types – Page 3 – Tarik Billa

JAXB: How to change XJC-generated classes names when attr type is specified in XSD?

May 15, 2023 by Tarik

JAXB provides two ways to accomplish this: 1. Inline Schema Anntotations You can use JAXB schema annotations to control the class names. <xs:schema xmlns:xs=”http://www.w3.org/2001/XMLSchema” xmlns:jaxb=”http://java.sun.com/xml/ns/jaxb” jaxb:version=”2.1″> <xs:complexType name=”itemType”> <xs:annotation> <xs:appinfo> <jaxb:class name=”Item”/> </xs:appinfo> </xs:annotation> <xs:attribute name=”id” type=”xs:string” use=”required”/> </xs:complexType> </xs:schema> 2. External Binding File This customization can also be done via and external binding file: … Read more

Is there a way to convert integers to bools in go or vice versa?

May 15, 2023 by Tarik

Int to bool is easy, just x != 0 will do the trick. To go the other way, since Go doesn’t support a ternary operator, you’d have to do: var x int if b { x = 1 } else { x = 0 } You could of course put this in a function: func … Read more

Is it possible to define equality for named types/structs?

May 12, 2023 by Tarik

No. You can’t modify the equality operator and there is no built-in way to add support for custom types to use == syntax. Instead you should compare the pointer values using reflect.DeepEqual. Go supports equality checking structs. type Person struct { Name string } a := Person{“Bill DeRose”} b := Person{“Bill DeRose”} a == b … Read more

Why does the Swift language guide suggest using Int “even when values are known to be non-negative”?

April 6, 2023 by Tarik

I don’t think using UInt is as safe as you think it is. As you noted: let age:UInt = -3 results in a compiler error. I also tried: let myAge:Int = 1 let age:UInt = UInt(myAge) – 3 which also resulted in a compiler error. However the following (in my opinion much more common in … Read more

How to create a circularly referenced type in TypeScript?

March 20, 2023 by Tarik

The creator of TypeScript explains how to create recursive types here. The workaround for the circular reference is to use extends Array. In your case this would lead to this solution: type Document = number | string | DocumentArray; interface DocumentArray extends Array<Document> { } Update (TypeScript 3.7) Starting with TypeScript 3.7, recursive type aliases … Read more

How to cast to a type alias in Go?

March 20, 2023 by Tarik

tl;dr For type assertions (which you use) only the actual type matters. So somethingFuncy is only equal to somethingFuncy and not to func(int) bool. Explanation To start with, this has nothing to do with casting. There is no casting in go. There are type assertions and type conversions. You’re dealing with a type assertion and … Read more

Slice of slices types

February 26, 2023 by Tarik

To be explicit, we can use parentheses to rewrite [][]uint8 as []([]uint8): a slice of (slices of type uint8). Using the make built-in function, for a slice of type T, make(T, n) returns a slice of type T with length n and capacity n. Therefore, make([][]uint8, 2) is equivalent to make([]([]uint8), 2), it returns a … Read more

How do you extend types in GraphQL?

February 26, 2023 by Tarik

Starting with the June2018 stable version of the GraphQL spec, an Object type can extend another Object type: Object type extensions are used to represent a type which has been extended from some original type. For example, this might be used to represent local data In your example, type Animal { species: String } extend … Read more

Converting number primitives (i32, f64, etc) to byte representations

February 18, 2023 by Tarik

As of Rust 1.32 you can use {to,from}_{ne,le,be}_bytes for integral types. let begin = 1234_i32; let bytes = begin.to_ne_bytes(); let and_back = i32::from_ne_bytes(bytes); For floating point you still have to rely on prior methods.

Is Julia dynamically typed?

January 5, 2023 by Tarik

Tim Holy’s answer is quite correct, but I’ll elaborate a bit. First, let’s define some terms – you may disagree with my definitions, but at least you’ll know what I’m saying. The primary difference between static and dynamic languages, in my view, is this: in static languages, expressions have types; in dynamic languages, values have types. … Read more