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What does -1 mean in numpy reshape?
...igure it out. And numpy will figure this by looking at the 'length of the array and remaining dimensions' and making sure it satisfies the above mentioned criteria
Now see the example.
z = np.array([[1, 2, 3, 4],
[5, 6, 7, 8],
[9, 10, 11, 12]])
z.shape
(3, 4)
Now trying to res...
How to find the sum of an array of numbers
Given an array [1, 2, 3, 4] , how can I find the sum of its elements? (In this case, the sum would be 10 .)
43 Answers
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how to permit an array with strong parameters
...k::Test::UploadedFile.
To declare that the value in params must be an array of permitted scalar values map the key to an empty array:
params.permit(:id => [])
In my app, the category_ids are passed to the create action in an array
"category_ids"=>["", "2"],
Therefore, when declarin...
Type-juggling and (strict) greater/lesser-than comparisons in PHP
...$b $a<$b $a<=$b $a>=$b $a==$b $a===$b
NULL(NULL) array() false false true true true false
NULL(NULL) bool(false) false false true true true false
NULL(NULL) float(0) false false true true true false
NULL(NU...
Java array reflection: isArray vs. instanceof
...es, you should use the instanceof operator to test whether an object is an array.
Generally, you test an object's type before downcasting to a particular type which is known at compile time. For example, perhaps you wrote some code that can work with a Integer[] or an int[]. You'd want to guard you...
Java: how to convert HashMap to array
I need to convert a HashMap<String, Object> to an array; could anyone show me how it's done?
12 Answers
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Is it possible to get all arguments of a function as single object inside that function?
...
Use arguments. You can access it like an array. Use arguments.length for the number of arguments.
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How can I check whether an array is null / empty?
I have an int array which has no elements and I'm trying to check whether it's empty.
13 Answers
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How to assign string to bytes array
I want to assign string to bytes array:
9 Answers
9
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Sort array of objects by object fields
How can I sort this array of objects by one of its fields, like name or count ?
19 Answers
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