable exception is node.js. I came here from Google looking to do the same in node
– Milan Babuškov
Jan 16 '15 at 17:33
59
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What is the correct way to document a **kwargs parameter?
...tion, it seems like it might be easier to roll your own parameters section from the outset (as per some of the other answers), but as a proof of concept this is one way to achieve a nice look for supplementary **kwargs if you're already using Sphinx.
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How to reload a page using JavaScript
... 1.2
window.location.reload(false);
// If we needed to pull the document from
// the web-server again (such as where the document contents
// change dynamically) we would pass the argument as 'true'.
share
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Removing nan values from an array
I want to figure out how to remove nan values from my array. My array looks something like this:
11 Answers
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Pros and cons to use Celery vs. RQ [closed]
...ty queues. RQs priority queue model is simple and effective - workers read from queues in order. Celery requires spinning up multiple workers to consume from different queues. Both approaches work
OS Support. Celery is the clear winner here, as RQ only runs on systems that support fork e.g. Unix sy...