Koren Leslie Cohen

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CSS, JavaScript, Work

Front End Engineer Interview Questions

July 20, 2015 by Koren Leslie Cohen

front end engineer interview questions

This post includes a list of questions I was asked when interviewing for front end engineering positions last year.

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JavaScript

Common JavaScript Array Methods

March 25, 2015 by Koren Leslie Cohen

javascript array methods

Common JavaScript array methods, what they return, and whether or not they modify the original array.

12 comments

CSS, JavaScript

Page Preloader with CSS and JavaScript

February 16, 2015 by Koren Leslie Cohen

preloader

There are many advantages of adding a preloader to your website. Not only can this produce a nice visual effect, it can, more importantly, allow time for images and other assets to load.

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JavaScript

Precompiling Handlebars Templates

November 13, 2014 by Koren Leslie Cohen

If you think of an individual tweet as a Handlebars template, you can understand why it would be expensive to compile a template each time a tweet is rendered. Precompiling templates saves time on the client side by reducing your application’s runtime.

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JavaScript

Pausing a JavaScript Loop

November 3, 2014 by Koren Leslie Cohen

preloader

A traditional JavaScript loop iterates over an array almost instantaneously. What happens if you want to pause each iteration of the loop? This sounds easy enough, but you’ll have to address JavaScript’s scoping issues.

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JavaScript, Tutorials

Node.js Tutorial: Creating a Simple Application with Node, Express and MongoDB

October 29, 2014 by Koren Leslie Cohen

devise redirects

Node.js is tiny and wasn’t really meant to build websites, which is why frameworks like Express.js are useful. Express gives Node structure so you can build a functional website. Along with a templating engine such as Handlebars.js, Node can be used to build fully functional web applications.

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JavaScript

Traversing the DOM with jQuery

October 11, 2014 by Koren Leslie Cohen

front end engineer interview questions

If you do any front end development, you will have to navigate your DOM and properly target DOM elements. Several jQuery functions exist to traverse the DOM. Having a strong command of the most common traversal functions will speed up your development time immensely.

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JavaScript, Tutorials

Handlebars.js Tutorial: Templating with Handlebars

October 5, 2014 by Koren Leslie Cohen

Templates are useful when building web applications by allowing you to easily display repeating data. Handlebars.js is a templating engine that allows you to take repeating data and display it in an organized fashion.

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JavaScript, Tutorials

Backbone.js Tutorial: Getting Started with Backbone

September 28, 2014 by Koren Leslie Cohen

backbone

Step by step Backbone.js tutorial to help you get started with Backbone, a lightweight JavaScript framework designed to give structure to web applications. (Featured in JavaScript Weekly.)

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JavaScript

JavaScript Objects & Prototypes

September 3, 2014 by Koren Leslie Cohen

javascript array methods

JavaScript data types include simple data types such as numbers, strings and booleans, and complex data types such as objects. An object is an unordered list of data stored in name-value pairs. Property values in an object may be of any data type, including arrays, functions and strings.

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