079-is-the-string-uppercase.js

// Is the string uppercase?

// Task

// Create a method is_uppercase() to see whether the string is ALL CAPS. For
// example:

// is_uppercase("c") == False
// is_uppercase("C") == True
// is_uppercase("hello I AM DONALD") == False
// is_uppercase("HELLO I AM DONALD") == True
// is_uppercase("ACSKLDFJSgSKLDFJSKLDFJ") == False
// is_uppercase("ACSKLDFJSGSKLDFJSKLDFJ") == True
// Corner Cases

// For simplicity, you will not be tested on the ability to handle corner
// cases (e.g. "%*&#()%&^#" or similar strings containing alphabetical
// characters at all) - an ALL CAPS (uppercase) string will simply be defined
// as one containing no lowercase letters. Therefore, according to this
// definition, strings with no alphabetical characters (like the one above)
// should return True.

String.prototype.isUpperCase = function() {
  return !/[a-z]/.test(this);
}