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1. streams.js streams.js

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   function nums(n = 1) {

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     return { first: n, rest: () => nums(n + 1) };

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   }

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   nums().first;  // => 1

2. Linked list reverser Linked list reverser

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   function reverseList(input, accumulator) {

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     var reversed = { 

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       id: input.id, 

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       next: accumulator || null 

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     };

3. PersistentObject.class.js PersistentObject.class.js

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   export default class PersistentObject {

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     constructor(name, contents) {

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       this._validateContents(contents);

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       this.name = name;

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       this.contents = contents;

4. PlantUML skinparams PlantUML skinparams

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   @startuml

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     ' Basic styles that improve on defaults

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     skinparam BackgroundColor Bisque

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     skinparam NoteBorderColor DeepSkyBlue

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     skinparam ArrowColor Navy

5. Fisher–Yates shuffle Fisher–Yates shuffle

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   // Great explanation https://bost.ocks.org/mike/shuffle/

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   // This relies on mutation. Could the algorithm be recreated using immutable data?

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   function shuffle(array) {

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     var count = array.length

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     while (count) {