Create 3D array using Python
You should use a list comprehension: You could have produced a data structure with a statement that looked like the one you tried, but it would have had side effects since the inner lists are copy-by-reference:
arrays
numpy with python: convert 3d array to 2d
You need to use np.transpose to rearrange dimensions. Now, n x m x 3 is to be converted to 3 x (n*m), so send the last axis to the front and shift right the order of the remaining axes (0,1). Finally , reshape to have 3 rows. Thus, the implementation would be – Sample run –
Better way to sum a property value in an array
Updated Answer Due to all the downsides of adding a function to the Array prototype, I am updating this answer to provide an alternative that keeps the syntax similar to the syntax originally requested in the question. Original Answer Since it is an array you could add a function to the Array prototype. The Fiddle: http://jsfiddle.net/9BAmj/
What does %w(array) mean?
%w(foo bar) is a shortcut for [“foo”, “bar”]. Meaning it’s a notation to write an array of strings separated by spaces instead of commas and without quotes around them. You can find a list of ways of writing literals in zenspider’s quickref.
Passing a 2D array to a C++ function
There are three ways to pass a 2D array to a function: The parameter is a 2D arrayint array[10][10]; void passFunc(int a[][10]) { // … } passFunc(array); The parameter is an array containing pointersint *array[10]; for(int i = 0; i < 10; i++) array[i] = new int[10]; void passFunc(int *a[10]) //Array containing pointers { // … Read more
Where is Java’s Array indexOf?
There are a couple of ways to accomplish this using the Arrays utility class. If the array is not sorted and is not an array of primitives: If the array is primitives and not sorted, one should use a solution offered by one of the other answers such as Kerem Baydoğan’s, Andrew McKinlay’s or Mishax’s. The above code will compile even if theArray is primitive (possibly emitting … Read more
How to compare arrays in JavaScript?
To compare arrays, loop through them and compare every value: Comparing arrays: Usage: You may say “But it is much faster to compare strings – no loops…” well, then you should note there ARE loops. First recursive loop that converts Array to string and second, that compares two strings. So this method is faster than use … Read more
Error: can only iterate over an array or an instance of java.lang.Iterable
I assume Nodecollection is a com.aspose.words.NodeCollection. If you want to use the foreach syntax you better do:
How to convert an ArrayList containing Integers to primitive int array?
You can convert, but I don’t think there’s anything built in to do it automatically: (Note that this will throw a NullPointerException if either integers or any element within it is null.) EDIT: As per comments, you may want to use the list iterator to avoid nasty costs with lists such as LinkedList:
How to randomize (shuffle) a JavaScript array?
The de-facto unbiased shuffle algorithm is the Fisher-Yates (aka Knuth) Shuffle. See https://github.com/coolaj86/knuth-shuffle You can see a great visualization here (and the original post linked to this)