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Java8: Why is it forbidden to define a default method for a method from java.lang.Object

..., I tried to write an interface that defines a default version of the toString method. Java tells me that this is forbidden, since methods declared in java.lang.Object may not be default ed. Why is this the case? ...
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Dynamically adding properties to an ExpandoObject

...ally add properties to a ExpandoObject at runtime. So for example to add a string property call NewProp I would like to write something like ...
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“Java DateFormat is not threadsafe” what does this leads to?

... threads use a shared SimpleDateFormat. Program: public static void main(String[] args) throws Exception { final DateFormat format = new SimpleDateFormat("yyyyMMdd"); Callable<Date> task = new Callable<Date>(){ public Date call() throws Exception { return ...
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What causes imported Maven project in Eclipse to use Java 1.5 instead of Java 1.6 by default and how

...testCompileSourceRoots}"/> <compilerId implementation="java.lang.String" default-value="javac">${maven.compiler.compilerId}</compilerId> <compilerReuseStrategy implementation="java.lang.String" default-value="${reuseCreated}">${maven.compiler.compilerReuseStrategy}</c...
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Constructors in Go

...n. Supposing you have a struct like this : type Thing struct { Name string Num int } then, if the zero values aren't fitting, you would typically construct an instance with a NewThing function returning a pointer : func NewThing(someParameter string) *Thing { p := new(Thing) ...
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About “*.d.ts” in TypeScript

...; The module's logic is all in index.js: module.exports = function(firstString, secondString) { // your code return result } To add typings, create a file index.d.ts: declare module 'my-module' { export default function anyName(arg1: string, arg2: string): MyResponse; } interface MyRe...
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Is a statically-typed full Lisp variant possible?

...ng new in Typed Racked (same deal as a function that takes a union type of String and Number). An implicit way to see that this can be done is the fact that you can write and use a dynamically typed language in an HM-statically-typed language. – Eli Barzilay M...
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What does ~~ (“double tilde”) do in Javascript?

... integers. This works whether the operands are (floating-point) numbers or strings, and the result is a number. In other words, it yields: function(x) { if(x < 0) return Math.ceil(x); else return Math.floor(x); } only if x is between -(231) and 231 - 1. Otherwise, overflow will occur and ...
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Creating JSON on the fly with JObject

...perties. This is a Sample User Properties public class User { public string Name; public string MobileNo; public string Address; } and i want this property in newtonsoft JObject is: JObject obj = JObject.FromObject(new User() { Name = "Manjunath", MobileNo = "9876543210", ...
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In Functional Programming, what is a functor?

...llection. The type of the full collection is then something like T Int, T String, T Bool, if you are containing integers, strings, or Booleans respectively. If the element type is unknown, it is written as a type parameter a, as in T a. Examples include lists (zero or more elements of type a), th...