We have to write a function that takes in a string as one and only argument, and return its equivalent number.
For example −
one five seven eight -------> 1578 Two eight eight eight -------> 2888
This one is pretty straightforward; we iterate over the array of words splitted by whitespace and keep adding the appropriate number to the result.
The code for doing this will be −
Example
const wordToNum = (str) => {
const legend = ['zero', 'one', 'two', 'three', 'four', 'five', 'six','seven', 'eight', 'nine'];
return str.toLowerCase().split(" ").reduce((acc, val) => {
const index = legend.indexOf(val);
return (acc*10 + index);
}, 0);
};
console.log(wordToNum('one five six eight'));
console.log(wordToNum('zero zero two zero eight'));
console.log(wordToNum('eight six seven five'));Output
The output in the console will be −
1568 208 8675