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Using the Grid Shepherd Technique to Order Data with CSS

Shepherds are good at tending to their sheep, bringing order and structure to their herds. Even if there are hundreds of those wooly animals, a shepherd still herds them back to the farm at the end of the day.

When dealing with data, programmers often don't know if it is correctly filtered or sorted. This is especially painful when iterating over an array then displaying the data on a site without knowing the locations of each element receiving it. The … Read article

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An Illustrated (and Musical) Guide to Map, Reduce, and Filter Array Methods

Map, reduce, and filter are three very useful array methods in JavaScript that give developers a ton of power in a short amount of space. Let’s jump right into how you can leverage (and remember how to use!) these super handy methods.… Read article

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Does it mutate?

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Understanding the Almighty Reducer

I was recently mentoring someone who had trouble with the .reduce() method in JavaScript. Namely, how you get from this:

const nums = [1, 2, 3]
let value = 0

for (let i = 0; i < nums.length; i++) {
  value += nums[i]
}

...to this:

const nums = [1, 2, 3]
const value = nums.reduce((ac, next) => ac + next, 0)

They are functionally equivalent and they both sum up all the numbers in the array, but there is … Read article

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