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printerError.js
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printerError.js
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/*
In a factory a printer prints labels for boxes. For one kind of boxes the printer has to use colors which, for the sake of simplicity, are named with letters from a to m.
The colors used by the printer are recorded in a control string. For example a "good" control string would be aaabbbbhaijjjm meaning that the printer used three times color a, four times color b, one time color h then one time color a...
Sometimes there are problems: lack of colors, technical malfunction and a "bad" control string is produced e.g. aaaxbbbbyyhwawiwjjjwwm with letters not from a to m.
You have to write a function printer_error which given a string will return the error rate of the printer as a string representing a rational whose numerator is the number of errors and the denominator the length of the control string. Don't reduce this fraction to a simpler expression.
The string has a length greater or equal to one and contains only letters from ato z.
first I need to assign a var with zero to sum
then I need to for loop over the length of the parameter
*/
const printerError = (s) => {
var sum = 0;
for (let i = 0; i < s.length; i++) {
if (s[i] > "m") {
sum++;
}
}
return `${sum}/${s.length}`;
};
console.log(printerError("aaaxbbbbyyhwawiwjjjwwm"));