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JavaScript blogs

Comprehensive guides to mastering JavaScript and beyond.

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Use .indexOf() to find a String in a String in JavaScript

Learn how to find a string inside a string using indexOf in JavaScript, combined with the bitwise operator and looking at -1 results.

Todd Motto

Todd Motto

Apr 14, 2020

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Exploring Array ForEach in JavaScript

Array ForEach is the entry-level loop tool that will iterate over your array and pass you each value (and its index). You could render the data to ...

Todd Motto

Todd Motto

Apr 9, 2020

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Exploring Array Reduce in JavaScript

Array Reduce is the most misunderstood array method! Pay close attention to the little details and you’ll succeed with Reduce. The concept of Reduc...

Todd Motto

Todd Motto

Apr 8, 2020

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Exploring Array Find in JavaScript

Array Find searches your array and returns you the first matching element, or undefined. Find’s return value is dynamic and could be of any JavaScr...

Todd Motto

Todd Motto

Apr 6, 2020

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Exploring Array Every in JavaScript

Array Every tells you whether every element in your array passes your test. If every element passes, Every returns true. If just one element in the...

Todd Motto

Todd Motto

Apr 5, 2020

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Exploring Array Some in JavaScript

Array Some tells you whether any element in your array passes your test. If one element passes then Array Some returns true. Some will return false...

Todd Motto

Todd Motto

Mar 26, 2020

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Exploring Array Filter in JavaScript

Array Filter allows us to conditionally return certain elements from our array, into a new array. It’s commonly used to remove items from an array ...

Todd Motto

Todd Motto

Mar 25, 2020

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Exploring Array Map in JavaScript

Array Map allows us to loop our array, access each value and return a new value for each iteration - which in turn creates a new array.

Todd Motto

Todd Motto

Mar 24, 2020

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Removing Items from an Array in JavaScript

In this article, we’ll explore a few different ways to remove an item from an array in JavaScript. I will also show you mutable and immutable opera...

Todd Motto

Todd Motto

Mar 12, 2020

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Getting the Value of Checked Radio Buttons

In this post you’ll learn a few ways to get the selected value of a radio input (<input type="radio">) and look at different ways of achievin...

Todd Motto

Todd Motto

Feb 18, 2020

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How to Transform FormData into a Query String

“How do I turn FormData into a query string?” you ask. This typically involves what we would call “serializing” your data.

Todd Motto

Todd Motto

Feb 14, 2020