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Short-circuit evaluation and return for && || #15

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Short-circuit evaluation and return for && || #15

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Short-circuit evaluation and return for && | |
Sep 13, 2019
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Sep 13, 2019
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12 changes: 12 additions & 0 deletions Javascript/2-logical-operators.js
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,12 @@ console.log('Mix of Tea AND Juice is ' + goodDrinks);
console.log('Mix of Vodka AND Beer is ' + badDrinks);
console.log('Mix of Vodka AND Juice is ' + badMix);

const logicalAndFirstFalse = 'string' && 0 && 10; // 0
console.log('\'string\' && 0 && 10 => ' + logicalAndFirstFalse);

const logicalAndLastTrue = 'string' && 5 && 10; // 10
console.log('\'string\' && 5 && 10 => ' + logicalAndLastTrue);

const engine1 = true;
const engine2 = false;

Expand All @@ -27,6 +33,12 @@ console.log('The first engine works? - ' + engine1);
console.log('The second engine works? - ' + engine2);
console.log('Is the plane still flying? - ' + fly);

const logicalOrFirstTrue = 'string' || 0 || 10; // 'string'
console.log('\'string\' || 0 || 10 => ' + logicalOrFirstTrue);

const logicalOrLastFalse = '' || null || 0; // 0
console.log('\'\' || null || 0 => ' + logicalOrLastFalse);

const happy = true;

const mood = !happy; // false
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