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| function(r) { | |
| var | |
| numerals = { // initialise the roman numeral values | |
| M:1000, | |
| D:500, | |
| C:100, | |
| L:50, | |
| X:10, | |
| V:5, | |
| I:1 | |
| }, | |
| curr, // current character's value | |
| comp = 0, // comparator | |
| total = 0, // ongoing total | |
| i = r.length; // length of string | |
| for (;i--;) { // iterate over array in reverse | |
| curr = numerals[r[i]]; // set the current character value | |
| total += // add to OR subtract from total... | |
| (curr >= comp // depending on wether the current value is greater than the comparator | |
| ? curr : -curr); | |
| comp = // set the comparator... | |
| (curr > comp // to the greater of either the... | |
| ? curr : comp); // current or comparator | |
| } | |
| return total; // return the total | |
| } |
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| function(a){var b={M:1e3,D:500,C:100,L:50,X:10,V:5,I:1},c,d=0,e=0,f=a.length;for(;f--;)c=b[a[f]],e+=c>=d?c:-c,d=c>d?c:d;return e} |
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| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE> | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 0. You just DO WHAT THE FUCK YOU WANT TO. |
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| { | |
| "name": "romanNumeralConverter", | |
| "description": "Convert from roman numerals to integer", | |
| "keywords": [ | |
| "romannumerals", | |
| "roman", | |
| "numerals", | |
| "converter" | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title></title> | |
| <script type="text/javascript"> | |
| var roman = function(a){var b={M:1e3,D:500,C:100,L:50,X:10,V:5,I:1},c,d=0,e=0,f=a.length;for(;f--;)c=b[a[f]],e+=c>=d?c:-c,d=c>d?c:d;return e} | |
| console.info(1804, roman("MCCMIV")); | |
| console.info(-1, roman("IIIIIIV")); | |
| </script> | |
| </head> | |
| <body> | |
| </body> | |
| </html> | |
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@subzey beat you to it: https://gist.github.com/1040240