Advertisements I want to know what the technical term for a colon in the context of introducing a suite after a statement is called. I do not mean colons in slices, key-value pairs or type hints, but this kind of usage: if True: pass else: pass try: raise except: pass def foo(): pass lambda: …… Read More What is the term for a colon before a suite in Python syntax?
Advertisements I need to count the number of digits in an integer number. My approach is to turn the number into a string, and then count the characters in the string. I have the correct result if I do this "step by step", with intermediate variables: #include <string> float videoLengthMs = 123456; int cielo =… Read More In C++, wrong result in the counting of the number of digits, converting to string and using .length()
Advertisements I’m trying to get a Logical ALL function working, but can’t figure out the syntax. I already have a boolean column in my data, and I’m trying to aggregate by some other column using a Logical ALL. If my data is: category value A 1 A 1 A 1 B 0 B 0 B… Read More MySQL Logical ALL
Advertisements So hello everybody. I recently had a problem which I tried to use python included file functions and stuff i tried making a text editor which was when i encountered a problem i tried to make the txteditor like this: one = input() two = input() three = input() four = input() five =… Read More Having problems while creating a text editor using python
Advertisements For a multilingual website I want to detect existence of region code (fr, en, es, etc) inside url. The goal is to add region code for each url that doesn’t have yet one , for example : https://subdomain.domain.com/fr. To do I use wp_safe_redirect() function and this condition which works: if(preg_match ("/^(?:(?!fr).)*$/i", $_SERVER[‘REQUEST_URI’])){ wp_safe_redirect($addlang.’/’.$currentpage); }… Read More php: What good syntax for integrating a variable into regex
Advertisements It’s a simple question. We have the await keyword which allows the function execution to return a result before continuing. Of course you can use promises in the same way, but I’m specifically interested in async in this question. An async function would appear in the following context. const funcA = async newValue =>… Read More Syntax question: Why is it necessary to define a function as async in JS?
Advertisements I don’t understand why I can’t use numpy. after I give it an alias. I got an error for this. import numpy as np ar = numpy.array([1,2,3,4,5]) print(ar) I can only type import numpy as np ar = np.array([1,2,3,4,5]) print(ar) >Solution : That is just how the import … as statement behaves. You choose… Read More Python 'as' keyword
Advertisements I am learning C++ for the first time, and I’m going through "Understanding the C++ Programming Language, Fourth Edition, C++11". I’m having trouble getting some code to compile from an early section. I’m creating a custom Vector class with some basic functionality using the code below: #include <iostream> class Vector { public: Vector(int s)… Read More Constructor Definition in C++
Advertisements Explain this line of Rust code (what is +?): pub struct BlinkAlloc<A: Allocator = +Global> { >Solution : I think you are looking at this: pub struct BlinkAlloc<A: Allocator = +Global> { arena: ArenaLocal, allocator: A, } This is not valid Rust syntax… usually. But this struct definition is actually inside a macro call.… Read More What is this + (plus) in trait bounds?
Advertisements So in Kotlin you can write the below function in two ways: fun getProduct(id: Int): Product? { if (id < 1 ) return null return productProvider.getProduct(id) /// Assuming getProduct NEVER fails } Or as below: fun getProduct(id: Int) = if (id > 0 ){ productProvider.getProduct(id) /// Assuming getProduct NEVER fails }else { null }… Read More Correct usage of return if in Kotlin