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Mongodb Explain for Aggregation framework
...ve you the desired results (documentation here).
For older versions >= 2.6, you will need to use the explain option for aggregation pipeline operations
explain:true
db.collection.aggregate([
{ $project : { "Tags._id" : 1 }},
{ $unwind : "$Tags" },
{ $match: {$or: [{"Tags._id":"tag1...
Declaring and initializing variables within Java switches
...he right in the local variable declaration statement.
In your case, case 2 is in the same block as case 1 and appears after it, even though case 1 will never execute... so the local variable is in scope and available for writing despite you logically never "executing" the declaration. (A declarati...
How do I start Mongo DB from Windows?
...starting. It is showing admin web console waiting for connections on port 28017 .
17 Answers
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How do I convert a git repository to mercurial?
...
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edited Sep 2 '17 at 7:01
aditsu quit because SE is EVIL
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...
Storyboard doesn't contain a view controller with identifier
...
245
Just for future reference:
I'm developing on iOS 6 using Storyboards.
I was having the same ...
'python' is not recognized as an internal or external command [duplicate]
So I have recently installed Python Version 2.7.5 and I have made a little loop thing with it but the problem is, when I go to cmd and type python testloop.py I get the error:
...
When should you NOT use a Rules Engine? [closed]
...
community wiki
2 revs, 2 users 86%duffymo
1
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How does the following LINQ statement work?
...
235
The output is 2,4,6,8 because of deferred execution.
The query is actually executed when t...
Change the URL in the browser without loading the new page using JavaScript
...: "bar" };
function change_my_url()
{
history.pushState(stateObj, "page 2", "bar.html");
}
var link = document.getElementById('click');
link.addEventListener('click', change_my_url, false);
</script>
and a href:
<a href="#" id='click'>Click to change url to bar.html</a>
I...