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Get names of all keys in the collection
I'd like to get the names of all the keys in a MongoDB collection.
21 Answers
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Is it possible to have empty RequestParam values use the defaultValue?
if I have a a request mapping similar to the following:
5 Answers
5
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IOException: read failed, socket might closed - Bluetooth on Android 4.3
Currently I am trying to deal with a strange Exception when opening a BluetoothSocket on my Nexus 7 (2012), with Android 4.3 (Build JWR66Y, I guess the second 4.3 update). I have seen some related postings (e.g. https://stackoverflow.com/questions/13648373/bluetoothsocket-connect-throwing-exception...
How to force a view refresh without having it trigger automatically from an observable?
Note: this is mostly for debugging and understanding KnockoutJS.
3 Answers
3
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Is it possible to run a single test in MiniTest?
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I'm looking for similar functionality to rspec path/to/file.rb -l 25
Yup! Use Nick Quaranto's "m" gem. With it you can say:
m spec/my_spec.rb:25
sh...
What to do Regular expression pattern doesn't match anywhere in string?
I am trying to match <input> type “hidden” fields using this pattern:
8 Answers
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nginx upload client_max_body_size issue
I'm running nginx/ruby-on-rails and I have a simple multipart form to upload files.
Everything works fine until I decide to restrict the maximum size of files I want uploaded.
To do that, I set the nginx client_max_body_size to 1m (1MB) and expect a HTTP 413 (Request Entity Too Large) status in...
What is the argument for printf that formats a long?
The printf function takes an argument type, such as %d or %i for a signed int . However, I don't see anything for a long value.
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Drawing an SVG file on a HTML5 canvas
Is there a default way of drawing an SVG file onto a HTML5 canvas? Google Chrome supports loading the SVG as an image (and simply using drawImage ), but the developer console does warn that resource interpreted as image but transferred with MIME type image/svg+xml .
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Insert, on duplicate update in PostgreSQL?
Several months ago I learned from an answer on Stack Overflow how to perform multiple updates at once in MySQL using the following syntax:
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