Recent questions tagged scope

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scope - Is there a generic way to memoize in Scala?

I wanted to memoize this: def fib(n: Int) = if(n <= 1) 1 else fib(n-1) + fib(n-2) println(fib( ... outside range otherwise } dp(s.length, t) } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scope - In Haskell, when do we use in with let?

In the following code, the last phrase I can put an in in front. Will it change anything? Another question: If ... . Do I miss something here? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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772 views

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scope - Static (Lexical) Scoping vs Dynamic Scoping (Pseudocode)

Program A() { x, y, z: integer; procedure B() { y: integer; y=0; x=z+1; z=y+2; } ... their values in the two different types of scopes? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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790 views

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scope - Why can't I assign values to global variables outside a function in C?

Suppose I have a global variable, and I want to assign another variable to it. I've found out that you can ... 8; ^ Why is this happening? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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762 views

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scope - How do I create a static local variable in Java?

I've read Java does not support static local variables unlike C/C++. Now if I want to code a function ... I resort to using instance variables? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scope - String with 'f' prefix in python-3.6

I'm trying out Python 3.6. Going through new code, I stumbled upon this new syntax: f"My formatting string!" ... an f-prefixed string can take? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scope - Examples of the perils of globals in R and Stata

In recent conversations with fellow students, I have been advocating for avoiding globals except to store constants. ... are Bad Are global variables bad? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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896 views

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scope - Python overwriting variables in nested functions

Suppose I have the following python code: def outer(): string = "" def inner(): string = "String was changed ... , it just lives in an outer scope. Ideas? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scope - Is window really global in Javascript?

Take this piece of Javascript in a browser: <script> console.log(window.someThing); var x = 12; function foo() { ... ) { console.log(window.x); } </script> Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scope - Why enclose blocks of C code in curly braces?

I am looking at some C code, and have noticed it is full of these curly braces surrounding blocks ... relevant to the functionality of the application. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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794 views

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scope - What is the difference between 'my' and 'our' in Perl?

I know what my is in Perl. It defines a variable that exists only in the scope of the block in which it is ... What does our do? How does our differ from my? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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scope - What is the true meaning of pass-by-reference in modern languages like Dart?

Working with Futures in Dart, I've come across an interesting issue. import 'dart:async'; class ... _handleMessage (dart:isolate-patch/isolate_patch.dart:128) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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835 views

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scope - Controlling the value of 'this' in a jQuery event

I have created a 'control' using jQuery and used jQuery.extend to assist in making it as OO as possible. During ... was in the event. What is the jQuery way? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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831 views

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scope - Declaring and initializing variables within Java switches

I have a crazy question about Java switches. int key = 2; switch (key) { case 1: int value = 1; ... the The local variable value may not have been initialized. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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941 views

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scope - JavaScript closures vs. anonymous functions

A friend of mine and I are currently discussing what is a closure in JS and what isn't. We just ... of those two solutions uses closures to accomplish this. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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734 views

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scope - Why does this function return a different value every time?

Can someone explain the following behavior? Specifically, why does the function return a different list every time? Why isn't ... to output '(1 0 0) every time? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

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scope - C comma operator

Why is the expression specified inside a comma operator (such as the example below) not considered a constant ... not dealt this aspect of comma operator. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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895 views

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scope - How can I access a shadowed global variable in C?

How can I access a shadowed global variable in C? In C++ I can use :: for the global namespace. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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scope - What is the correct term for variable shadowing in JavaScript?

Below we have an IIFE which (like any function) creates a local scope. Inside that scope there is a ... (common) name for this? Overshadowing? Overloading? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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844 views

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scope - Global variables in Javascript across multiple files

A bunch of my JavaScript code is in an external file called helpers.js. Inside the HTML that calls this JavaScript ... Is what I am trying to do even feasible? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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838 views

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scope - What underlies this JavaScript idiom: var self = this?

I saw the following in the source for WebKit HTML 5 SQL Storage Notes Demo: function Note() { var self = ... it once, will I start seeing it everywhere? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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803 views

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scope - Scoping in Python 'for' loops

I'm not asking about Python's scoping rules; I understand generally how scoping works in Python for loops. ... be caught by interpreters in other languages. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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704 views

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scope - What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … })()”?

I have been reading a lot of Javascript lately and I have been noticing that the whole file is wrapped ... rather than a simple set of constructor functions? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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873 views

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scope - Surprised that global variable has undefined value in JavaScript

Today, I got completely surprised when I saw that a global variable has undefined value in a certain case. Example: var ... //B console.log(value); } test(); Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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748 views

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scope - What's the correct way to communicate between controllers in AngularJS?

What's the correct way to communicate between controllers? I'm currently using a horrible fudge involving ... ; window.fetchStockSubgroups(prod_grp); } } Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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715 views

1 answer

scope - Javascript: Do I need to put this.var for every variable in an object?

In C++, the language I'm most comfortable with, usually one declares an object like this: class foo { public ... to define an object where this isn't necessary? Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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783 views

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scope - Javascript function scoping and hoisting

I just read a great article about JavaScript Scoping and Hoisting by Ben Cherry in which he gives the following ... function. Still doesn't click for me. Question&Answers:os...

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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688 views

1 answer

scope - Are these unexpected effects in my TicTacToe just Javascript timing aspects I'm unaware of?

I made a TicTacToe game that happily works. I'm trying to solve two things though. The opponent's move ... -unexpected-effects-in-my-tictactoe-just-javascript-timing-aspects-im...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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