Taken from Execute Program
Write a
doubleNumberstemplate literal tag. It mimics normal string interpolation, but doubles all of the interpolated values as they’re inserted.
Solution
This is the answer I came up with using JavaScript:
/**
* @param {TemplateStringsArray} strings
* @param {number[]} values
* @return {string}
*/
function doubleNumbers(strings, ...values) {
let result = '';
for (let i=0; i<strings.length; i++) {
result += strings[i]
if (values[i]) {
result += (values[i] * 2).toString()
}
}
return result
}
console.log(
doubleNumbers`the numbers ${1} and ${2}` // 'the numbers 2 and 4'
)