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Sorting an array of objects in Ruby by object attribute?
I have an array of objects in Ruby on Rails. I want to sort the array by an attribute of the object. Is it possible?
9 Answ...
Cannot create an array of LinkedLists in Java…?
I'm working on a sparse matrix class that needs to use an array of LinkedList to store the values of a matrix. Each element of the array (i.e. each LinkedList ) represents a row of the matrix. And, each element in the LinkedList array represents a column and the stored value.
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How can I put strings in an array, split by new line?
...ing with line breaks in my database. I want to convert that string into an array, and for every new line, jump one index place in the array.
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Is there any way to use a numeric type as an object key?
...her subjective. As William noted, for integer keys you can instead use an array. Most JS engines can use sparse arrays behind the scenes.
– Matthew Flaschen
Sep 3 '10 at 6:18
7
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filtering NSArray into a new NSArray in Objective-C
I have an NSArray and I'd like to create a new NSArray with objects from the original array that meet certain criteria. The criteria is decided by a function that returns a BOOL .
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ValueError: setting an array element with a sequence
... showed us, the only thing we can tell is that you are trying to create an array from a list that isn't shaped like a multi-dimensional array. For example
numpy.array([[1,2], [2, 3, 4]])
or
numpy.array([[1,2], [2, [3, 4]]])
will yield this error message, because the shape of the input list is...
Convert string with commas to array
How can I convert a string to a JavaScript array?
18 Answers
18
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Array.push() if does not exist?
How can I push into an array if neither values exist? Here is my array:
23 Answers
23
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Java String array: is there a size of method?
I come from a php background and in php, there is an array_size() function which tells you how many elements in the array are used.
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Merge/flatten an array of arrays
I have a JavaScript array like:
83 Answers
83
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