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_.isEqual: Ensure that an egal comparison is performed for number objects and primitives.

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Kit Cambridge
2011-10-26 11:35:49 -06:00
parent ed3c05e74c
commit 3d1605f241
2 changed files with 9 additions and 5 deletions
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12
underscore.js
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@@ -684,14 +684,16 @@
// equivalent to `new String("5")`.
return String(a) == String(b);
case '[object Number]':
case '[object Boolean]':
// Coerce numbers, dates, and booleans to numeric primitive values.
a = +a;
b = +b;
// `NaN`s are equivalent, but non-reflexive.
return a != a ? b != b : a == b;
// `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for
// other numeric values.
return a != a ? b != b : (a == 0 ? 1 / a == 1 / b : a == b);
case '[object Date]':
// Compare dates by their millisecond representations. Invalid dates are not equivalent.
case '[object Boolean]':
// Coerce dates and booleans to numeric primitive values. Dates are compared by their
// millisecond representations. Note that invalid dates with millisecond representations
// of `NaN` are not equivalent.
return +a == +b;
// RegExps are compared by their source patterns and flags.
case '[object RegExp]':