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algorithm: reverse #1197

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Merged
merged 10 commits into from
Oct 20, 2022
Merged

algorithm: reverse #1197

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f114ca7
New implementation InvertArray
SczSca Oct 15, 2022
2b259a5
New implementation: InvertArray
SczSca Oct 15, 2022
6338ad2
Invert Array Data Structures
SczSca Oct 17, 2022
5c3058e
Invert Array Data-Structures
SczSca Oct 17, 2022
bf8097d
Reverse array function
SczSca Oct 18, 2022
8e62fb6
leaving just jest-each on .test.js
SczSca Oct 18, 2022
b3ce92f
reverse function
SczSca Oct 18, 2022
31c8ab5
eliminate extra blank line in .test.js
SczSca Oct 18, 2022
378a51d
name file change to Reverse.js
SczSca Oct 18, 2022
2c15ab1
name changed to Reverse.test.js
SczSca Oct 18, 2022
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17 changes: 17 additions & 0 deletions Data-Structures/Array/Reverse.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
/** https://www.geeksforgeeks.org/write-a-program-to-Reverse-an-array-or-string/
* This function will accept an array and
* Reverse its elements and returns the inverted array
* @param {Array} arr array with elements of any data type
* @returns {Array} array with inverted elements
*/

const Reverse = (arr) => {
// limit specifies the amount of Reverse actions
for (let i = 0, j = arr.length - 1; i < arr.length / 2; i++, j--) {
const temp = arr[i]
arr[i] = arr[j]
arr[j] = temp
}
return arr
}
export { Reverse }
13 changes: 13 additions & 0 deletions Data-Structures/Array/test/Reverse.test.js
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import { Reverse } from '../Reverse.js'
import each from 'jest-each'

describe('reverse elements in an array', () => {
each`
array | expected
${[]} | ${[]}
${[1]} | ${[1]}
${[1, 2, 3, 4]} | ${[4, 3, 2, 1]}
`.test('returns $expected when given $array', ({ array, expected }) => {
expect(Reverse(array)).toEqual(expected)
})
})