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Avoid changes to object affecting the result of a match function.

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This commit is contained in:
John-David Dalton
2014-07-08 09:33:27 -07:00
parent d0333134d5
commit 225c8871f9
2 changed files with 28 additions and 8 deletions
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20
lodash.js
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@@ -8524,14 +8524,17 @@
* // => { 'name': 'barney', 'age': 36 }
*/
function matches(source) {
var props = keys(source),
propsLength = props.length,
key = props[0],
value = propsLength && source[key];
var keyVals = pairs(source),
keyValsLength = keyVals.length;
if (keyValsLength) {
var keyVal = keyVals[0],
key = keyVal[0],
value = keyVal[1];
}
// fast path the common case of providing an object with a single
// property containing a primitive value
if (propsLength == 1 && value === value && !isObject(value)) {
if (keyValsLength == 1 && value === value && !isObject(value)) {
return function(object) {
if (object == null) {
return false;
@@ -8542,14 +8545,15 @@
};
}
return function(object) {
var length = propsLength;
var length = keyValsLength;
if (length && object == null) {
return false;
}
while (length--) {
var key = props[length];
keyVal = keyVals[length];
key = keyVal[0];
if (!(hasOwnProperty.call(object, key) &&
baseIsEqual(source[key], object[key], null, true))) {
baseIsEqual(keyVal[1], object[key], null, true))) {
return false;
}
}