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Improve speed of $.map with object support (-5% previous speed) and improve .length detection

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This commit is contained in:
Dan Heberden 2011-04-04 23:59:54 -07:00
parent 00dd6013b6
commit c72371f714
4 changed files with 11 additions and 12 deletions
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15
src/core.js
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@ -704,16 +704,15 @@ jQuery.extend({
return ret;
},
// arg is for internal usage only
// arg is for internal usage only
map: function( elems, callback, arg ) {
var value, ret = [],
i = 0,
i = 0,
length = elems.length,
// process .length if it's just an object member
isArray = length !== undefined && ( elems[ length - 1 ] || jQuery.isArray( elems ) );
// jquery objects are treated as arrays
isArray = elems instanceof jQuery || length !== undefined && typeof length === "number" && ( ( length > 0 && elems[ 0 ] && elems[ length -1 ] ) || jQuery.isArray( elems ) ) ;
// Go through the array, translating each of the items to their
// new value (or values).
if ( isArray ) {
for ( ; i < length; i++ ) {
value = callback( elems[ i ], i, arg );
@ -723,8 +722,8 @@ jQuery.extend({
}
}
// Go thorugh every key on the object,
} else {
// Go thorugh every key on the object,
} else {
for ( key in elems ) {
value = callback( elems[ key ], key, arg );

2
src/sizzle

@ -1 +1 @@
Subproject commit ef19279f54ba49242c6461d47577c703f4f4e80e
Subproject commit f12b9309269ba7e705a99efe099f86ed1fe98d58

2
test/qunit

@ -1 +1 @@
Subproject commit cc8460c7b44f023c4f84ab1810b72bf6c6ee4542
Subproject commit d404faf8f587fcbe6b8907943022e6318dd51e0c

4
test/unit/core.js
View File

@ -625,7 +625,7 @@ test("map()", function() {
q("ap","ap","ap"),
"Single Map"
);
//for #2616
var keys = jQuery.map( {a:1,b:2}, function( v, k ){
return k;
@ -636,7 +636,7 @@ test("map()", function() {
return v;
});
equals( values.join(""), "12", "Map the values from a hash to an array" );
// object with length prop
var values = jQuery.map( {a:1,b:2, length:3}, function( v, k ){
return v;