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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
...Ref.transaction(function (current_value) {
return (current_value || 0) + 1;
});
For more info, see https://www.firebase.com/docs/transactions.html
UPDATE:
Firebase recently released Cloud Functions. With Cloud Functions, you don't need to create your own Server. You can simply write JavaScript ...
How do I delete specific lines in Notepad++?
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edited Nov 18 '15 at 21:23
Peter Mortensen
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Insert image after each list item
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answered Jun 3 '09 at 18:46
jimyijimyi
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Sending an HTTP POST request on iOS
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The following code describes a simple example using POST method.(How one can pass data by POST...
PostgreSQL: Difference between text and varchar (character varying)
...array).
Check this article from Depesz: http://www.depesz.com/index.php/2010/03/02/charx-vs-varcharx-vs-varchar-vs-text/
A couple of highlights:
To sum it all up:
char(n) – takes too much space when dealing with values shorter than n (pads them to n), and can lead to subtle errors be...
How does the MapReduce sort algorithm work?
...uce sort, except for a custom partitioner that uses a sorted list of N − 1 sampled keys that define the key range for each reduce. In particular, all keys such that sample[i − 1] <= key < sample[i] are sent to reduce i. This guarantees that the output of reduce i are all less than the outp...
How can I round down a number in Javascript?
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Could not load type from assembly error
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Is the assembly in the Global Assembly Cache (GAC) or any place the might be overriding the as...
mysql_config not found when installing mysqldb python interface
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How can I configure my makefile for debug and release builds?
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You can use Target-specific Variable Values. Example:
CXXFLAGS = -g3 -gdwarf2
CCFLAGS = -g3 -...