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how to exclude null values in array_agg like in string_agg using postgres?
If I use array_agg to collect names, I get my names separated by commas, but in case there is a null value, that null is also taken as a name in the aggregate. For example :
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How to create an array for JSON using PHP?
From PHP code I want to create an json array:
10 Answers
10
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JavaScript: Passing parameters to a callback function
...ailable
Function.prototype.bind = function(){
var fn = this, args = Array.prototype.slice.call(arguments),
object = args.shift();
return function(){
return fn.apply(object,
args.concat(Array.prototype.slice.call(arguments)));
};
};
}
Example
bind() - Pr...
Read and parse a Json File in C#
... with code samples and etc., trying to read a very large JSON file into an array in c# so I can later split it up into a 2d array for processing.
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initialize a numpy array
Is there way to initialize a numpy array of a shape and add to it? I will explain what I need with a list example. If I want to create a list of objects generated in a loop, I can do:
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Do Java arrays have a maximum size?
Is there a limit to the number of elements a Java array can contain? If so, what is it?
9 Answers
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How to add new elements to an array?
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The size of an array can't be modified. If you want a bigger array you have to instantiate a new one.
A better solution would be to use an ArrayList which can grow as you need it. The method ArrayList.toArray( T[] a ) gives you back your a...
string.Join on a List or other type
I want to turn an array or list of ints into a comma delimited string, like this:
7 Answers
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TypeError: 'str' does not support the buffer interface
...en switching from py2 to py3. In py2 plaintext is both a string and a byte array type. In py3 plaintext is only a string, and the method outfile.write() actually takes a byte array when outfile is opened in binary mode, so an exception is raised. Change the input to plaintext.encode('utf-8') to fix ...
How can I explicitly free memory in Python?
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I need to load and process several numpy arrays of 25GB in a system with 32GB memory. Using del my_array followed by gc.collect() after processing the array is the only way the memory is actually released and my process survives to load the next array.
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