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Use null when comparing null/undefined

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for non-strict equals. Saves 2 gzipped bytes.


Former-commit-id: d387147685f95cf88a437e678c873181cbcb907f
This commit is contained in:
David Murdoch
2012-06-28 09:56:10 -04:00
parent 2c1ec5fe75
commit 00d1cc9bf8
2 changed files with 16 additions and 16 deletions
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14
lodash.js
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@@ -1128,7 +1128,7 @@
*/
function first(array, n, guard) {
if (array) {
return (n == undefined || guard) ? array[0] : slice.call(array, 0, n);
return (n == null || guard) ? array[0] : slice.call(array, 0, n);
}
}
@@ -1238,7 +1238,7 @@
if (!array) {
return [];
}
return slice.call(array, 0, -((n == undefined || guard) ? 1 : n));
return slice.call(array, 0, -((n == null || guard) ? 1 : n));
}
/**
@@ -1296,7 +1296,7 @@
function last(array, n, guard) {
if (array) {
var length = array.length;
return (n == undefined || guard) ? array[length - 1] : slice.call(array, -n || length);
return (n == null || guard) ? array[length - 1] : slice.call(array, -n || length);
}
}
@@ -1511,7 +1511,7 @@
if (!array) {
return [];
}
return slice.call(array, (n == undefined || guard) ? 1 : n);
return slice.call(array, (n == null || guard) ? 1 : n);
}
/**
@@ -2255,7 +2255,7 @@
* // => { 'flavor': 'chocolate', 'sprinkles': 'rainbow' }
*/
var defaults = createIterator(extendIteratorOptions, {
'inLoop': 'if (object[index] == undefined)' + extendIteratorOptions.inLoop
'inLoop': 'if (object[index] == null)' + extendIteratorOptions.inLoop
});
/**
@@ -2525,8 +2525,8 @@
// treat `+0` vs. `-0` as not equal
return a !== 0 || (1 / a == 1 / b);
}
// a strict comparison is necessary because `null == undefined`
if (a == undefined || b == undefined) {
// a strict comparison is necessary because `undefined == null`
if (a == null || b == null) {
return a === b;
}
// unwrap any wrapped objects