Run results for: isUpperCase

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8

Browser: Safari 10

Operating system: Mac OS X 10.11.6

Device Platform: Other

Date tested: 7 years ago

Tests:

char code
var isUpperCase = c => 'A' <= c && c <= 'Z'; for(c = 0; c < 128; c++) { isUpperCase(String.fromCharCode(c)); }
regex
var isUpperCase = c => /[A-Z]/.test(c); for(c = 0; c < 128; c++) { isUpperCase(String.fromCharCode(c)); }
toLowerCase
var isUpperCase = c => c !== c.toLowerCase(); for(c = 0; c < 128; c++) { isUpperCase(String.fromCharCode(c)); }
char code 2
var isUpperCase = c => { d = c.charCodeAt(); return 64 < d && d < 91; } for(c = 0; c < 128; c++) { isUpperCase(String.fromCharCode(c)); }