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const numbers = [ 2, 4, 8, 9 ] | |
const addTwo = number => number + 1 | |
const isMoreThan5 = number => number > 5 | |
const result = | |
//numbers.filter(isMoreThan5) | |
filterArray(isMoreThan5, numbers) | |
//mapArray(addTwo, numbers | |
result | |
function filterArray(predicate, array) { | |
let filteredArray = [] | |
for(let i = 0; i < array.length; i++) { | |
const currentItem = array[i] | |
if(predicate(currentItem)) { | |
filteredArray.push(currentItem) | |
} | |
} | |
return filteredArray | |
} | |
function mapArray(transform, array) { | |
let transformedArray = [] | |
for(let i = 0; i < array.length; i++) { | |
transformedArray.push(transform(array[i])) | |
} | |
return transformedArray | |
} |
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