In this post, we will see how to resolve Javascript: Passing an argument to a function within a function Question: Why does it return undefined undefined is 2 years old.? This one returns the desirable outcome. Can somebody explain what’s ...

In this post, we will see how to resolve How do I define a subclass in Perl when I’m using a closure to limit access to the properties? Question: I’m trying to create a subclass, and create a new property ...

In this post, we will see how to resolve How are IIFEs useful post ES6? Question: I’m learning JavaScript and I understand the general function types, closures, etc. But with IIFEs my initial reaction was “if its immediately invoked, why ...

In this post, we will see how to resolve Strange python closure variable access Question: While trying to implement a decorator with a closure I ran into a somewhat strange behavior, where a variable can be read, but if try ...

In this post, we will see how to resolve I want create a program using closure that will return the equivalent binary value of the given array hexadecimal value in swift Question: This is my code create a program using ...

Question: This compiles: This doesn’t with circular reference errors: Why? I thought the func syntax is just sugar for the second more explicit syntax. Best Answer: The fact that the first one works is a long-standing bug/quirk in the compiler, ...

Question: I have a closure that is supposed to save the return value of a computationally heavy function for reuse. However, when I run the exact same line of code (_ = cached_readonly_property(lambda: "b")), I get different return values based ...

Question: What does nonlocal do in Python 3.x? To close debugging questions where OP needs nonlocal and doesn’t realize it, please use Is it possible to modify variable in python that is in outer, but not global, scope? instead. Although ...

Question: I’m checking out some PHP 5.3.0 features and ran across some code on the site that looks quite funny: as one of the examples on anonymous functions. Does anybody know about this? Any documentation? And it looks evil, should ...

Question: In javascript, when would you want to use this: over this: Best Answer: It’s all about variable scoping. Variables declared in the self executing function are, by default, only available to code within the self executing function. This allows ...