RosettaCodeData/Task/Roman-numerals-Decode/JavaScript/roman-numerals-decode-4.js

32 lines
737 B
JavaScript

(function (lstTest) {
function romanValue(s) {
return s.length ? function () {
var parse = [].concat.apply([], glyphs.map(function (g) {
return 0 === s.indexOf(g) ? [trans[g], s.substr(g.length)] : [];
}));
return parse[0] + romanValue(parse[1]);
}() : 0;
}
var trans = {
M: 1E3,
CM: 900,
D: 500,
CD: 400,
C: 100,
XC: 90,
L: 50,
XL: 40,
X: 10,
IX: 9,
V: 5,
IV: 4,
I: 1
},
glyphs = Object.keys(trans);
return lstTest.map(romanValue);
})(["MCMXC", "MDCLXVI", "MMVIII", "MMMM"]);