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From an array of objects, extract value of a property as array
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Here is a shorter way of achieving it:
let result = objArray.map(a => a.foo);
OR
let result = objArray.map(({ foo }) => foo)
You can also check Array.prototype.map().
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Downcasting shared_ptr to shared_ptr?
...he shared_ptr in this example is like the one in Boost, but it doesn't support shared_polymorphic_downcast (or dynamic_pointer_cast or static_pointer_cast for that matter)!
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jQuery.inArray(), how to use it right?
First time I work with jQuery.inArray() and it acts kinda strange.
20 Answers
20
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ASP.NET MVC: Is Controller created for every request?
Very simple question: Are controllers in ASP.NET created for every HTTP request, or are they created at application startup and reused throughout requests?
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Meaning of epsilon argument of assertEquals for double values
...ilon would be 0 (100% accuracy, no exceptions). If you want a margin of error (say for degrees) you could set epsilon to 1 meaning that, for example, 64.2° is the same as 64.8° (since abs(64.8-64.2) < 1)
– Pieter De Bie
Sep 25 '15 at 8:14
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What's a standard way to do a no-op in python?
... constructs in python, and I want to include options which can occur, but for which the corresponding action is to do nothing. I realise I could just exclude those if statements, but for readability I find it helps to include them all, so that if you are looking through the code you can see what hap...
When to use “new” and when not to, in C++? [duplicate]
When should I use the "new" operator in C++? I'm coming from C#/Java background and instantiating objects is confusing for me.
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How do I start a program with arguments when debugging?
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I have been looking for this answer for a week! Thank you!
– bird2920
Jan 5 '17 at 21:30
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Custom method names in ASP.NET Web API
... Delete, however what if I want to add extra methods into these services? For instance, my UsersService should have a method called Authenticate where they pass in a username and password, however it doesn't work.
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PHP: Count a stdClass object
...= count((array)$obj);
Simply casting an object as an array won't always work but being a simple stdClass object it should get the job done here.
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