Mirrors/lodash
1
0
Fork 0
mirror of https://github.com/whoisclebs/lodash.git synced 2026-02-03 16:47:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

_.isEqual improvements

Browse Source
This commit is contained in:
Michael Ficarra
2011-07-15 18:15:10 -04:00
parent a12d0035cb
commit c7c57ca6ff
2 changed files with 17 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
underscore.js
View File

@@ -606,29 +606,27 @@
// The type comparison above prevents unwanted type coercion.
if (a == b) return true;
// Optimization; ensure that both values are truthy or falsy.
if ((!a && b) || (a && !b)) return false;
if (!a != !b) return false;
// `NaN` values are equal.
if (_.isNaN(a)) return _.isNaN(b);
// Compare dates by their millisecond values.
var isDateA = _.isDate(a), isDateB = _.isDate(b);
if (isDateA || isDateB) return isDateA && isDateB && a.getTime() == b.getTime();
if (_.isDate(a)) return _.isDate(b) && a.getTime() == b.getTime();
// Compare RegExps by their source patterns and flags.
var isRegExpA = _.isRegExp(a), isRegExpB = _.isRegExp(b);
if (isRegExpA || isRegExpB) return isRegExpA && isRegExpB &&
a.source == b.source &&
a.global == b.global &&
a.multiline == b.multiline &&
a.ignoreCase == b.ignoreCase;
if (_.isRegExp(a))
return _.isRegExp(b) &&
a.source == b.source &&
a.global == b.global &&
a.multiline == b.multiline &&
a.ignoreCase == b.ignoreCase;
// Ensure that both values are objects.
if (typeA != 'object') return false;
// Unwrap any wrapped objects.
if (a._chain) a = a._wrapped;
if (b._chain) b = b._wrapped;
// Invoke a custom `isEqual` method if one is provided.
if (a.isEqual) return a.isEqual(b);
if (b.isEqual) return b.isEqual(a);
if (typeof a.isEqual == 'function') return a.isEqual(b);
// Compare array lengths to determine if a deep comparison is necessary.
if (a.length && (a.length !== b.length)) return false;
if ('length' in a && (a.length !== b.length)) return false;
// Assume equality for cyclic structures.
var length = stack.length;
while (length--) {