You may use the same name (identifier). It will be a different object. They will not affect each other. Inside the inner loop, there is no way to refer to the object used in the outer loop (unless you make special provisions for that, as by providing a pointer to it). This is generally bad … Read more
You cannot define a function within another function in standard C. You can declare a function inside of a function, but it’s not a nested function. gcc has a language extension that allows nested functions. They are nonstandard, and as such are entirely compiler-dependent.
Original C++03 answer: The benefit from a namespace (over a class) is that you can use using declarations when you want. The problem with using a namespace is that namespaces can be expanded elsewhere in the code. In a large project, you would not be guaranteed that two distinct enums don’t both think they are … Read more
The & character has the function of a this keyword, actually (a thing I did not know at the moment of writing the answer). It is possible to write: .class1 { &.class2 {} } and the CSS that will be generated will look like this: .class1.class2 {} For the record, @grobitto was the first to … Read more
In JavaScript the this object is really based on how you make your function calls. In general there are three ways to setup the this object: someThing.someFunction(arg1, arg2, argN) someFunction.call(someThing, arg1, arg2, argN) someFunction.apply(someThing, [arg1, arg2, argN]) In all of the above examples the this object will be someThing. Calling a function without a leading … Read more
The HTML5 spec tells us that the <p> element’s content model is phrasing content. Phrasing content is defined by the spec: 3.2.5.1.5 Phrasing content Phrasing content is the text of the document, as well as elements that mark up that text at the intra-paragraph level. Runs of phrasing content form paragraphs. a (if it contains … Read more
class Outer(object): outer_var = 1 class Inner(object): @property def inner_var(self): return Outer.outer_var This isn’t quite the same as similar things work in other languages, and uses global lookup instead of scoping the access to outer_var. (If you change what object the name Outer is bound to, then this code will use that object the next … Read more
Is this really possible. Yes. function a(x) { // <– function function b(y) { // <– inner function return x + y; // <– use variables from outer scope } return b; // <– you can even return a function. } console.log(a(3)(4));
Intro: Nested classes relate to other classes a little differently than outer classes. Taking Java as an example: Non-static nested classes have access to other members of the enclosing class, even if they are declared private. Also, non-static nested classes require an instance of the parent class to be instantiated. OuterClass outerObj = new OuterClass(arguments); … Read more
This functionality already exists in the standard libraries, so I recommend you just use their class. >>> from types import SimpleNamespace >>> d = {‘key1’: ‘value1’, ‘key2’: ‘value2′} >>> n = SimpleNamespace(**d) >>> print(n) namespace(key1=’value1′, key2=’value2’) >>> n.key2 ‘value2’ Adding, modifying and removing values is achieved with regular attribute access, i.e. you can use statements … Read more