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strictEquals.js
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// Your scientists were so preoccupied | |
// with whether or not they could, | |
// they didn't stop to think if they should. | |
// Like a === b | |
function strictEquals(a, b) { | |
if (Object.is(a, b)) { | |
// Same value. | |
// Is this NaN? | |
if (Object.is(a, NaN)) { // We already know a and b are the same, so it's enough to check a. | |
// Special case #1. | |
return false; | |
} else { | |
// They are equal! | |
return true; | |
} | |
} else { | |
// Different value. | |
// Are these 0 and -0? | |
if ( | |
(Object.is(a, 0) && Object.is(b, -0)) || | |
(Object.is(a, -0) && Object.is(b, 0)) | |
) { | |
// Special case #2. | |
return true; | |
} else { | |
// They are not equal! | |
return false; | |
} | |
} | |
} |
Saran-73
commented
Jul 5, 2024
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