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re.test solution in Clear category for Count Digits by Sim0000
import assert from "assert";
function countDigits(text: string): number {
let count = 0;
for(const c of text){
if(/[0-9]/.test(c)) count++;
}
return count;
}
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 24, 2020
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