Tricky Outputs — Series 3

Preview — 3 of 10 questions

What is logged?

javascript

const o = Object.seal({ a: 1, nested: { b: 2 } });

o.a = 9;
delete o.a;
o.nested.b = 9;
o.c = 1;

console.log(o.a, o.nested.b, 'c' in o, Object.isSealed(o));

A9 9 false true

B1 2 false true

C9 9 true true

Dundefined 9 false true

What is logged?

javascript

const n = [1, 5, 10, 2];

const bad = [...n].sort((a, b) => a > b);
const good = [...n].sort((a, b) => a - b);

console.log(bad.join(','), good.join(','));

A1,2,5,10 and 1,2,5,10

B10,5,2,1 and 1,2,5,10

C1,5,10,2 and 1,2,5,10

D1,10,2,5 and 1,2,5,10

What is logged?

javascript

const tag = (s, ...v) => s.raw.join('|') + '#' + v.join(',');

console.log(tag`a\nb${1}c${2}`);

Aa<newline>b|c|#1,2

Ba\nb|c|#1,2

Ca\nb|c|1,2#

Da\nbc#12

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