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Hallelujah Optional chaining! solution in Clear category for Count Digits by sthtnr
import assert from 'assert'
// Arrow function does not supported yet lol
const realSolution = (text: string): number => text.match(/\d/g)?.length || 0
function countDigits(text: string): number {
return realSolution(text)
}
console.log('Example:')
console.log(countDigits('hi'))
// These "asserts" are used for self-checking
assert.equal(countDigits('hi'), 0)
assert.equal(countDigits('who is 1st here'), 1)
assert.equal(countDigits('my numbers is 2'), 1)
assert.equal(
countDigits(
'This picture is an oil on canvas ' +
'painting by Danish artist Anna ' +
'Petersen between 1845 and 1910 year'
),
8
)
assert.equal(countDigits('5 plus 6 is'), 2)
assert.equal(countDigits(''), 0)
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April 30, 2020