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1-liner: solution in Creative category for All Upper I by --Serial_Sniper--
import assert from "assert";
function isAllUpper(text: string): boolean { return text == text.toUpperCase(); }
console.log('Example:');
console.log(isAllUpper('ALL UPPER'));
// These "asserts" are used for self-checking
assert.equal(isAllUpper('ALL UPPER'), true);
assert.equal(isAllUpper('all lower'), false);
assert.equal(isAllUpper('mixed UPPER and lower'), false);
assert.equal(isAllUpper(''), true);
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June 5, 2020
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