{
'name': 'John',
'age': 30,
'city': 'New York'
}.webp){kind=logo}
Ask the right questions to secure the right Io talent among an increasingly shrinking pool of talent.
Io is a dynamic prototype-based programming language, first created by Steve Dekorte in 2002 for software development. It is purely object-oriented, inspired by Smalltalk, Self, Lua, Lisp, and Act1. Io’s unique feature is its consistency and simplicity, having a minimalistic syntax with less than a dozen different types of syntax, and only one data structure, the message. It supports actor-based concurrency, making it popular for high performance computing. References for this information can be found on the official Io language website (iolanguage.org) and Dekorte's personal blog.
The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.
Io has several control flow structures including 'if', 'for', 'while', and 'switch'.
In Io, methods are defined by assigning a function to a slot. For example, 'Person greet := method("Hello" println)'.
In Io, a slot is a named location in an object where a value can be stored. Slots can contain any Io value such as a number, string, list, or another object.
In Io, you can create a new object using the clone method. For example, 'Person := Object clone'.
The basic data types in Io are Number, Boolean, List, String, and Object.
The tech industry is constantly evolving. A candidate's willingness to learn and adapt to new technologies and methodologies is important for their long-term success in the role.
Software development often requires teamwork. A candidate's ability to work effectively in a team can impact the overall productivity and success of projects.
Having experience with other languages can be beneficial as it shows the candidate's ability to learn and adapt to different programming paradigms.
Problem-solving skills are key in any programming role. Their ability to debug code will be crucial in maintaining and improving existing Io applications.
Io is a concurrent language. Understanding and experience with concurrent programming is essential for developing efficient and effective Io applications.
This is crucial as the job role requires expertise in Io programming. Their ability to explain concepts and solve problems in Io will determine their efficiency in the role.
The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.
In Io, file I/O is performed using the 'File' object. For example, 'file := File with("filename.txt")'.
The 'lobby' in Io is the global namespace. All objects are created in the lobby unless specified otherwise.
In Io, inheritance is implemented through the 'clone' method. When an object is cloned, it inherits the slots of the original object.
'Clone' creates a new object that shares the same slots as the original object. 'Proto' returns the prototype of an object, which is the object it was cloned from.
In Io, exceptions can be handled using the 'catch' method. For example, 'try(message) catch(Exception)'.
At this point, a skilled Io engineer should demonstrate strong technical knowledge, problem-solving abilities, and excellent communication skills. Red flags include lack of practical experience, inability to articulate complex ideas simply, or lack of enthusiasm for the role or the industry.
{
'name': 'John',
'age': 30,
'city': 'New York'
}let text = '{"name":"John", "age":30, "city":"New York"}';
let obj = JSON.parse(text);
console.log(obj.name);let arr = '["Ford", "BMW", "Fiat"]';
let obj = JSON.parse(arr);
console.log(obj[1]);let text = '{"employees":[{"firstName":"John", "lastName":"Doe"},{"firstName":"Anna", "lastName":"Smith"},{"firstName":"Peter", "lastName":"Jones"}]}'
let obj = JSON.parse(text);
console.log(obj.employees[1].firstName);let obj = {name: 'John', age: 30, city: 'New York'};
let myJSON = JSON.stringify(obj);
console.log(myJSON);let arr = ['Ford', 'BMW', 'Fiat'];
let myJSON = JSON.stringify(arr);
console.log(myJSON);The final few interview questions for a Io candidate should typically focus on a combination of technical skills, personal goals, growth potential, team dynamics, and company culture.
'Call' and 'perform' are both used to invoke methods in Io. The difference is that 'call' invokes a method on an object without changing the current scope, while 'perform' changes the scope to the object the method is invoked on.
In Io, a custom operator can be created by defining a method on the OperatorTable object. For example, 'OperatorTable addOperator("myOperator", 10, "left")'.
Coroutines in Io are a way to perform non-blocking operations. They are created using the 'Coroutine' object and executed with the 'resume' method.
In Io, a list is created using the 'list' method and elements are added using the 'append' method. For example, 'myList := List clone; myList append(1)'.
':=' is used to create a new slot and assign a value to it. '=' is used to assign a value to an existing slot. '::=' is used to create a slot and assign a value to it, but also updates the slot in the object's prototype if it exists.
Back-end App Developer
Front-end Web Developer
Full Stack Developer (Java)
Full Stack Developer (.Net)
Full Stack Developer (MEAN)
Full Stack Developer (MERN)
DevOps Engineer
Database Engineer (AzureSQL)
Database Engineer (Oracle)
Database Engineer (General)
Solution Architect (.NET)
Solution Architect (Java)
Solution Architect (Ruby)
Solution Architect (Python)
AI Engineer (Python)
Sr. AI Engineer (Python)
AI Strategist (Python)
Business Intelligence Engineer
Systems Analyst
Mainframe Developer (COBOL)
Mainframe Developer (General)