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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 16x 16x 16x 16x 16x 1x 1x 1x 1x | /**
* Invert each character in a `string` from upper to lower and vice versa.
*
* @param {String} string
* @return {String}
*/
function toInvertCase(string) {
var chars = string.split("");
for (var i = 0, char; (char = chars[i]); i++) {
if (!/[a-z]/i.test(char)) continue;
var upper = char.toUpperCase();
var lower = char.toLowerCase();
chars[i] = char == upper ? lower : upper;
}
return chars.join("");
}
export default toInvertCase;
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