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Add check vowels algorithm #433

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Merged
itsvinayak merged 2 commits into from
Oct 10, 2020
Merged

Add check vowels algorithm #433

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7dfcfef
Merge pull request #1 from TheAlgorithms/master
josecarlosweb Oct 7, 2020
b34ab27
Added new algoritm
josecarlosweb Oct 7, 2020
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21 changes: 21 additions & 0 deletions String/CheckVowels.js
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Original file line number Diff line number Diff line change
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/*
Given a string of words or phrases, count the number of vowels.
Example: input = "hello world" return 3
*/

const checkVowels = (value) => {
if (typeof value !== 'string') {
throw new TypeError('The first param should be a string')
}
const vowels = ['a', 'e', 'i', 'o', 'u']
let countVowels = 0
for (let i = 0; i < value.length; i++) {
const char = value[i].toLowerCase()
if (vowels.includes(char)) {
countVowels++
}
}
return countVowels
}

export { checkVowels }
12 changes: 12 additions & 0 deletions String/CheckVowels.test.js
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import { checkVowels } from './CheckVowels'

describe('Test the checkVowels function', () => {
it('expect throws on use wrong param', () => {
expect(() => checkVowels(0)).toThrow()
})
it('count the vowels in a string', () => {
const value = 'Mad World'
const countVowels = checkVowels(value)
expect(countVowels).toBe(2)
})
})