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How to send a message to a particular client with socket.io
...'m starting with socket.io + node.js, I know how to send a message locally and to broadcast socket.broadcast.emit() function:- all the connected clients receive the same message.
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How to transfer some data to another Fragment?
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And if you have an existing fragment in memory?
– powder366
Nov 17 '16 at 18:43
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Mongod complains that there is no /data/db folder
..., e.g. sudo mkdir -p /data/db
Or you need to do su - to become superuser, and then create the directory with mkdir -p /data/db
Note:
MongoDB also has an option where you can create the data directory in another location, but that's generally not a good idea, because it just slightly complicate...
findViewById in Fragment
...mentation states that onActivityCreated() is the recommended place to find and store references to your views. You must clean up these stored references by setting them back to null in onDestroyView() or you will leak the Activity.
– Monstieur
Jun 5 '14 at 15:1...
Is a one column table good design? [closed]
...m. Maybe you just want a list of possibilities to display for some reason and you want to be able to dynamically change it, but have no need to link it to another table.
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@RequestParam in Spring MVC handling optional parameters
Is it possible for a Spring controller to handle both kind of requests?
3 Answers
3
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How to sort an array of objects by multiple fields?
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Update: Here is an "optimized" version. It does a lot more preprocessing and creates a comparison function for each sorting option beforehand. It might need more more memory (as it stores a function for each sorting option, but it should preform a bit better as it does not have to determine the co...
Update MongoDB field using value of another field
...ion 4.2+ which allows using of aggregation pipeline in the update document and the updateOne, updateMany or update collection method. Note that the latter has been deprecated in most if not all languages drivers.
MongoDB 4.2+
Version 4.2 also introduced the $set pipeline stage operator which is an...
Vagrant ssh authentication failure
...lic key to ~/.ssh/authorized_keys on the Vagrant VM. You can do it by copy-and-pasting or using a tool like ssh-copy-id (user: root password: vagrant port: 2222) ssh-copy-id '-p 2222 root@127.0.0.1'
If still does not work try this:
Remove insecure_private_key file from c:\Users\USERNAME\.vagrant...
PopupWindow - Dismiss when clicked outside
...with my activity (say scrolling on my list). I can scroll through my list and the PopupWindow is still there.
15 Answers
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