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//SET UP | |
const users = [{ | |
id: 1, | |
name: 'Bob', | |
schoolId: 101 | |
}, { | |
id: 2, | |
name: 'Jane', | |
schoolId: 999 |
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// Functional JS to flatten an array... | |
const flatten = (array) => { | |
return array.reduce((flat, toFlatten) => { | |
return flat.concat(Array.isArray(toFlatten) ? flatten(toFlatten) : toFlatten); | |
}, []); | |
} | |
console.log(flatten([[1,2,[3]],4])); |
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'use strict'; | |
/** | |
* Shape class. | |
* | |
* @constructor | |
* @param {String} id - The id. | |
* @param {Number} x - The x coordinate. | |
* @param {Number} y - The y coordinate. | |
*/ |
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function reverseString(str) { | |
return str.split('').reverse().join('') | |
} | |
console.log(reverseString('Hello')) | |
// Recursion | |
function reverseString(str) { | |
return (str === '') ? '' : reverseString(str.substr(1)) + str.charAt(0); |
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// Basic Recursion | |
const countDownFrom = (num) => { | |
if (num === 0) return | |
console.log(num) | |
countDownFrom(num - 1) | |
} | |
countDownFrom(10) |
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function LinkedList() { | |
this.head = null; | |
} | |
LinkedList.prototype.isEmpty = function() { | |
return this.head === null; | |
}; | |
LinkedList.prototype.size = function() { | |
var current = this.head; |
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var _ = {}; | |
/*********IDENTITY**********/ | |
_.identity = function(val) { | |
return val; | |
}; | |
/*********FIRST**********/ | |
_.first = function(array, n) { |
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Object.equals = (x, y) => { | |
if (x === y) return true; | |
if (!(x instanceof Object) || !(y instanceof Object)) return false; | |
if (x.constructor !== y.constructor) return false; | |
for (let p in x) { | |
if (!x.hasOwnProperty(p)) continue; | |
if (!y.hasOwnProperty(p)) return false; | |
if (x[p] === y[p]) continue; | |
if (typeof x[p] !== 'object') return false; |
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// Global | |
const numbers = [1, 2, 3, 4, 5, 6] | |
const number = (n) => { | |
return numbers[n] | |
} | |
console.log(number(4)) |
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Mark Williams | waffle iron | 80 | 2 | |
---|---|---|---|---|
Mark Williams | blender | 200 | 1 | |
Mark Williams | knife | 10 | 4 | |
Nikita Smith | waffle iron | 80 | 1 | |
Nikita Smith | knife | 10 | 2 | |
Nikita Smith | pot | 20 | 3 |
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