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Type:
Bug
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Resolution: Won't Do
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Priority:
Minor - P4
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None
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Affects Version/s: 2.4.6
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Component/s: JavaScript
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Labels:
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Environment:CentOS 6.x. 3 shards, with replica sets.
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ALL
I have a javascript function which merges two objects recursively. I call it in a reduce() to merge documents and add their numbers. This function works fine on node.js, and in the Chrome console. (so it's not a v8 problem)
merge_and_sum_recursive_in_place = function(obj1, obj2) {
var k, v;
if (obj1 == null) {
return obj2;
}
if (obj2 == null) {
return obj1;
}
for (k in obj2) {
v = obj2[k];
if (v.constructor === Object) // THIS NEVER RETURNS TRUE
// if (typeof(v) === 'object') { // THIS WORKS
obj1[k] = merge_and_sum_recursive_in_place(obj1[k], v);
} else {
if (obj1[k] != null) {
if (v.constructor === Number) { // THIS WORKS
obj1[k] += v;
} else {
obj1[k] = v;
}
} else {
obj1[k] = v;
}
}
}
return obj1;
};
All the numbers in the subdocuments are never added if I use "v.constructor === Object", but it works fine if I use "typeof(v) === 'object'".
Note that "v.constructor === Number" works perfectly.
Perhaps subdocument objects parsed from BSON are not "real" javascript "Object"s ?