extend

问题 I am doing some tests with Ruby 2.7.1 on FreeBSD 12.1. I know how to extend a class with module with for instance this : class Myclass def mymethod extend Mymodule end end But is it possible to obtain the same result with something that looks like this : class Myclass def mymethod var = "Mymodule" extend var end end If I do this like that, I off-course obtain an error, since extend is pointing to a string and not a module. Here are some explanations - it would be useful in the following

问题 Inspired by theses questions: Get a specific octet from the string representation of an IPv4 address Powershell - Checking IP Address range based on CSV file I am trying to extend the IPAddress class with an ToBigInt() method in PowerShell (if even possible) to be able to easily compare (IPv4 and IPv6) addresses using comparison operations along with -lt and -gt . E.g.: ([IPAddress]'2001:db8::8a2e:370:7334').ToBigInt() -lt ([IPAddress]'2001:db8::8a2e:370:7335').ToBigInt() My first attempt:

问题 Inspired by theses questions: Get a specific octet from the string representation of an IPv4 address Powershell - Checking IP Address range based on CSV file I am trying to extend the IPAddress class with an ToBigInt() method in PowerShell (if even possible) to be able to easily compare (IPv4 and IPv6) addresses using comparison operations along with -lt and -gt . E.g.: ([IPAddress]'2001:db8::8a2e:370:7334').ToBigInt() -lt ([IPAddress]'2001:db8::8a2e:370:7335').ToBigInt() My first attempt:

问题 What is the workflow of processing a signal in python ? I set a signal handler, when the signal occur ,how does python invoke my function? Does the OS invoke it just like C program? If I am in a C extend of python ,is it interrupted immediately ? Now it's clear to me how does python process handle a signal . When you set a signal by the signal module , the module will register a function signal_handler(see $src/Modules/signalmodule.c) ,which set your handler and flag it as 1( Handlers[sig_num

来源： https://stackoverflow.com/questions/64641417/typescript-inherit-the-type-of-values-not-all-the-keys-from-a-record-interf

问题 I wrote a class to represent vectors in Python (as an exercise) and I'm having problems with extending the built-in operators. I defined a __mul__ method for the vector class. The problem is that in the expression x * y the interpreter calls the __mul__ method of x, not y. So vector(1, 2, 3) * 2 returns a vector <2, 4, 6> just like it should; but 2 * vector(1, 2, 3) creates a TypeError because the built-in int class does not support multiplication by my user-defined vectors. I could solve

问题 I wrote a class to represent vectors in Python (as an exercise) and I'm having problems with extending the built-in operators. I defined a __mul__ method for the vector class. The problem is that in the expression x * y the interpreter calls the __mul__ method of x, not y. So vector(1, 2, 3) * 2 returns a vector <2, 4, 6> just like it should; but 2 * vector(1, 2, 3) creates a TypeError because the built-in int class does not support multiplication by my user-defined vectors. I could solve

问题 Let's say I have an empty 1D array: var data = []; Now, I want to add value of 1 to data[1][1][3]; To do this, I need to extend data array to: data = [ [], [], [[],[],[1]] ] Yeah, pretty sure that I have to write a function and pass dimension values as 1D array [1, 1, 3] and check 1. if there is second, third dimension and if 'no' create them and 2. if its size are greater or equal. For just this example, function would be function setData(value_, index_){ if(data[index_[0]] == undefined){

问题 In Javascript, with the following illustration code: class Base { constructor() { this._val = 1 } get val() { return this._val } } class Xtnd extends Base { set val(v) { this._val = v } } let x = new Xtnd(); x.val = 5; console.log(x.val); // prints 'undefined' the instance x will not inherit get val()... from Base class. As it is, Javascript treat the absence of a getter, in the presence of the setter, as undefined. I have a situation in which I have many classes that all have the exact same

问题 In Javascript, with the following illustration code: class Base { constructor() { this._val = 1 } get val() { return this._val } } class Xtnd extends Base { set val(v) { this._val = v } } let x = new Xtnd(); x.val = 5; console.log(x.val); // prints 'undefined' the instance x will not inherit get val()... from Base class. As it is, Javascript treat the absence of a getter, in the presence of the setter, as undefined. I have a situation in which I have many classes that all have the exact same