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In Firebase, is there a way to get the number of children of a node without loading all the node dat
... entire set of data and then counts it client-side, which can be very slow for large amounts of data.
Firebase doesn't currently have a way to count children without loading data, but we do plan to add it.
For now, one solution would be to maintain a counter of the number of children and update it...
SQL update query using joins
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FYI this will NOT work in MySQL (different syntax)! For MySQL have a look at gcbenison's answer
– Sliq
Jan 17 '17 at 16:28
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Git, see a list of comments of my last N commits
...u want to use the command line you can use the --author=<your name>
For example: to see your last 5 commits
git log -n 5 --author=Salvador
If you want a simpler one line solution:
git log --oneline -n 5 --author=Salvador
Edited to add
If you like the single line version, try creating a...
Error-Handling in Swift-Language
...ummonDefaultDragon() throws -> Dragon
Note: there is no specification for type of error the function actually can throw. This declaration simply states that the function can throw an instance of any type implementing ErrorType or is not throwing at all.
2. Invoking function that may throw erro...
How do you attach and detach from Docker's process?
... backgrounds the process. It's not the same as detaching and carries a performance penalty.
– Zenexer
Mar 11 '18 at 23:27
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Correct way to detach from a container without stopping it
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+1 for baseimage-docker. It's great to know there's a template with advice about the hard parts of Docker.
– mtmacdonald
Aug 12 '14 at 15:59
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Callback on CSS transition
... can attach directly to the element with the transition.
Their example (reformatted to multiple lines):
box.addEventListener(
'webkitTransitionEnd',
function( event ) {
alert( "Finished transition!" );
}, false );
...
How to make connection to Postgres via Node.js
...s -D /usr/local/pgsql/data now how can I interact with this through node? For example, what would the connectionstring be, or how am I able to find out what it is.
...
What does the thread_local mean in C++11?
...riables are visible to all the threads but can only modified by the thread for which they are defined? Is it correct?
3 A...
How to sort mongodb with pymongo
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So if you want to sort by, let's say, id then you should .sort("_id", 1)
For multiple fields:
.sort([("field1", pymongo.ASCENDING), ("field2", pymongo.DESCENDING)])
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