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How do I perform the SQL Join equivalent in MongoDB?
How do I perform the SQL Join equivalent in MongoDB?
19 Answers
19
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MySQL - UPDATE query based on SELECT Query
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The first form (update with join) is going to be a lot more efficient than the second. The first would do a single join, whereas the second would execute the select query for every row of tableA.
– ColinM
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Get value when selected ng-option changes
... data-ng-options="blisterPackTemplate as blisterPackTemplate.name for blisterPackTemplate in blisterPackTemplates">
<option value="">Select Account</option>
</select>
{{itemList}}
</div>
</div>
js:
function ctrl($scope) {
$sc...
How do I kill all the processes in Mysql “show processlist”?
...use I see a lot of processes there, and the "time" column shows big values for all of them.
23 Answers
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List of lists changes reflected across sublists unexpectedly
...e that you create a new list at each position. One way to do it is
[[1]*4 for _ in range(3)]
which will reevaluate [1]*4 each time instead of evaluating it once and making 3 references to 1 list.
You might wonder why * can't make independent objects the way the list comprehension does. That's ...
How can I verify a Google authentication API access token?
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For user check, just post
get the access token as accessToken and post it and get the response
https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=accessToken
you can try in address bar in browsers too, use httppos...
How to fetch the row count for all tables in a SQL SERVER database [duplicate]
I am searching for a SQL Script that can be used to determine if there is any data (i.e. row count) in any of the tables of a given database.
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Handling a Menu Item Click Event - Android
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simple code for creating menu..
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.game_menu, menu);
return true;
}
simple code for menu selected
@...
How to extract the decision rules from scikit-learn decision-tree?
... feature_names[i] if i != _tree.TREE_UNDEFINED else "undefined!"
for i in tree_.feature
]
print "def tree({}):".format(", ".join(feature_names))
def recurse(node, depth):
indent = " " * depth
if tree_.feature[node] != _tree.TREE_UNDEFINED:
name = f...
GCM with PHP (Google Cloud Messaging)
...ray('message' => 'Hello World!');
// The recipient registration tokens for this notification
// https://developer.android.com/google/gcm/
$ids = array('abc', 'def');
// Send push notification via Google Cloud Messaging
sendPushNotification($data, $ids);
function sendPushNotification($data,...